Questão 1
Questão
Which of the following do not occur during interphase
Questão 2
Questão
What is the difference between galactose and lactose
Responda
-
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
Questão 3
Questão
In a cell what is the effect of a large surface to volume ratio?
Questão 4
Questão
How can cells in a multicellular organism differentiate?
Responda
-
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
Questão 5
Questão
What happens during the G2 stage of interphase
Questão 6
Questão
Resolution is the ability to see two objects
Responda
-
As separate objects
-
As one object
-
In more detail
-
In less detail
Questão 7
Questão
The diameter of the drawing is 100mm. The actual image is 100um. What is the magnification of the drawing?
Questão 8
Questão
What is the difference between plant and animal cells?
Responda
-
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
Questão 9
Questão
How do prokaryotic cells divide?
Responda
-
By mitosis
-
By meiosis
-
By budding
-
By binary fission
Questão 10
Questão
What advantages does electron microscopy have over light microscopy?
Responda
-
Excellent resolution throughout magnification range
-
Biological material is easy to prepare and stain
-
Movement of living cells can be seen
Questão 11
Questão
What is the only membranous structure inside a prokaryotic cell?
Responda
-
Mesosome
-
Ribosome
-
Mitochondrion
-
RER
Questão 12
Questão
What are organelles?
Responda
-
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
Questão 13
Questão
Which organelles have a transport function?
Questão 14
Questão
Which functions of life are carried out by unicellular organisms?
Responda
-
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
Questão 15
Questão
Which of the following characterises tissues?
Responda
-
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
Questão 16
Questão
Which of the following explains how brain cells develop to carry out their functions?
Responda
-
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
Questão 17
Responda
-
Cell Wall
-
Plama Membrane
-
Cytoplasm
-
Nucleoid
Questão 18
Questão 19
Questão
Homeostasis is maintaining the conditions inside a cells within tolerable limits
Questão 20
Responda
-
Endoplasmic Reticulum
-
Mitochondion
-
Nucleus
-
Cytoplasm
-
Golgi Apparatus
-
Lysosome
-
Ribosome
Questão 21
Responda
-
Plasma Membrane
-
Cell Wall
-
Cytoplasm
-
Vacuoles
-
Nucleuolus
-
Chloroplasts
-
Mitochondion
-
Centrioles
Questão 22
Questão 23
Questão
In active transport molecules pass through the following part of the cell membrane
Responda
-
Protein Channels
-
Phospholipid bilayer
-
Phosphate heads
-
Cholesterol tails
Questão 24
Questão
In the structure of the cell membrane, glycoproteins are
Responda
-
Carbohydrate chains attached to membrane proteins
-
Protein tails attached to phospholipids
-
Carbohydrate tails attached to phospholipids
-
Protein channels attached to cholestrol
Questão 25
Questão
Active transport is controlled by
Questão 26
Questão
In endocytosis vesicles formed around the engulfed particles are formed by
Responda
-
ER
-
Nuclear envelope
-
Lysosomes
-
Cell Membrane
Questão 27
Questão
Cells engaged in active transport have a high number of
Responda
-
Golgi Apparatus
-
Mitochondia
-
Lysosomes
-
Ribosomes
Questão 28
Questão
Pinocytic vesicles can be found in
Responda
-
Wheat cells
-
Potato cells
-
Liver cells
-
Bacteria
Questão 29
Questão
The thyroid gland can concentrate iodine to a level higher than that of the blood, this is an example of
Responda
-
Diffusion
-
Osmosis
-
Active Transport
-
Pinocytosis
Questão 30
Questão
In osmosis, water molecules can pass through selectively permeable membrane but not the solute because they are different in
Responda
-
Size
-
Kinetic energy
-
Speed
-
Concentration
Questão 31
Questão
If pieces of potato are placed in a hypotonic solution, they will
Responda
-
Shrink
-
Increase in Weight
-
Decrease in Weight
-
Stay the same
Questão 32
Questão 33
Questão
Gaseous exchange occurs by
Responda
-
Osmosis
-
Diffusion
-
Active Transport
-
Pinocytosis
Questão 34
Responda
-
G1
-
S
-
G2
-
Interphase
-
Cell Division
-
Mitosis
-
Prophase
-
Metaphase
-
Anaphase
-
Telophase
-
Cytokinesis
Questão 35
Responda
-
Anaphase
-
Interphase
-
Metaphase
-
Prophase
-
Telophase
Questão 36
Questão
The longest phase of the cell cycle
Responda
-
Prophase
-
Interphase
-
Metaphase
-
Mitosis
Questão 37
Questão
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.
