Quiz
Exam 1
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Perguntas do quiz (49)
1Biology is ______________________.
- AMostly a collection of facts that can be ordered and memorized
- Bthe study of living things
- Ca separate branch of science from the study of how organisms interact with each other and with their environment
- DBoth a) and b) are true
2A buffer is a chemical that:
- Acan quickly absorb H+ ions to keep a solution from becoming too acidic
- Bcan quickly release H+ ions to counteract any increases in the OH- concentration in a solution
- CIs identical to baking soda
- Drestore the pH of a solution to 7.0
- Ea) and b) are both true
3Pure water and aqueous solutions that are neither acidic nor basic are said to be:
- ABuffers
- BNeutral
- CTranslucent
- DTransparent
- EAlkaline
4The nucleus of an atom is usually made up of:
- Aprotons, neutrons, and proteins that hold them together
- BProtons, which have positive electrical charge, and proteins, which hold them together
- Cneutrons, which have no electrical charge
- Dprotons, that which a positive charge, and neutrons, which have no electrical charge
5A solution's acidity is:
- Aa measure of its negative charge (the stronger the negative charge, the more acidic the substance)
- Ba measure of the number of nucleotide bases in the solution
- Ca measure of the amount of buffer molecules in the solution
- Da measure of the number of all dissolved molecules in a solution
- Ea measure of the H+ (free floating protons) in it
6The pH of a fluid is a measure of:
- Aits capacity to function as a soap
- Bhow acidic or basic it is
- Cthe amount of adenosine triphosphate (ATP) in it
- Dits enzymatic stability
- Ethe concentration of phosphate groups
7Multiple atoms linked together are collectively called:
- Aa molecule
- Ban element
- Ca reactant
- Da substance
- Ean isotope
8Helium is not a reactive molecule because:
- Aits first-level shell is full with two protons
- Bits second-level shell is full with two electrons
- Cits first-level shell is full with two neutrons
- Dits first-level shell is full with two electrons
- EHelium is a reactive molecule
9Which of the following molecules is NOT formed by covalent bonding?
- ANaCl
- BH2
- CH2O
- DCH4
- EO2
10All matter on earth, both living and nonliving, is made up of:
- Acarbohydrates
- Batoms
- CDNA
- Dcells
- Ephospholipids
11There are three principal types of bonds that hold multiple atoms together.
- Ahydrogen bonds, ionic bonds, and glycosidic linkages
- Bcovalent bonds, ionic bonds, and hydrogen bonds
- Ccovalent bonds, ionic bonds, and disulfide bonds
- Dionic bonds, hydrogen bonds, and ester bonds
- Ephosphate bonds, disulfide bonds, and hydrogen bonds
12Water molecules form which type of bond with other water molecules?
- Adisulfide bridges
- Bionic bonds
- Chydrogen bonds
- Dcovalent bonds
- EVan der waals bonds
13An atom can be changed into an ion by adding or removing:
- Aa neutron
- Ban orbital shell
- Can electron
- Da proton
- Ean isotope
14______________________ is the smallest chemical unit of a type of pure substance
- Aan atom
- Ba proton
- Ca molecule
- Dan amino acid
- Ea cell
15which five chemical elements make up 93-97% of the biomass in plants, animals, fungi, and bacteria?
- Acarbon, oxygen, hydrogen, potassium, nitrogen
- Bcarbon, oxygen, hydrogen, sulfur, nitrogen
- Ccarbon, oxygen, hydrogen, nitrogen, phosphorous
- Dcarbon, oxygen, hydrogen, sulfur, phosphorous
- Ecarbon, oxygen, hydrogen, sulfur, potassium
16The number of protons in an element, also called its _____________, identifies the element.
- Anucleus
- Batomic number
- Cion
- Dcharge
- Eatomic weight
17Biology is to science as _______________ is to ____________________.
