4131970
Pregunta 1
Pregunta
Which of the following do not occur during interphase
Respuesta
-
Replication
-
Translation
-
Cytokinesis
-
An increase in the number of mitochondria
Pregunta 2
Pregunta
What is the difference between galactose and lactose
Respuesta
-
Lactose is a disaccharide and galactose is a monosaccharide
-
Lactose is the product of anaerobic respiration in humans and galactose is the product of anaerobic respiration in yeast
-
Lactose is an enzyme and galactose is a hormone
-
Galactose is a sugar found in milk but lactose is not found in milk
Pregunta 3
Pregunta
In a cell what is the effect of a large surface to volume ratio?
Respuesta
-
Slower rate of exchange of waste materials
-
Faster heat loss
-
Faster rate of mitosis
-
Slower intake of food
Pregunta 4
Pregunta
How can cells in a multicellular organism differentiate?
Respuesta
-
They express some of their genes but not others
-
They all have different genetic composition
-
Different cells contain a different set of chromosomes
-
Different cells do not have some chromosomes
Pregunta 5
Pregunta
What happens during the G2 stage of interphase
Respuesta
-
Homologous chromosomes pair
-
Synthesis of protiens
-
Homologous chromosomes separate
-
DNA replicates
Pregunta 6
Pregunta
Resolution is the ability to see two objects
Respuesta
-
As separate objects
-
As one object
-
In more detail
-
In less detail
Pregunta 7
Pregunta
The diameter of the drawing is 100mm. The actual image is 100um. What is the magnification of the drawing?
Respuesta
-
0.001
-
100
-
400
-
1000
Pregunta 8
Pregunta
What is the difference between plant and animal cells?
Respuesta
-
Animal cells burst when they take in excess water by osmosis whereas plant cells do not.
-
Plant cells store cellulose whereas animal cells store starch
-
Animal cells have ribosomes whereas plant cells do not
-
Plant cells have a cell wall where as animal cells have a cell membrane
Pregunta 9
Pregunta
How do prokaryotic cells divide?
Respuesta
-
By mitosis
-
By meiosis
-
By budding
-
By binary fission
Pregunta 10
Pregunta
What advantages does electron microscopy have over light microscopy?
Respuesta
-
Excellent resolution throughout magnification range
-
Biological material is easy to prepare and stain
-
Movement of living cells can be seen
Pregunta 11
Pregunta
What is the only membranous structure inside a prokaryotic cell?
Respuesta
-
Mesosome
-
Ribosome
-
Mitochondrion
-
RER
Pregunta 12
Pregunta
What are organelles?
Respuesta
-
Small structures in the cytoplasm of a cell that have more than one function
-
Membrane bound structures found near the nucleus of all cells
-
Discrete structures found inside all cells that have specific functions
-
Specialised cells inside an organ that have one function
Pregunta 13
Pregunta
Which organelles have a transport function?
Respuesta
-
Ribosome and Golgi apparatus
-
Golgi apparatus and ER
-
Mitochondrion and ER
-
Mitochondrion and ribosome
Pregunta 14
Pregunta
Which functions of life are carried out by unicellular organisms?
Respuesta
-
Nutrition but not reproduction
-
Nutrition and reproduction, but not excretion
-
Nutrition, reproduction and excretion but not transmission of nerve impulses
-
Nutrition, reproduction, excretion and transmission of nerve impulses
Pregunta 15
Pregunta
Which of the following characterises tissues?
Respuesta
-
A group of cells that develop independantly
-
A group of organs that have the same function
-
A group of cells that have the same function
-
A group of organs that have the same structure
Pregunta 16
Pregunta
Which of the following explains how brain cells develop to carry out their functions?
