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Biology Semester1 Exam

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Topics 1.1-2.4
Isha Raja
Quiz by Isha Raja, updated more than 1 year ago
Isha Raja
Created by Isha Raja over 8 years ago
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Resource summary

Question 1

Question
Which of the following do not occur during interphase
Answer
  • Replication
  • Translation
  • Cytokinesis
  • An increase in the number of mitochondria

Question 2

Question
What is the difference between galactose and lactose
Answer
  • 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

Question 3

Question
In a cell what is the effect of a large surface to volume ratio?
Answer
  • Slower rate of exchange of waste materials
  • Faster heat loss
  • Faster rate of mitosis
  • Slower intake of food

Question 4

Question
How can cells in a multicellular organism differentiate?
Answer
  • 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

Question 5

Question
What happens during the G2 stage of interphase
Answer
  • Homologous chromosomes pair
  • Synthesis of protiens
  • Homologous chromosomes separate
  • DNA replicates

Question 6

Question
Resolution is the ability to see two objects
Answer
  • As separate objects
  • As one object
  • In more detail
  • In less detail

Question 7

Question
The diameter of the drawing is 100mm. The actual image is 100um. What is the magnification of the drawing?
Answer
  • 0.001
  • 100
  • 400
  • 1000

Question 8

Question
What is the difference between plant and animal cells?
Answer
  • 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

Question 9

Question
How do prokaryotic cells divide?
Answer
  • By mitosis
  • By meiosis
  • By budding
  • By binary fission

Question 10

Question
What advantages does electron microscopy have over light microscopy?
Answer
  • Excellent resolution throughout magnification range
  • Biological material is easy to prepare and stain
  • Movement of living cells can be seen

Question 11

Question
What is the only membranous structure inside a prokaryotic cell?
Answer
  • Mesosome
  • Ribosome
  • Mitochondrion
  • RER

Question 12

Question
What are organelles?
Answer
  • 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

Question 13

Question
Which organelles have a transport function?
Answer
  • Ribosome and Golgi apparatus
  • Golgi apparatus and ER
  • Mitochondrion and ER
  • Mitochondrion and ribosome

Question 14

Question
Which functions of life are carried out by unicellular organisms?
Answer
  • 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

Question 15

Question
Which of the following characterises tissues?
Answer
  • 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

Question 16

Question
Which of the following explains how brain cells develop to carry out their functions?
Answer
  • 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

Question 17

Question
Label
Image:
07a65faa-ed02-4035-b965-4fa1bd85e3e1 (image/jpeg)
Answer
  • Cell Wall
  • Plama Membrane
  • Cytoplasm
  • Nucleoid

Question 18

Question
Label
Image:
e754c007-b3a2-4493-afaa-8a983f8b3aca (image/jpeg)
Answer
  • Mitochondria
  • Rough Endoplasmic Reticulium

Question 19

Question
Homeostasis is maintaining the conditions inside a cells within tolerable limits
Answer
  • True
  • False

Question 20

Question
Label
Image:
c0344d8b-b520-4466-991e-897a941b2ea8.gif (image/gif)
Answer
  • Endoplasmic Reticulum
  • Mitochondion
  • Nucleus
  • Cytoplasm
  • Golgi Apparatus
  • Lysosome
  • Ribosome

Question 21

Question
Label
Image:
2e17de1b-9e50-4ab3-9daf-686f143a1cdc (image/jpeg)
Answer
  • Plasma Membrane
  • Cell Wall
  • Cytoplasm
  • Vacuoles
  • Nucleuolus
  • Chloroplasts
  • Mitochondion
  • Centrioles

Question 22

Question
Label
Image:
46b2a083-a42e-4e26-bf16-7429c0cd7528 (image/jpeg)
Answer
  • Cell Wall
  • Plasma Membrane
  • Golgi Apparatus
  • Chloroplast
  • Large Vacuole
  • Mitochondion
  • Cytoplasm
  • Rough Endoplasmic Reticulum
  • Nucleus
  • Nuclear Membrane
  • Golgi Apparatus
  • Ribosomes

Question 23

Question
In active transport molecules pass through the following part of the cell membrane
Answer
  • Protein Channels
  • Phospholipid bilayer
  • Phosphate heads
  • Cholesterol tails