- Acollege baseball; professional baseball
- Bbasketball; sports
- CAmerican soccer; European football
- Dbaseball; tennis
- Ethe home team; the visiting team
18An element:
- Ais a substance that cannot be broken down chemically into any other substance
- Bis an atom that has lost a proton or an electron
- Cmust occur naturally on earth somewhere
- Dis a component of an atom
- EAll of the above are true
19All of the following are elements of biological literacy EXCEPT:
- Athe ability to communicate with others about issues having a biological component
- Bthe ability to use the process of scientific inquiry to think creatively about real-world issues having a biological component
- Cthe ability to integrate thoughts about issues having a biological component into your decision-making
- Dthe ability to write clearly and precisely about your observations, data gathering. and conclusions
- Eall of the above are elements of biological literacy
20Biological literacy is the ability to:
- Ause the process of scientific inquiry to think creatively about real-world issues that have a biological component
- Bcommunicate ideas about biology to others
- Cintegrate ideas about biology into your decision making
- Dall of the above are components of biological literacy
- Eonly b) and c) are components of biological literacy
21Thinking scientifically relies on which of the following?
- Aobjective observation and experimentation
- Blearning a list of facts
- Cintuition
- Dapplying your preconceptions
- Estatements from authorities
22Which of the following terms and phrases best describes the application of scientific purposes?
- Adeduction
- Btechnology
- Cjunk science
- Dstatistics
- Epseudoscience
23Statistical methods make it possible to:
- Aunambiguously learn the truth
- Bchoose the best answer to value-based questions
- Ctest non-falsifiable hypotheses
- Ddetermine how likely it is that certain results may have occurred by chance
- Ereject any hypothesis
24The scientific method will never prove or disprove:
- Athe existence of God
- Bthe beauty of Shakespeare's sonnets
- Cthe ability of echinacea to prevent the common cold
- Dall of the above are examples of statements that the scientific method will never prove or disprove
- Eonly a) and b) are examples of statements that the scientific method will never prove or disprove
25Scientific data:
- Amust be collected in laboratories
- Bcannot be collected in a completely unbiased way
- Care used to support or refute a hypothesis
- Dare always true
- Eall of the above are true
26A scientific theory is one that:
- Ais supported by many years of experimentation all supporting the hypothesis
- Bis based on hunches with no actual supporting evidence
- Csounds the most plausible
- Dis the result of all scientific experiments
- Echanges each time a different observation is made
27Despite all of the intellectual analyses the scientific method gives rise to and objective conclusions it makes possible, it CANNOT:
- Aaffect one's opinions about social issues
- Bgenerate new hypothesis
- Creject false claims
- Daid in technical advances
- Egenerate moral statements
28Carbohydrates:
- Aact as a relatively quick available source of fuel
- Bserve as carbon skeletons that can be rearranged to form other molecules that are essential for biological structures and functions like nucleic acids
- Cin the form of oligosaccharides are often covalently bonded to proteins and lipids on the outer cell surface, where they serve as cell recognition signals
- Dare a good source of sustained energy when they come in the form of polysaccharides
- Eall of the above
29The figure represents which class of chemical compounds?
- Afats
- Bacids
- Csterols
- Dcarbohydrates
- Eproteins
30The secondary structure of a protein refers to:
- Athe linear assembly of amino acids into a chain
- Bthe way two or more polypeptides bind to each other
- Cthe twisting of the amino acids chain into a corkscrew - like shape or into a zigzag folding pattern
- Dthe configuration of the folded protein when bounded to other proteins
- Enone of the above is correct
31Organic molecules consisting of only hydrogen and carbon are called:
- Acarbohydrates
- Benantiomers
- Chydrocarbons
- Dfats
- Ehydroxyls
32An unsaturated fatty acid in one in which:
- Acarbon-carbon double bonds are present in the hydrocarbon chain
- Bnot all of the carbons in the hydrocarbon chain are bonded to hydrogen atoms
- Cthere is an odd number of subunits in the hydrocarbon chain
- Dthere is an even number of subunits in the hydrocarbon chain
- Ecarbon-carbon double bounds are not present i the hydrocarbon chain
33Glycogen belongs in the class of molecules known as:
- Aamino acids
- Bmonosaccharides
- Cproteins
- Dpolysaccharides
- Enucleic acids
34Phospholipids assemble spontaneously into bilayers driven by the attraction of their "tail" portions to each other and of their "head" portions to each other. The tail regions are:
- Ahydrophilic
- Bcohesive
- Chydrophobic
- Dmolecularly charged
- Eadhesive
35If your hypothesis is rejected then,
- Ayou may still have learned something important about the system you were testing
- Byou should change the level of statistical significance until your hypothesis is accepted
- Cyour experiment was poorly designed
- Dyour experiment was a success
- Eyour experiment was a failure
36On food packages, "insoluble fiber" refers to plant material that we can't fully digest but is important for maintaining a healthy digestive tract. This substance refers to a(n):
- Aamino acid
- Bcarbohydrate
- Cprotein
- Dlipid
- Enucleic acid
37When conducting a scientific experiment, which of the following is tested?