Respuesta
-
The cells have interacted to become brain cells
-
The cells have evolved that way
-
Some genes are expressed while others are not
-
All genes are expressed in the brain
Pregunta 17
Respuesta
-
Cell Wall
-
Plama Membrane
-
Cytoplasm
-
Nucleoid
Pregunta 18
Respuesta
-
Mitochondria
-
Rough Endoplasmic Reticulium
Pregunta 19
Pregunta
Homeostasis is maintaining the conditions inside a cells within tolerable limits
Respuesta
- True
- False
Pregunta 20
Respuesta
-
Endoplasmic Reticulum
-
Mitochondion
-
Nucleus
-
Cytoplasm
-
Golgi Apparatus
-
Lysosome
-
Ribosome
Pregunta 21
Respuesta
-
Plasma Membrane
-
Cell Wall
-
Cytoplasm
-
Vacuoles
-
Nucleuolus
-
Chloroplasts
-
Mitochondion
-
Centrioles
Pregunta 22
Respuesta
-
Cell Wall
-
Plasma Membrane
-
Golgi Apparatus
-
Chloroplast
-
Large Vacuole
-
Mitochondion
-
Cytoplasm
-
Rough Endoplasmic Reticulum
-
Nucleus
-
Nuclear Membrane
-
Golgi Apparatus
-
Ribosomes
Pregunta 23
Pregunta
In active transport molecules pass through the following part of the cell membrane
Respuesta
-
Protein Channels
-
Phospholipid bilayer
-
Phosphate heads
-
Cholesterol tails
Pregunta 24
Pregunta
In the structure of the cell membrane, glycoproteins are
Respuesta
-
Carbohydrate chains attached to membrane proteins
-
Protein tails attached to phospholipids
-
Carbohydrate tails attached to phospholipids
-
Protein channels attached to cholestrol
Pregunta 25
Pregunta
Active transport is controlled by
Respuesta
-
The concentration gradient
-
Nature of transport substances
-
Amount of water
-
Amount of solute
Pregunta 26
Pregunta
In endocytosis vesicles formed around the engulfed particles are formed by
Respuesta
-
ER
-
Nuclear envelope
-
Lysosomes
-
Cell Membrane
Pregunta 27
Pregunta
Cells engaged in active transport have a high number of
Respuesta
-
Golgi Apparatus
-
Mitochondia
-
Lysosomes
-
Ribosomes
Pregunta 28
Pregunta
Pinocytic vesicles can be found in
Respuesta
-
Wheat cells
-
Potato cells
-
Liver cells
-
Bacteria
Pregunta 29
Pregunta
The thyroid gland can concentrate iodine to a level higher than that of the blood, this is an example of
Respuesta
-
Diffusion
-
Osmosis
-
Active Transport
-
Pinocytosis
Pregunta 30
Pregunta
In osmosis, water molecules can pass through selectively permeable membrane but not the solute because they are different in
Respuesta
-
Size
-
Kinetic energy
-
Speed
-
Concentration
Pregunta 31
Pregunta
If pieces of potato are placed in a hypotonic solution, they will
Respuesta
-
Shrink
-
Increase in Weight
-
Decrease in Weight
-
Stay the same
Pregunta 32
Respuesta
-
Polar (hydrophilic) head
-
Non polar (hydrophobic) tail
-
Integral protein
-
Glycoprotein
-
Pump/Channel protein
-
Cholesterol
-
Peripheral protein
-
Fluid Mosaic Model
Pregunta 33
Pregunta
Gaseous exchange occurs by
Respuesta
-
Osmosis
-
Diffusion
-
Active Transport
-
Pinocytosis
Pregunta 34
Respuesta
-
G1
-
S
-
G2
-
Interphase
-
Cell Division
-
Mitosis
-
Prophase
-
Metaphase
-
Anaphase
-
Telophase
-
Cytokinesis
Pregunta 35
Respuesta
-
Anaphase
-
Interphase
-
Metaphase
-
Prophase
-
Telophase
Pregunta 36
Pregunta
The longest phase of the cell cycle
Respuesta
-
Prophase
-
Interphase
-
Metaphase
-
Mitosis
Pregunta 37
Pregunta
In interphase the cell [blank_start]enlarges[blank_end], the [blank_start]DNA[blank_end] replicates, and the organelles [blank_start]replicate[blank_end]. This is the [blank_start]longest[blank_end] phase of the cell cycle. Then the cell goes to [blank_start]prophase[blank_end] where the chromosomes [blank_start]condense[blank_end] and the [blank_start]nucleolus[blank_end] dissipates. The [blank_start]spindle fibres[blank_end] start to form and centrioles start to move to [blank_start]polar ends[blank_end] of the cell. Then it moves to [blank_start]metaphase[blank_end] where the membranes disintegrates and the spindle fibres [blank_start]attach[blank_end] to the chromosomes and line up in a straight line in the [blank_start]equator[blank_end] of the cell. Then [blank_start]anaphase[blank_end] the spindle fibres [blank_start]move to polar ends[blank_end] and the [blank_start]sister chromatids[blank_end] pull apart. The [blank_start]telophase[blank_end] the chromosomes dissipate and fibres dissolve. Then cytokinesis which is a process that is [blank_start]different[blank_end] in both plant and animal cells.
