16338662
Descripción
Test por Jessica Dewald, actualizado hace más de 1 año
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Creado por Jessica Dewald
hace más de 5 años
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Pregunta 1
Pregunta
Morgan hypothesizes that the activity of amylase, an enzyme that catalyses the breakdown of starch, will be greater at 37*C than at 25*C. She prepares 2 tubes: Tube 1 and Tube 2. Morgan adds 2 g of starch and 1 mL of an enzyme suspension to Tube 1 and incubates it at 25*C for 20 min. To accurately test her hypothesis, Morgan should add 2 g of starch and 1 mL of the enzyme suspension to Tube 2 and incubate it at _______ for ________.
Respuesta
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25*C; 20 min
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37*C; 20 min
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25*C; 10 min
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37*C; 10 min
Pregunta 2
Pregunta
Ebola virus is a potentially deadly virus in the blood which causes Ebola fever. Ebola virus is often spread by monkeys. Scientists used 2 groups of monkey kidney cells in an experiment to confirm the first human case of Ebola fever. The scientists inoculated cells in Group 1 with samples of the Ebola virus taken from a human with Ebola fever. They did not inoculate the cells in Group 2. What was the control group in the experiment?
Respuesta
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The Ebola virus
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All of the monkey kidney cells
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Monkey kidney cells in Group 1
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Monkey kidney cells in group 2
Pregunta 3
Pregunta
Sunee and Jamila grow 2 distinct strains of E. coli bacteria following appropriate lab procedures. In Experiment 1, they use a new culture of Strain X and a 30-day old culture of Strain Y. In Experiment 2, they use a new culture of Strain Y and a 30-day old culture of Strain X. Sunee and Jamila measure the number of bacterial colonies and record the data in the graphs below. What is the most accurate conclusion about the growth rate of the bacteria?
Respuesta
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Strain X grows faster than Strain Y regardless of the culture's age
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Strain Y grows faster than Strain X regardless of the culture's age
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The 30-day old culture grows faster regardless of the strain
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The new culture grows faster regardless of the strain
Pregunta 4
Pregunta
Chan wants to determine how much the mass of fungus growing on a nutrient agar plate changes over an 8 hr period. What is the most appropriate unit of measure for him to use?
Respuesta
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Kilogram
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Kilometer
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Milligram
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Millimeter
Pregunta 5
Pregunta
A researcher counted the number of eggs a single fruit fly laid in 24 hrs for 5 days and recorded the findings in the table below. What is the average number of eggs laid per day over the 5 days?
Respuesta
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5
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10
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25
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50
Pregunta 6
Pregunta
The part of the experiment that does not contain the independent variable. Used for comparison.
Respuesta
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Control Group
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Experimental Group
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results
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data
Pregunta 7
Pregunta
What are all the things that are kept the same in an experiment and are not used for comparison?
Respuesta
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controls
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constants
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data
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results
Pregunta 8
Pregunta
What is an if....then statement that predicts the outcome of an experiment or how the Independent variable effects the dependent variable?
Respuesta
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conclusion
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hypothesis
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materials
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problem
Pregunta 9
Pregunta
Which of the following responds to the manipulated variable?
Respuesta
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independent variable
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dependent variable
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control
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constant
Pregunta 10
Pregunta
Given the following list of student test grades: 80, 90, 100, 65, 78, 84. What is their approximate average test grade overall?
Respuesta
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90
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65
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83
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78
Pregunta 11
Pregunta
At what depth does plant X start decreasing bubble production in figure 5?
Respuesta
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5
-
10
-
15
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20
Pregunta 12
Pregunta
The graph represents the average fastest speed of 5 animals recorded in one study. Based on the graph, which species is approximately 1/3 as fast as the cheetah?
Respuesta
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Elephant
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Kangaroo
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Lion
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Snake
Pregunta 13
Pregunta
After learning about viruses in Biology class, Sam decides to have his cat vaccinated against feline leukemia virus. According to the cell theory, are viruses, such as feline leukemia, considered living things?