Question 24

Question
In the structure of the cell membrane, glycoproteins are
Answer
  • Carbohydrate chains attached to membrane proteins
  • Protein tails attached to phospholipids
  • Carbohydrate tails attached to phospholipids
  • Protein channels attached to cholestrol

Question 25

Question
Active transport is controlled by
Answer
  • The concentration gradient
  • Nature of transport substances
  • Amount of water
  • Amount of solute

Question 26

Question
In endocytosis vesicles formed around the engulfed particles are formed by
Answer
  • ER
  • Nuclear envelope
  • Lysosomes
  • Cell Membrane

Question 27

Question
Cells engaged in active transport have a high number of
Answer
  • Golgi Apparatus
  • Mitochondia
  • Lysosomes
  • Ribosomes

Question 28

Question
Pinocytic vesicles can be found in
Answer
  • Wheat cells
  • Potato cells
  • Liver cells
  • Bacteria

Question 29

Question
The thyroid gland can concentrate iodine to a level higher than that of the blood, this is an example of
Answer
  • Diffusion
  • Osmosis
  • Active Transport
  • Pinocytosis

Question 30

Question
In osmosis, water molecules can pass through selectively permeable membrane but not the solute because they are different in
Answer
  • Size
  • Kinetic energy
  • Speed
  • Concentration

Question 31

Question
If pieces of potato are placed in a hypotonic solution, they will
Answer
  • Shrink
  • Increase in Weight
  • Decrease in Weight
  • Stay the same

Question 32

Question
Label
Image:
622335eb-6944-4841-87a6-fae23f4fc9c0 (image/jpeg)
Answer
  • Polar (hydrophilic) head
  • Non polar (hydrophobic) tail
  • Integral protein
  • Glycoprotein
  • Pump/Channel protein
  • Cholesterol
  • Peripheral protein
  • Fluid Mosaic Model

Question 33

Question
Gaseous exchange occurs by
Answer
  • Osmosis
  • Diffusion
  • Active Transport
  • Pinocytosis

Question 34

Question
Label cell cycle
Image:
ecc3a325-ebce-42a3-9776-60e5de1ea76a.gif (image/gif)
Answer
  • G1
  • S
  • G2
  • Interphase
  • Cell Division
  • Mitosis
  • Prophase
  • Metaphase
  • Anaphase
  • Telophase
  • Cytokinesis

Question 35

Question
Label
Image:
6e0c9fb9-13b8-4c3a-a422-eebccc1f0494.gif (image/gif)
Answer
  • Anaphase
  • Interphase
  • Metaphase
  • Prophase
  • Telophase

Question 36

Question
The longest phase of the cell cycle
Answer
  • Prophase
  • Interphase
  • Metaphase
  • Mitosis

Question 37

Question
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.
Answer
  • enlarges
  • DNA
  • replicate
  • longest
  • prophase
  • condense
  • nucleolus
  • spindle fibres
  • polar ends
  • metaphase
  • attach
  • equator
  • anaphase
  • move to polar ends
  • sister chromatids
  • telophase
  • different

Question 38

Question
Label the phases
Image:
631aedb3-904a-46b7-ab29-49c78aa56e7a (image/jpeg)
Answer
  • Metaphase
  • Anaphase
  • Anaphase
  • Interphase
  • Prophase
  • Prophase
  • Cytokinesis

Question 39

Question
Mitotic Index= [blank_start]number of cells in mitosis[blank_end]/ [blank_start]total number of cells[blank_end]
Answer
  • number of cells in mitosis
  • total number of cells

Question 40

Question
Which process removes waste material of metabolism from the body?
Answer
  • Excretion
  • Nutrition
  • Reproduction
  • Respiration

Question 41

Question
What is a mutation?
Answer
  • 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

Question 42

Question
Which structure is only found in plant cells?
Answer
  • cell membrane
  • chloroplasts
  • cytoplasm
  • nucleus

Question 43

Question
Which process involves the release of energy from food substances in all living organisms?
Answer
  • Breathing
  • Nutrition
  • Respiration
  • Transpiration