Respuesta
-
enlarges
-
DNA
-
replicate
-
longest
-
prophase
-
condense
-
nucleolus
-
spindle fibres
-
polar ends
-
metaphase
-
attach
-
equator
-
anaphase
-
move to polar ends
-
sister chromatids
-
telophase
-
different
Pregunta 38
Respuesta
-
Metaphase
-
Anaphase
-
Anaphase
-
Interphase
-
Prophase
-
Prophase
-
Cytokinesis
Pregunta 39
Pregunta
Mitotic Index= [blank_start]number of cells in mitosis[blank_end]/ [blank_start]total number of cells[blank_end]
Respuesta
-
number of cells in mitosis
-
total number of cells
Pregunta 40
Pregunta
Which process removes waste material of metabolism from the body?
Respuesta
-
Excretion
-
Nutrition
-
Reproduction
-
Respiration
Pregunta 41
Pregunta
What is a mutation?
Respuesta
-
a change in a gene or chromosome
-
a condition cause by a recessive allele
-
a process used in genetic engerneering
-
a type of discontinuous variation
Pregunta 42
Pregunta
Which structure is only found in plant cells?
Respuesta
-
cell membrane
-
chloroplasts
-
cytoplasm
-
nucleus
Pregunta 43
Pregunta
Which process involves the release of energy from food substances in all living organisms?
Respuesta
-
Breathing
-
Nutrition
-
Respiration
-
Transpiration
Pregunta 44
Pregunta
What is a cytoplasm?
Respuesta
-
a fluid filled sac
-
a jelly like substance
-
a surrounding wall
-
a tiny green disc
Pregunta 45
Pregunta
What is an example of osmosis?
Respuesta
-
Carbon dioxide goes out through the stomata of a leaf
-
Digested food is absorbed from the small interstine
-
Oxygen goes into the blood from an alveolus
-
Water enters a plant root from the cell
Pregunta 46
Pregunta
What is an example of homeostasis?
Respuesta
-
Breathing oxygen
-
Regulation blood in glucose
-
Removing undigested food through the anus
-
Urinating to empty the bladder
Pregunta 47
Pregunta
Which organisms carry out respiration, growth, movement and excretion?
Respuesta
-
All animal and plants
-
Animals only
-
Arthropods and flowering plants only
-
Plants only
Pregunta 48
Pregunta
Osmosis is defined as the diffusion of water molecules
Respuesta
-
Down a concentration gradient through a partially permeable membrane
-
Down their concentration gradient through a permeable membrane
-
Up their concentration gradient through a partially permeable membrane
-
Up their concentration gradient through a permeable membrane
Pregunta 49
Pregunta
What is an Organ?