Respuesta
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Yes, because they can reproduce
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Yes, because they are composed of cells
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No, because they cannot adapt to their environment
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No, because they are not composed of cells
Pregunta 14
Pregunta
What is the highest amount of bubble production from plant X from figure 5?
Respuesta
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15
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25
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35
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45
Pregunta 15
Pregunta
What is the correct order of organization of all living things from simplest to most complex?
Respuesta
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Atom, cell, organ, organ system, organism, molecule, tissue
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organism, organ system, organ, tissue, cell, molecule, atom
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Atom, molecule, cell, tissue, organ, organism, organ system
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Atom, molecule, cell, tissue, organ, organ system, organism
Pregunta 16
Pregunta
A scientist burned 100 g of rice until only 5 g of inorganic material remained. Approximate the percentage of inorganic material in the original 100 g rice sample.
Respuesta
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0.05%
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5%
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20%
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90%
Pregunta 17
Pregunta
Papain, an enzyme in papaya, breaks down polymers composed of amino acids. Which of the following substances does papain break down?
Respuesta
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Carbohydrates
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Fatty acids
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Nucleic acids
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Proteins
Pregunta 18
Pregunta
How do enzymes speed up chemical reactions?
Respuesta
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By reducing activation energy
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By reducing energy produced by the reaction
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By increasing activation energy
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By increasing energy produced by the reaction
Pregunta 19
Pregunta
What is the maximum number of covalent bonds that can form between a single carbon atom and 1 or more hydrogen atoms?
Respuesta
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1
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2
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3
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4
Pregunta 20
Pregunta
In the glycerol molecule below, there is a hydroxyl group (OH) bound to each of the 3 carbon atoms. The bond between the oxygen atom of a hydroxyl group and a carbon atom in glycerol is best classified as what type of bond?
Respuesta
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Covalent
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Hydrogen
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Intermolecular
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Ionic
Pregunta 21
Pregunta
Which substance releases H+ into a solution?
Respuesta
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Acid
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Base
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Alkaline
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Buffer
Pregunta 22
Pregunta
This substance releases -OH into a solution?
Respuesta
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Base
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Buffer
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Acid
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Water
Pregunta 23
Pregunta
As part of an experiment, a student adds 10 mL of 5% hydrochloric acid solution to 100 mL of a non-buffered, colorless solution of sugar. What is the most likely result?
Respuesta
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The concentration of hydroxide ions (OH-) will increase
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The concentration of hydrogen ions (H+) will increase
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The pH will not change
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The pH will increase
Pregunta 24
Pregunta
Honey is composed mostly of glucose and fructose. What property of water explains why honey dissolves easily in water?
Respuesta
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Water exhibits strong cohesion
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Water has a high specific heat
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Water is a polar molecule
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Water is easily ionized
Pregunta 25
Pregunta
Movement of water molecules across a selectively permeable membrane from an area of higher water concentration to an area of lower water concentration.
Respuesta
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Osmosis
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Endocytosis
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Exocytosis
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Cell membrane
Pregunta 26
Pregunta
True or False. Eukaryotes have DNA enclosed in a Nucleus.
Respuesta
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true
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false
Pregunta 27
Pregunta
Which type of transport requires energy because it moves from an area of low concentration to an area of high concentration?
Respuesta
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active transport
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passive transport
Pregunta 28
Pregunta
A form of passive transport that uses transport proteins.
Respuesta
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simple diffusion
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facilitated diffusion
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endocytosis
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exocytosis
Pregunta 29
Pregunta
What trait of an ATP molecule enables it to store energy for use by cells?
Respuesta
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Its small size
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Its solubility in water
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Its ability to form hydrogen bonds
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Its phosphate-phosphate bond
Pregunta 30
Pregunta
The diagram below shows a cell membrane composed of a phospholipid bilayer with a channel protein. Each x represents the same type of molecule inside or outside the cell. Facilitated diffusion moves these molecules across the cell membrane. In what direction do these molecules (x) move and through with structure?