Question 44

Question
What is a cytoplasm?
Answer
  • a fluid filled sac
  • a jelly like substance
  • a surrounding wall
  • a tiny green disc

Question 45

Question
What is an example of osmosis?
Answer
  • 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

Question 46

Question
What is an example of homeostasis?
Answer
  • Breathing oxygen
  • Regulation blood in glucose
  • Removing undigested food through the anus
  • Urinating to empty the bladder

Question 47

Question
Which organisms carry out respiration, growth, movement and excretion?
Answer
  • All animal and plants
  • Animals only
  • Arthropods and flowering plants only
  • Plants only

Question 48

Question
Osmosis is defined as the diffusion of water molecules
Answer
  • 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

Question 49

Question
What is an Organ?
Answer
  • 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

Question 50

Question
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.
Answer
  • cell theory
  • living
  • smallest possible
  • pre-existing

Question 51

Question
What is a cell?
Answer
  • 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

Question 52

Question
Magnification= [blank_start]scale bar length[blank_end]/[blank_start]actual object scale bar length[blank_end]
Answer
  • scale bar length
  • actual object scale bar length

Question 53

Question
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.
Answer
  • cellulose
  • plasma membrane
  • osmosis
  • bursting

Question 54

Question
[blank_start]Plasma membranes[blank_end] surrounds the cell and [blank_start]regulates[blank_end] what enters and leaves the cell.
Answer
  • regulates
  • Plasma membranes

Question 55

Question
[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.
Answer
  • Binary fission
  • asexual
  • eukaryotic

Question 56

Question
The organelle that provides temporary storage of foods, enzymes and waste products is what?
Answer
  • Mitochondria
  • Vacuole
  • Chloroplast
  • Golgi apparatus

Question 57

Question
Cell wall, centrioles, lysosome, plastids are all organelles found in plant cells.
Answer
  • True
  • False

Question 58

Question
Which of the following are true for Eukaryote cells?
Answer
  • A naked loop of DNA
  • Double nucleur membrane called the nucleur envelope
  • 80s Ribosomes
  • Mitochondria

Question 59

Question
Which of the following are true for Prokaryotic cells?
Answer
  • Naked loop of DNA
  • 80s Ribosomes
  • Mitochondria
  • Internal membranes

Question 60

Question
What are sister chromatids?
Answer
  • Two separate identical chromosomes
  • Two related chromosomes
  • Two identical halves of a chromosome tied together
  • None of these

Question 61

Question
Which type of cell does a cell plate form during cytokinesis?
Answer
  • Animal cell
  • Plant cell
  • Protist cell
  • Bacterial cell

Question 62

Question
Sister chromatids are joined together by which of the following?
Answer
  • Centrosome
  • Centromere
  • Spindle
  • Kinetochore

Question 63

Question
Which of the following do animal cells have that plant cells do not have?
Answer
  • Spindle fibers
  • Poles
  • Microtubules
  • Centrioles

Question 64

Question
Diploids are [blank_start]two sets[blank_end] of chromosomes.
Answer
  • two sets

Question 65

Question
Which of the following is a function of cellulose in plants?
Answer
  • Storage of fate
  • Formation of mitochondria
  • Storage of energy
  • Formation of cell walls

Question 66

Question
What is the difference between a cell the G1 phase and a cell in a G2 phase of a cell cycle?
Answer
  • 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

Question 67

Question
Water rises in capillaries due to
Answer
  • Adhesion only
  • Cohesion only
  • Adhesion and Cohesion
  • Evaporation

Question 68

Question
Insects can walk on the surface of water due to
Answer
  • Adhesion
  • Cohesion
  • Adhesion and cohesion
  • Evaporation

Question 69

Question
Ice floats on the surface of water because of
Answer
  • Expansion
  • Contraction
  • Evaporation
  • Surface Tension

Question 70

Question
Water molecules are attached together by
Answer
  • Condensation
  • Hydrolysis
  • Hydrogen bonds
  • Covelent bonds

Question 71

Question
In evaporation of water
Answer
  • Hydrogen bonds are broken
  • Hydrogen bonds are formed
  • Covalent bonds are broken
  • Covalent bonds are formed

Question 72

Question
In a solid state a water molecule is attached to the following number of other water molecules
Answer
  • 1
  • 2
  • 3
  • 4