Responda
-
enlarges
-
DNA
-
replicate
-
longest
-
prophase
-
condense
-
nucleolus
-
spindle fibres
-
polar ends
-
metaphase
-
attach
-
equator
-
anaphase
-
move to polar ends
-
sister chromatids
-
telophase
-
different
Questão 38
Responda
-
Metaphase
-
Anaphase
-
Anaphase
-
Interphase
-
Prophase
-
Prophase
-
Cytokinesis
Questão 39
Questão
Mitotic Index= [blank_start]number of cells in mitosis[blank_end]/ [blank_start]total number of cells[blank_end]
Questão 40
Questão
Which process removes waste material of metabolism from the body?
Responda
-
Excretion
-
Nutrition
-
Reproduction
-
Respiration
Questão 41
Questão
What is a mutation?
Responda
-
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
Questão 42
Questão
Which structure is only found in plant cells?
Responda
-
cell membrane
-
chloroplasts
-
cytoplasm
-
nucleus
Questão 43
Questão
Which process involves the release of energy from food substances in all living organisms?
Responda
-
Breathing
-
Nutrition
-
Respiration
-
Transpiration
Questão 44
Questão
What is a cytoplasm?
Responda
-
a fluid filled sac
-
a jelly like substance
-
a surrounding wall
-
a tiny green disc
Questão 45
Questão
What is an example of osmosis?
Responda
-
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
Questão 46
Questão
What is an example of homeostasis?
Responda
-
Breathing oxygen
-
Regulation blood in glucose
-
Removing undigested food through the anus
-
Urinating to empty the bladder
Questão 47
Questão
Which organisms carry out respiration, growth, movement and excretion?
Questão 48
Questão
Osmosis is defined as the diffusion of water molecules
Responda
-
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
Questão 49
Questão
What is an Organ?
Responda
-
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
Questão 50
Questão
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.
Responda
-
cell theory
-
living
-
smallest possible
-
pre-existing
Questão 51
Responda
-
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
Questão 52
Questão
Magnification= [blank_start]scale bar length[blank_end]/[blank_start]actual object scale bar length[blank_end]
Questão 53
Questão
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.
Responda
-
cellulose
-
plasma membrane
-
osmosis
-
bursting
Questão 54
Questão
[blank_start]Plasma membranes[blank_end] surrounds the cell and [blank_start]regulates[blank_end] what enters and leaves the cell.
Responda
-
regulates
-
Plasma membranes
Questão 55
Questão
[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.
Responda
-
Binary fission
-
asexual
-
eukaryotic
Questão 56
Questão
The organelle that provides temporary storage of foods, enzymes and waste products is what?
Responda
-
Mitochondria
-
Vacuole
-
Chloroplast
-
Golgi apparatus
Questão 57
Questão
Cell wall, centrioles, lysosome, plastids are all organelles found in plant cells.
Questão 58
Questão
Which of the following are true for Eukaryote cells?
Questão 59
Questão
Which of the following are true for Prokaryotic cells?
Responda
-
Naked loop of DNA
-
80s Ribosomes
-
Mitochondria
-
Internal membranes
Questão 60
Questão
What are sister chromatids?
Questão 61
Questão
Which type of cell does a cell plate form during cytokinesis?
Responda
-
Animal cell
-
Plant cell
-
Protist cell
-
Bacterial cell
Questão 62
Questão
Sister chromatids are joined together by which of the following?
Responda
-
Centrosome
-
Centromere
-
Spindle
-
Kinetochore
Questão 63
Questão
Which of the following do animal cells have that plant cells do not have?