Respuesta
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Into the cell through the channel protein
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Into the cell through the phospholipid bilayer
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Out of the cell through the channel protein
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Out of the cell through the phospholipid bilayer
Pregunta 31
Pregunta
The diagrams below represent different stages of animal cell division. From start to finish, what is the correct order of the stages?
Respuesta
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2, 4, 3, 1
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2, 3, 4, 1
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3, 2, 1, 4
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3, 1, 2, 4
Pregunta 32
Pregunta
A cell will __________________ in a hypotonic solution.
Respuesta
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swell and perhaps burst (lyse)
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the size of the cell will not change
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shrink
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the size of the cell will change from large to small and from small to large
Pregunta 33
Pregunta
How does a cell maintain homeostasis?
Respuesta
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Regulates what enters and leaves the cell
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Protective barrier
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Flexibility
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Structure and support
Pregunta 34
Pregunta
The aerobic and anaerobic pathways of cellular respiration require which products of glycolysis?
Respuesta
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NADH and ATP
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Pyruvate and ATP
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Pyruvate and NADH
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Pyruvate
Pregunta 35
Pregunta
A paramecium lives in a relatively hypotonic environment. Which of these structures does the paramecium use to maintain homeostasis under these conditions, and how does it do so?
Respuesta
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Contractile vacuole; by expelling water from the intracellular space into the extracellular space.
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Contractile vacuole; by absorbing water from the extracellular space into the intracellular space.
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Lysosome; by expelling water from the intracellular space into the extracellular space.
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Lysosome; by absorbing water from the extracellular space into the intracellular space.
Pregunta 36
Pregunta
The presence of which of the following structures in a cell would indicate that the cell is a photosynthetic bacterium?
Respuesta
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Cell wall
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Chloroplast
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DNA
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Ribosome
Pregunta 37
Pregunta
An organelle found in a liver cell would best be identified as a lysosome if its primary function was which of the following?
Respuesta
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Processing and packaging of cellular materials prior to export
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Harvesting of light energy to produce carbohydrates
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Detoxification of poisonous molecules within the cell
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Digestion of macromolecules and old organelles
Pregunta 38
Pregunta
Sorts, packages, and distributes proteins.
Respuesta
-
Smooth endoplasmic reticulum
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Rough endoplasmic reticulum
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Golgi apparatus
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Lysosomes
Pregunta 39
Pregunta
Filled with digestive enzymes that aid in the breakdown of lipids, carbohydrates, and proteins into smaller molecules that can be used by the rest of the cell.
Respuesta
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Chloroplast
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Lysosomes
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Mitochondria
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Vacuoles
Pregunta 40
Pregunta
Which of the following is an example of a prokaryotic cell?
Respuesta
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Plant cell
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Animal cell
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Bacteria cell
Pregunta 41
Pregunta
Convert chemical energy stored in food into compounds that are more convenient for the cell to use.
Respuesta
-
Mitochondria
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Chloroplast
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Cell membrane
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Vacuoles
Pregunta 42
Pregunta
Convert sunlight into energy via photosynthesis.
Respuesta
-
Mitochondria
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Chloroplast
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Cell membrane
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Vacuoles
Pregunta 43
Pregunta
DNA molecules differ from RNA molecules in which of the following ways?
Respuesta
-
l and ll only
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l and lll only
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ll and lll only
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l, ll, and lll
Pregunta 44
Pregunta
In fruit flies, red (R) eye color is dominant over white (r) eye color. Use the Punnett square method to determine the genotype ratio of the offspring that will be heterozygous from a cross between a heterozygous red eyed fly with a homozygous white eyed fly.
Respuesta
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1/4
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1/2
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3/4
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4/4
Pregunta 45
Pregunta
B = brown eyes b = blue eyes
What is true about these two brothers that have brown eyes? One has genotype BB the other Bb.