Respuesta
-
Group of tissues that have combined to form a single structure
-
Group of cells that develop in the same with the same structure and function
-
Discreet structure found inside a cell
-
Group of organs within an organism, that together carry out a process
Pregunta 50
Pregunta
The [blank_start]cell theory[blank_end] tells us that all [blank_start]living[blank_end] organisms are made up of cells which are the [blank_start]smallest possible[blank_end] units of life and comes from [blank_start]pre-existing[blank_end] cells.
Respuesta
-
cell theory
-
living
-
smallest possible
-
pre-existing
Pregunta 51
Pregunta
What is a cell?
Respuesta
-
A cytoplasm enclosed in a plasma membrane
-
A cytoplasm enclosed in a cell wall
-
A nucleus enclosed in a cell membrane
-
A nucleus enclosed in a cell wall
Pregunta 52
Pregunta
Magnification= [blank_start]scale bar length[blank_end]/[blank_start]actual object scale bar length[blank_end]
Respuesta
-
scale bar length
-
actual object scale bar length
Pregunta 53
Pregunta
A cell wall is made out of [blank_start]cellulose[blank_end] and it surrounds the [blank_start]plasma membrane[blank_end]. It gives the cell its shape and prevents [blank_start]osmosis[blank_end] from [blank_start]bursting[blank_end] the cell.
Respuesta
-
cellulose
-
plasma membrane
-
osmosis
-
bursting
Pregunta 54
Pregunta
[blank_start]Plasma membranes[blank_end] surrounds the cell and [blank_start]regulates[blank_end] what enters and leaves the cell.
Respuesta
-
regulates
-
Plasma membranes
Pregunta 55
Pregunta
[blank_start]Binary fission[blank_end] is an [blank_start]asexual[blank_end] reproductive process in [blank_start]eukaryotic[blank_end] cells in which the cells grow larger and eventually the two chromosomes separate and move to opposite ends of the cell. The partition forms between chromosomes.
Respuesta
-
Binary fission
-
asexual
-
eukaryotic
Pregunta 56
Pregunta
The organelle that provides temporary storage of foods, enzymes and waste products is what?
Respuesta
-
Mitochondria
-
Vacuole
-
Chloroplast
-
Golgi apparatus
Pregunta 57
Pregunta
Cell wall, centrioles, lysosome, plastids are all organelles found in plant cells.
Respuesta
- True
- False
Pregunta 58
Pregunta
Which of the following are true for Eukaryote cells?
Respuesta
-
A naked loop of DNA
-
Double nucleur membrane called the nucleur envelope
-
80s Ribosomes
-
Mitochondria
Pregunta 59
Pregunta
Which of the following are true for Prokaryotic cells?
Respuesta
-
Naked loop of DNA
-
80s Ribosomes
-
Mitochondria
-
Internal membranes
Pregunta 60
Pregunta
What are sister chromatids?
Respuesta
-
Two separate identical chromosomes
-
Two related chromosomes
-
Two identical halves of a chromosome tied together
-
None of these
Pregunta 61
Pregunta
Which type of cell does a cell plate form during cytokinesis?
Respuesta
-
Animal cell
-
Plant cell
-
Protist cell
-
Bacterial cell
Pregunta 62
Pregunta
Sister chromatids are joined together by which of the following?
Respuesta
-
Centrosome
-
Centromere
-
Spindle
-
Kinetochore
Pregunta 63
Pregunta
Which of the following do animal cells have that plant cells do not have?
Respuesta
-
Spindle fibers
-
Poles
-
Microtubules
-
Centrioles
Pregunta 64
Pregunta
Diploids are [blank_start]two sets[blank_end] of chromosomes.
Respuesta
-
two sets
Pregunta 65
Pregunta
Which of the following is a function of cellulose in plants?
Respuesta
-
Storage of fate
-
Formation of mitochondria
-
Storage of energy
-
Formation of cell walls
Pregunta 66
Pregunta
What is the difference between a cell the G1 phase and a cell in a G2 phase of a cell cycle?