- Aa prediction
- Ba result
- Ca theory
- Da question
- Ean observation
38Phenylketonuria is an inherited disorder. Affected individuals have a defective enzyme called phenylalanine hydroxylase. The substance these individuals cannot break down is a(n)
- Aprotein
- Bcarbohydrate
- Cnucleic acid
- Dlipid
- Eamino acid
39Lactose is a combination of:
- Aglucose and ribose
- Bsucrose and fructose
- Cglucose and galactose
- Dglucose and maltose
- Eglucose and fructose
40A nucleotide consists of a phosphate group, a pentose sugar, and _________________________, all linked together by covalent bonds.
- Aa triglyceride
- Ba polypeptide
- Ca phosphorus-containing base
- Da potassium-containing base
- Ea nitrogen-containing base
41DNA is made of:
- Anucleotides
- Bfour interconnected carbon rings
- Camino acids
- Dglucose molecules
- Efatty acids
42Which of the following statements about enzymes is NOT true?
- Aenzymes are permanently changed when they take place in a chemical reaction
- Benzymes are proteins
- Cenzymes speed up chemical reaction
- Denzymes often induce shape changes in the molecules to which they bind
- Eenzymes help initiate chemical reations
43One of the four nucleotide bases in DNA is replaced by a different base in RNA. Which base is it, and what is it replaced by?
- Acytosine, replaced by guanine
- Bguanine, replaced by cytosine
- Cthymine, replaced by guanine
- Dthymine, replaced by uracil
- Eadenine, replaced by uracil
44Enzymes:
- Acatalyze reactions that release energy, but not those that consume energy
- Bsometimes increase the amount of energy necessary to initiate a reaction
- Creduce the energy released by a reaction by one of four different mechanisms
- Dare always consumed by catalyzing a reaction
- Eincrease the rate at which a reaction occurs
45Which of the following nucleotide bases are present in equal amounts in DNA?
- Athymine and cytosine
- Badenine and guanine
- Cadenine and cytosine
- Dthymine and guanine
- Eadenine and thymine
46Which type of macromolecules is an informational molecule?
- ADNA
- Bfatty acid
- Cprotein
- Dpolysaccharide
- Emonosaccharide
47An amino acid is to a polypeptide as:
- Atestosterone is to a steroid hormone
- Ba nucleotide is to a nucleic acid
- Ctriglycerides are to fats
- Da phospholipid is to a plasma membrane
- Eglycogen is to glucose
48Scientific study always begins with:
- Ahypotheses
- Bexperiments
- Cconclusions
- Dpredictions
- Eobservations
49In a well-designed experiment:
- Athe prediction will be highly probable if the explanation is true
- Bthe prediction will be highly improbable if the explanation is not true
- Cthe null hypothesis will not be tested
- Dthe prediction will most likely be true
- Ea) and b) are both correct
Informações
- Descrição
- Chapters 1 & 2
- Autor
- Yuliya Klyashtof
- Idioma
- English
- Visualizações
- 237
- Avaliação
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