Question 73

Question
Water resists increase in temperature because the gained heat is spent in
Answer
  • Breaking hydrogen bonds
  • Forming hydrogen bonds
  • Breaking covalent bonds
  • Forming covalent bonds

Question 74

Question
Water is a polar molecule with
Answer
  • 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

Question 75

Question
A polysaccharide made of glucose molecules has the following formula
Answer
  • C5H10O5
  • 5CH12O6
  • C30H60O30
  • D30H52O26

Question 76

Question
A polysaccharide with 20 glucose units has the following number of glycosidic bonds
Answer
  • 5
  • 6
  • 19
  • 20

Question 77

Question
Digestion involves
Answer
  • Condensation
  • Hydrolisis
  • Polymerization
  • Dehydration synthesis

Question 78

Question
Glucose functions is
Answer
  • Cellulose
  • Lignin
  • Starch
  • Glycogen

Question 79

Question
How many amino acids does a polypeptide with 6 peptide bonds have
Answer
  • 3
  • 4
  • 5
  • 7

Question 80

Question
A fat molecule is made of
Answer
  • Carbon, hydrogen and oxygen
  • 3 fatty acids and glycerin
  • One sugar and 3 fatty acids
  • More than one gycerol

Question 81

Question
Identify this molecule
Image:
aa4ea3a4-8fab-4bc9-adc3-eb4763f96820.gif (image/gif)
Answer
  • Ribose

Question 82

Question
Identify compound and label parts
Image:
534592d5-e8d6-426b-9a4b-919b4faebac5.gif (image/gif)
Answer
  • Variable group (R)
  • Amine group
  • Triglyceride

Question 83

Question
Identify
Image:
744107ca-2efe-4cc8-9957-bcd22d17188a (image/png)
Answer
  • Glycerol

Question 84

Question
Identify
Image:
ead61539-a732-4ec8-bd5b-507fa5c2380b (image/png)
Answer
  • Amino Acid

Question 85

Question
Identify
Image:
b37b5520-fea9-41a3-a049-f66875a87855.gif (image/gif)
Answer
  • Dipeptide

Question 86

Question
A skeletal muscle is a exception to the cell theory because it is multinucleate (contains hundreds of nuclei)
Answer
  • True
  • False

Question 87

Question
Giant algae is an exception to the cell theory as it has many cells and they contain many nucleus.
Answer
  • True
  • False

Question 88

Question
A unicellular organism consists of many cells and can carry out all the functions of life.
Answer
  • True
  • False

Question 89

Question
As a cell grows larger its surface area to volume ratio becomes [blank_start]smaller[blank_end].
Answer
  • smaller
  • larger
  • wider
  • shorter

Question 90

Question
Different groups of cells become specialised for different functions by the process of differentiation in unicellular organisms.
Answer
  • True
  • False

Question 91

Question
The whole is greater than the sum of its parts: [blank_start]emergent properties[blank_end]
Answer
  • emergent properties
  • differentiation

Question 92

Question
Stem cells have the ability to divide and differentiate along different pathways.
Answer
  • True
  • False

Question 93

Question
Human embryos consist entirely of stem cells in their early stages.
Answer
  • True
  • False

Question 94

Question
In favour of therapeutic use of stem cells is:
Answer
  • 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.

Question 95

Question
The [blank_start]shorter[blank_end] the wave length the higher the resolution.
Answer
  • shorter
  • longer

Question 96

Question
The chloroplast carries out photosynthesis.
Answer
  • True
  • False

Question 97

Question
The plasma membrane prevent the cell bursting/shrinking during osmosis.
Answer
  • True
  • False

Question 98

Question
The cell wall controls entry and exit of substances.
Answer
  • True
  • False

Question 99

Question
The following are compartmentalised (membrane-bound) organelles:
Answer
  • Nucleus
  • Plasmid
  • Ribosomes
  • Mitochondria
  • Chloroplasts

Question 100

Question
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.
Answer
  • True
  • False

Question 101

Question
[blank_start]Binary fission[blank_end] is the splitting of two cells and the DNA is replicated identically.
Answer
  • Binary fission
  • Mitosis
  • Meiosis
  • Cell Division