Respuesta
-
A cell in the G2 phase would be smaller that a cell in the G2 phase
-
A cell in G2 phase would have more mitochondria than a cell in G2 phase
-
A cell in the G1 phase would have more DNA in its chromosomes than a cell in the G2 phase
-
DNA replication occurs in the G1 phase but not the G2 phase
Pregunta 67
Pregunta
Water rises in capillaries due to
Respuesta
-
Adhesion only
-
Cohesion only
-
Adhesion and Cohesion
-
Evaporation
Pregunta 68
Pregunta
Insects can walk on the surface of water due to
Respuesta
-
Adhesion
-
Cohesion
-
Adhesion and cohesion
-
Evaporation
Pregunta 69
Pregunta
Ice floats on the surface of water because of
Respuesta
-
Expansion
-
Contraction
-
Evaporation
-
Surface Tension
Pregunta 70
Pregunta
Water molecules are attached together by
Respuesta
-
Condensation
-
Hydrolysis
-
Hydrogen bonds
-
Covelent bonds
Pregunta 71
Pregunta
In evaporation of water
Respuesta
-
Hydrogen bonds are broken
-
Hydrogen bonds are formed
-
Covalent bonds are broken
-
Covalent bonds are formed
Pregunta 72
Pregunta
In a solid state a water molecule is attached to the following number of other water molecules
Respuesta
-
1
-
2
-
3
-
4
Pregunta 73
Pregunta
Water resists increase in temperature because the gained heat is spent in
Respuesta
-
Breaking hydrogen bonds
-
Forming hydrogen bonds
-
Breaking covalent bonds
-
Forming covalent bonds
Pregunta 74
Pregunta
Water is a polar molecule with
Respuesta
-
Two positively charged corners and two negatively charged corners
-
Two positively charged corners and one negatively charged corners
-
One positively charged corners and two negatively charged corners
-
One positively charged corners and one negatively charged corners
Pregunta 75
Pregunta
A polysaccharide made of glucose molecules has the following formula
Respuesta
-
C5H10O5
-
5CH12O6
-
C30H60O30
-
D30H52O26
Pregunta 76
Pregunta
A polysaccharide with 20 glucose units has the following number of glycosidic bonds
Respuesta
-
5
-
6
-
19
-
20
Pregunta 77
Pregunta
Digestion involves
Respuesta
-
Condensation
-
Hydrolisis
-
Polymerization
-
Dehydration synthesis
Pregunta 78
Pregunta
Glucose functions is
Respuesta
-
Cellulose
-
Lignin
-
Starch
-
Glycogen
Pregunta 79
Pregunta
How many amino acids does a polypeptide with 6 peptide bonds have
Respuesta
-
3
-
4
-
5
-
7
Pregunta 80
Pregunta
A fat molecule is made of
Respuesta
-
Carbon, hydrogen and oxygen
-
3 fatty acids and glycerin
-
One sugar and 3 fatty acids
-
More than one gycerol
Pregunta 81
Respuesta
-
Ribose
Pregunta 82
Pregunta
Identify compound and label parts
Respuesta
-
Variable group (R)
-
Amine group
-
Triglyceride
Pregunta 83
Respuesta
-
Glycerol
Pregunta 84
Respuesta
-
Amino Acid
Pregunta 85
Respuesta
-
Dipeptide
Pregunta 86
Pregunta
A skeletal muscle is a exception to the cell theory because it is multinucleate (contains hundreds of nuclei)
Respuesta
- True
- False
Pregunta 87
Pregunta
Giant algae is an exception to the cell theory as it has many cells and they contain many nucleus.
Respuesta
- True
- False
Pregunta 88
Pregunta
A unicellular organism consists of many cells and can carry out all the functions of life.
Respuesta
- True
- False
Pregunta 89
Pregunta
As a cell grows larger its surface area to volume ratio becomes [blank_start]smaller[blank_end].
Respuesta
-
smaller
-
larger
-
wider
-
shorter
Pregunta 90
Pregunta
Different groups of cells become specialised for different functions by the process of differentiation in unicellular organisms.