Respuesta
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they have same phenotype and genotype
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they have same phenotype but different genotypes
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they have different genotypes and phenotypes
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they have same genotype but different phenotypes
Pregunta 46
Pregunta
Suppose that in humans, a certain type of color blindness is a recessive, X-linked trait. The chromosomes and alleles associated with this type of color blindness are represented in the chart below. Which of these could NOT be a biological child of parents having the genotypes XBXb and XBY?
Respuesta
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Color-blind son
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Color-blind daughter
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Daughter with normal color vision
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Son with normal color vision
Pregunta 47
Pregunta
Alkaptonuria is a genetic disorder of protein metabolism. The disorder is determined by 2 alleles at 1 locus. Looking at the diagram below determine the genotype for individual 1.
Respuesta
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AA or Aa
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AA
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Aa
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aa
Pregunta 48
Pregunta
In humans, pigmented skin is dominant to non-pigmented skin (albinism). What is the genotype of an individual with albinism?
Respuesta
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Carrier
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Heterozygous
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Homozygous dominant
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Homozygous recessive
Pregunta 49
Pregunta
The mRNA sequence ACU codes for the amino acid Thr. A mutation occurs, and the resulting mRNA sequence is AUU. What amino acid will replace Thr?
Respuesta
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Val
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Met
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Lie
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Ala
Pregunta 50
Pregunta
Cytochrome C is a protein used in the electron transport chain. This table shows short sections of Cytochrome C's amino acid sequences in 5 organisms, using single letter abbreviations.
Use this data to determine which organism most likely shares the most recent common ancestor with humans.
Respuesta
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organism 1
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organism 2
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organism 3
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organism 4
Pregunta 51
Pregunta
Which of the following figures represents bone tissue?
Respuesta
Pregunta 52
Pregunta
In coho salmon, hooknose males are large and jack males are small. Average-sized males exist, but are rare. What statement best explains disruptive selection in male coho salmon?
Respuesta
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Average-sized males reach the spawning ground first.
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The scent of average-sized males makes them most attractive to females.
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Hooknose males produce stronger sperm than jack males or average-sized males.
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The relative size of hooknose males and jack males is an advantage during mating.
Pregunta 53
Pregunta
For biological evolution to occur by way of natural selection, the trait being selected for need NOT be:
Respuesta
-
be heritable
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vary among individuals
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increase an individual's life span
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increase an individual's reproductive success
Pregunta 54
Pregunta
Much of the genetic diversity existing in modern multicellular organisms is most likely a result of:
Respuesta
-
DNA mutations originating in gametes
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DNA mutations originating in somatic cells
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Protein mutations originating in gametes
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Protein mutations originating in somatic cells
Pregunta 55
Pregunta
The following cladogram illustrates the proposed evolutionary relationships of several extant species (A-E).
According to the cladogram below, which of the following species is most closely related to Species B?
Respuesta
-
Species A
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Species C
-
Species D
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Species E
Pregunta 56
Pregunta
Alec studied an unknown microscopic, unicellular organism and recorded his observations. He noted that the organism had DNA, ribosomes, and a cell wall, but no nucleus or other membrane-bound organelles. Based on Alec's observations, the organism would be best classified as a:
Respuesta
-
virus
-
protist
-
fungus
-
bacteria
Pregunta 57
Pregunta
An entomologist identified a new species of beetle in a South American rainforest. The beetle has all the features of the darkling beetle family Tenebrionidae and closely resembles other darkling beetles of the genus Tenebrio. What should the entomologist do next?
Respuesta
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Give the beetle new genus and family names
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Name the beetle after the species it is most similar to
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Discard the beetle because it is not found in existing taxonomy
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Place the beetle the same genus Tenebrio but give it a new species name
Pregunta 58
Pregunta
In what kingdom would scientists most likely classify a multicellular, non-motile, autotrophic, photosynthetic organism with a cell wall containing cellulose?
Respuesta
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Animalia
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Fungi
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Plantae
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Protista
Pregunta 59
Pregunta
Which of the following is most likely an example of an innate behavior?
Respuesta
-
A monkey washing its food in a stream after watching another monkey do the same.
-
A young coyote avoiding porcupines after the porcupine sticks the coyote with its quills.