Question 102

Question
A prokaryotic cell has 80s ribosomes.
Answer
  • True
  • False

Question 103

Question
There are 7 functions of membrane proteins.
Answer
  • True
  • False

Question 104

Question
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.
Answer
  • True
  • False

Question 105

Question
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.
Answer
  • lower
  • higher
  • higher
  • lower

Question 106

Question
Which are passive?
Answer
  • Simple Diffusion
  • Facilitated Diffusion
  • Osmosis
  • Active Transport

Question 107

Question
The osmolarity of a solution is the number of moles of solute particles per unit of solution.
Answer
  • True
  • False

Question 108

Question
The greater the concentration of solutes the [blank_start]higher[blank_end] the osmolarity.
Answer
  • higher
  • lower

Question 109

Question
% change= {[blank_start]final mass - initial mass[blank_end]}/ initial mass x 100
Answer
  • final mass - initial mass

Question 110

Question
Active transport is the movement of substances across membranes, against the concentration gradient, using ATP.
Answer
  • True
  • False

Question 111

Question
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.
Answer
  • water
  • solute
  • low
  • high
  • high
  • low

Question 112

Question
[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.
Answer
  • Exocytosis
  • Endocytosis

Question 113

Question
[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.
Answer
  • Endocytosis
  • Exocytosis

Question 114

Question
Symbiosis is two different organisms living together.
Answer
  • True
  • False

Question 115

Question
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.
Answer
  • cyclins

Question 116

Question
Cyclins control the cell cycle and ensure that cells divide when new cells are needed, but not at other times.
Answer
  • True
  • False

Question 117

Question
Oncogenesis is the formation of tumors.
Answer
  • True
  • False

Question 118

Question
The spreading of cells to form tumors in a different part of the body is known as [blank_start]metastasis[blank_end].
Answer
  • metastasis

Question 119

Question
There is a [blank_start]positive[blank_end] correlation between cigarette smoking and the death rate due to cancer.
Answer
  • positive

Question 120

Question
Tobacco smoke are mutagenic and therefore [blank_start]carcinogenic[blank_end].
Answer
  • carcinogenic

Question 121

Question
For what purpose is the enzyme lactase useful?
Answer
  • Production of lactose-free milk so that more people can consume dairy products.
  • As a dietary supplement to aid in protein digestion of milk.
  • For use in coagulation milk proteins to make cheese.
  • To improve protein consumption in developing countries that lack milk.

Question 122

Question
In a cell, what is the effect of a large surface area to volume ratio?
Answer
  • Slower rate of exchange of waste material.
  • Faster heat loss.
  • Faster rate of mitosis.
  • Slower intake of food

Question 123

Question
Label
Image:
51099ddd-18ec-4694-a0fd-899444c8a357 (image/png)
Answer
  • Amino Acid
  • Peptide bond
  • RIbose
  • Glucose

Question 124

Question
Which organelles have a transport function?
Answer
  • Ribosome and Golgi apparatus
  • Golgi apparatus and endoplasmic reticulum
  • Mitochondrion and endoplasmic reticulum
  • Mitochondrion and ribosome

Question 125

Question
What is the difference between galactose and lactose?
Answer
  • 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

Question 126

Question
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.
Answer
  • 0.5 nm
  • 2 nm
  • 0.5 micro m
  • 2 micro m

Question 127

Question
What is a function of the bacterial cell wall?
Answer
  • Absorption of glucose by active transport.
  • Exchange of plasmids between cells.
  • Increasing the surface area for oxygen diffusion.
  • Preventing internal pressures from bursting the cell.

Question 128

Question
Why do multicellular organisms have emergent properties?
Answer
  • They have more genes than unicellular organisms.
  • Properties of unicellular organisms are enhanced by having many cells.
  • All of their genes are expressed whereas unicellular organisms express only some.
  • They show properties that can only result from the interaction of many cells.

Question 129

Question
How much energy is stored in 1kg of body fat compared to 1kg of glycogen?
Answer
  • Half as much.
  • Same amount
  • Twice as much
  • One tenth as much

Question 130

Question
What is the size range for the diameters of most plant and animal cells?
Answer
  • 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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