Respuesta
- True
- False
Pregunta 91
Pregunta
The whole is greater than the sum of its parts: [blank_start]emergent properties[blank_end]
Respuesta
-
emergent properties
-
differentiation
Pregunta 92
Pregunta
Stem cells have the ability to divide and differentiate along different pathways.
Respuesta
- True
- False
Pregunta 93
Pregunta
Human embryos consist entirely of stem cells in their early stages.
Respuesta
- True
- False
Pregunta 94
Pregunta
In favour of therapeutic use of stem cells is:
Respuesta
-
Health and quality of life of patients suffering from an otherwise incurable disease may be greatly improved.
-
Human life even at early stages.
-
Lack nervous systems so do not feel pain or suffer.
-
Depends on the source and stage of the embryo.
Pregunta 95
Pregunta
The [blank_start]shorter[blank_end] the wave length the higher the resolution.
Respuesta
-
shorter
-
longer
Pregunta 96
Pregunta
The chloroplast carries out photosynthesis.
Respuesta
- True
- False
Pregunta 97
Pregunta
The plasma membrane prevent the cell bursting/shrinking during osmosis.
Respuesta
- True
- False
Pregunta 98
Pregunta
The cell wall controls entry and exit of substances.
Respuesta
- True
- False
Pregunta 99
Pregunta
The following are compartmentalised (membrane-bound) organelles:
Respuesta
-
Nucleus
-
Plasmid
-
Ribosomes
-
Mitochondria
-
Chloroplasts
Pregunta 100
Pregunta
The rate at which materials enter or leave a cell depends on the surface of the cells. However, the rate at which materials are used or produced depends on the volume.
Respuesta
- True
- False
Pregunta 101
Pregunta
[blank_start]Binary fission[blank_end] is the splitting of two cells and the DNA is replicated identically.
Respuesta
-
Binary fission
-
Mitosis
-
Meiosis
-
Cell Division
Pregunta 102
Pregunta
A prokaryotic cell has 80s ribosomes.
Respuesta
- True
- False
Pregunta 103
Pregunta
There are 7 functions of membrane proteins.
Respuesta
- True
- False
Pregunta 104
Pregunta
Diffusion is the passive movement of particles from a region of lower concentration to a region of higher concentration, as a result of random motion of particles.
Respuesta
- True
- False
Pregunta 105
Pregunta
Diffusion is the passive movement of particles from a region of [blank_start]lower[blank_end] concentration to a region of [blank_start]higher[blank_end] concentration, as a result of random motion of particles.
Respuesta
-
lower
-
higher
-
higher
-
lower
Pregunta 106
Pregunta
Which are passive?
Respuesta
-
Simple Diffusion
-
Facilitated Diffusion
-
Osmosis
-
Active Transport
Pregunta 107
Pregunta
The osmolarity of a solution is the number of moles of solute particles per unit of solution.
Respuesta
- True
- False
Pregunta 108
Pregunta
The greater the concentration of solutes the [blank_start]higher[blank_end] the osmolarity.
Respuesta
-
higher
-
lower
Pregunta 109
Pregunta
% change= {[blank_start]final mass - initial mass[blank_end]}/ initial mass x 100
Respuesta
-
final mass - initial mass
Pregunta 110
Pregunta
Active transport is the movement of substances across membranes, against the concentration gradient, using ATP.
Respuesta
- True
- False
Pregunta 111
Pregunta
Osmosis is the passive movement of [blank_start]water[blank_end] molecules from an area of [blank_start]low[blank_end] solute concentration to an area of [blank_start]high[blank_end] solute concentration across a partially permeable membrane until equilibrium is reached.
Respuesta
-
water
-
solute
-
low
-
high
-
high
-
low
Pregunta 112
Pregunta
[blank_start]Exocytosis[blank_end] is the process in which the vesicles fuse with the plasma membrane and the contents of the vesicles are expelled into the cell and the membrane flattens out again.