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A sea turtle hatchling orienting itself toward the ocean upon emerging from its underground nest.
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A chimpanzee stacking boxes to reach bananas hanging from the ceiling of its enclosure.
Pregunta 60
Pregunta
Which physiological system includes the lungs, trachea, and pharynx?
Respuesta
-
Endocrine
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Nervous
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Reproductive
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Respiratory
Pregunta 61
Pregunta
Marco grows algae in the presence of a substance that stops the light-independent reactions of photosynthesis. As a result, which molecules will the light-dependent reactions eventually stop producing?
Respuesta
-
ADP and NADP+
-
ADP and NADPH
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ATP and NADP+
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ATP and NADPH
Pregunta 62
Pregunta
Which of the following statements best describes how, in trees, water moves from the roots to the leaves?
Respuesta
-
Transpiration from the leaves pulls water upward.
-
Gravity continually pulls water and nutrients upward.
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Xylem contracts and pushes water and nutrients upward.
-
Trees use energy from ATP to push water and nutrients upward.
Pregunta 63
Pregunta
An oxpecker is a bird that usually feeds on parasites on a rhinoceros's back. It occasionally picks scabs off the rhinoceros's back and drinks blood from the wounds. Describe the relationship(s) between the oxpecker and the rhinoceros.
Respuesta
-
Mutualism only
-
Mutualism and commensalism
-
Mutualism and predation
-
Mutualism and parasitism
Pregunta 64
Pregunta
When a new volcanic island forms, the pioneer species are the first species to successfully colonize the island. Which of the following characteristics would be the most ADVANTAGEOUS to a pioneer species colonizing this newly formed island?
Respuesta
-
Low dispersal rate
-
Low environmental tolerance
-
High reproductive rate
-
Short life span
Pregunta 65
Pregunta
Louise places 1 bacterium in a Petri dish at time 0. The population increases exponentially, doubling every hour, and there are no limiting factors. How many bacteria will be in the Petri dish after 6 hours?
Respuesta
-
6
-
16
-
32
-
64
Pregunta 66
Pregunta
Using the graph below, determine which statement most likely describes the relationship between the population of organisms and the resources available to the population.
Respuesta
-
There are adequate resources to support this stable population.
-
There are adequate resources to support this unstable population.
-
There are inadequate resources to support this stable population.
-
There are inadequate resources to support this unstable population.
Pregunta 67
Pregunta
Which energy pyramid accurately represents the amount of energy in a desert food chain including cactus, hawk, insect, and snake?
Respuesta
Pregunta 68
Pregunta
A biologist recorded the number of rabbits in a population over 30 generations. Which of the following statements best explains why the number of rabbits in the population dramatically decreased between Points A and B shortly after the 10th generation?
Respuesta
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a new predator that feeds solely on the rabbits' main competitor was introduced into the rabbits' habitat.
-
a change in environmental conditions led to a significant increase in the amount of food available to the rabbits.
-
a fatal disease infected a large proportion of the rabbits in this population.
-
area farmers set traps for coyotes, the rabbits' main predator.
Pregunta 69
Pregunta
According to this simple lake food chain below, which of these organisms is a tertiary consumer?
Respuesta
-
Pike
-
Perch
-
Dragonfly larvae
-
Mosquito larvae
Pregunta 70
Pregunta
Assume that 10% of the energy absorbed by one trophic level is transferred to the next successive level and the same amount of energy is available at the primary producer level of each of the food chains below. How much energy would be available to humans in Food Chain 2 as compared to the energy available to humans in Food Chain 1?
Respuesta
-
10 times less energy
-
10 times more energy
-
100 times less energy
-
100 times more energy
Pregunta 71
Pregunta
An animal has these characteristics:
1. Many more than 8 jointed legs on a segmented body.
2. 2 pairs of legs attached to each body segment.
3. Lacks biting jaws
Use the key to determine what animal this is.
Respuesta
-
Dragonfly
-
Millipede
-
Sea star
-
Slug
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