Respuesta
-
Exocytosis
-
Endocytosis
Pregunta 113
Pregunta
[blank_start]Endocytosis[blank_end] is the when the part of the plasma membrane can be pinched off to create a vesicle containing some material from outside the cell.
Respuesta
-
Endocytosis
-
Exocytosis
Pregunta 114
Pregunta
Symbiosis is two different organisms living together.
Respuesta
- True
- False
Pregunta 115
Pregunta
A group of proteins is called a [blank_start]cyclins[blank_end] and is used to ensure that tasks are performed at the correct time and that the cell moves on to the next stage of the cycle when its appropriate.
Respuesta
-
cyclins
Pregunta 116
Pregunta
Cyclins control the cell cycle and ensure that cells divide when new cells are needed, but not at other times.
Respuesta
- True
- False
Pregunta 117
Pregunta
Oncogenesis is the formation of tumors.
Respuesta
- True
- False
Pregunta 118
Pregunta
The spreading of cells to form tumors in a different part of the body is known as [blank_start]metastasis[blank_end].
Respuesta
-
metastasis
Pregunta 119
Pregunta
There is a [blank_start]positive[blank_end] correlation between cigarette smoking and the death rate due to cancer.
Respuesta
-
positive
Pregunta 120
Pregunta
Tobacco smoke are mutagenic and therefore [blank_start]carcinogenic[blank_end].
Respuesta
-
carcinogenic
Pregunta 121
Pregunta
For what purpose is the enzyme lactase useful?
Respuesta
-
Production of lactose-free milk so that more people can consume dairy products.
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As a dietary supplement to aid in protein digestion of milk.
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For use in coagulation milk proteins to make cheese.
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To improve protein consumption in developing countries that lack milk.
Pregunta 122
Pregunta
In a cell, what is the effect of a large surface area to volume ratio?
Respuesta
-
Slower rate of exchange of waste material.
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Faster heat loss.
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Faster rate of mitosis.
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Slower intake of food
Pregunta 123
Respuesta
-
Amino Acid
-
Peptide bond
-
RIbose
-
Glucose
Pregunta 124
Pregunta
Which organelles have a transport function?
Respuesta
-
Ribosome and Golgi apparatus
-
Golgi apparatus and endoplasmic reticulum
-
Mitochondrion and endoplasmic reticulum
-
Mitochondrion and ribosome
Pregunta 125
Pregunta
What is the difference between galactose and lactose?
Respuesta
-
Lactose is a disaccharide and galactose is a monosaccharide.
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Lactose is the product of anaerobic respiration in humans and galactose is the product of anaerobic respiration in yeast.
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Lactose is an enzyme and galactose is a hormone.
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Galactose is a sugar found in milk but lactose is not found in milk
Pregunta 126
Pregunta
In an electron micrograph, a DNA molecule appears 1 mm wide. The magnification of the micrograph is 500,000. What is the width of the DNA molecule.
Respuesta
-
0.5 nm
-
2 nm
-
0.5 micro m
-
2 micro m
Pregunta 127
Pregunta
What is a function of the bacterial cell wall?
Respuesta
-
Absorption of glucose by active transport.
-
Exchange of plasmids between cells.
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Increasing the surface area for oxygen diffusion.
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Preventing internal pressures from bursting the cell.
Pregunta 128
Pregunta
Why do multicellular organisms have emergent properties?
Respuesta
-
They have more genes than unicellular organisms.
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Properties of unicellular organisms are enhanced by having many cells.
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All of their genes are expressed whereas unicellular organisms express only some.
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They show properties that can only result from the interaction of many cells.
Pregunta 129
Pregunta
How much energy is stored in 1kg of body fat compared to 1kg of glycogen?
Respuesta
-
Half as much.
-
Same amount
-
Twice as much
-
One tenth as much
Pregunta 130
Pregunta
What is the size range for the diameters of most plant and animal cells?
Respuesta
-
100nm to 1 micro m
-
1 micro m to 10 micro m
-
10 micro m to 100 micro m
-
100 micro m to 1 mm
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