Responda
-
Spindle fibers
-
Poles
-
Microtubules
-
Centrioles
Questão 64
Questão
Diploids are [blank_start]two sets[blank_end] of chromosomes.
Questão 65
Questão
Which of the following is a function of cellulose in plants?
Questão 66
Questão
What is the difference between a cell the G1 phase and a cell in a G2 phase of a cell cycle?
Responda
-
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
Questão 67
Questão
Water rises in capillaries due to
Responda
-
Adhesion only
-
Cohesion only
-
Adhesion and Cohesion
-
Evaporation
Questão 68
Questão
Insects can walk on the surface of water due to
Responda
-
Adhesion
-
Cohesion
-
Adhesion and cohesion
-
Evaporation
Questão 69
Questão
Ice floats on the surface of water because of
Responda
-
Expansion
-
Contraction
-
Evaporation
-
Surface Tension
Questão 70
Questão
Water molecules are attached together by
Responda
-
Condensation
-
Hydrolysis
-
Hydrogen bonds
-
Covelent bonds
Questão 71
Questão
In evaporation of water
Responda
-
Hydrogen bonds are broken
-
Hydrogen bonds are formed
-
Covalent bonds are broken
-
Covalent bonds are formed
Questão 72
Questão
In a solid state a water molecule is attached to the following number of other water molecules
Questão 73
Questão
Water resists increase in temperature because the gained heat is spent in
Responda
-
Breaking hydrogen bonds
-
Forming hydrogen bonds
-
Breaking covalent bonds
-
Forming covalent bonds
Questão 74
Questão
Water is a polar molecule with
Responda
-
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
Questão 75
Questão
A polysaccharide made of glucose molecules has the following formula
Responda
-
C5H10O5
-
5CH12O6
-
C30H60O30
-
D30H52O26
Questão 76
Questão
A polysaccharide with 20 glucose units has the following number of glycosidic bonds
Questão 77
Questão
Digestion involves
Responda
-
Condensation
-
Hydrolisis
-
Polymerization
-
Dehydration synthesis
Questão 78
Questão
Glucose functions is
Responda
-
Cellulose
-
Lignin
-
Starch
-
Glycogen
Questão 79
Questão
How many amino acids does a polypeptide with 6 peptide bonds have
Questão 80
Questão
A fat molecule is made of
Responda
-
Carbon, hydrogen and oxygen
-
3 fatty acids and glycerin
-
One sugar and 3 fatty acids
-
More than one gycerol
Questão 81
Questão
Identify this molecule
Questão 82
Questão
Identify compound and label parts
Responda
-
Variable group (R)
-
Amine group
-
Triglyceride
Questão 83
Questão 84
Questão 85
Questão 86
Questão
A skeletal muscle is a exception to the cell theory because it is multinucleate (contains hundreds of nuclei)
Questão 87
Questão
Giant algae is an exception to the cell theory as it has many cells and they contain many nucleus.
Questão 88
Questão
A unicellular organism consists of many cells and can carry out all the functions of life.
Questão 89
Questão
As a cell grows larger its surface area to volume ratio becomes [blank_start]smaller[blank_end].
Responda
-
smaller
-
larger
-
wider
-
shorter
Questão 90
Questão
Different groups of cells become specialised for different functions by the process of differentiation in unicellular organisms.
Questão 91
Questão
The whole is greater than the sum of its parts: [blank_start]emergent properties[blank_end]
Responda
-
emergent properties
-
differentiation
Questão 92
Questão
Stem cells have the ability to divide and differentiate along different pathways.
Questão 93
Questão
Human embryos consist entirely of stem cells in their early stages.
Questão 94
Questão
In favour of therapeutic use of stem cells is:
Responda
-
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.
Questão 95
Questão
The [blank_start]shorter[blank_end] the wave length the higher the resolution.
Questão 96
Questão
The chloroplast carries out photosynthesis.
Questão 97
Questão
The plasma membrane prevent the cell bursting/shrinking during osmosis.
Questão 98
Questão
The cell wall controls entry and exit of substances.
Questão 99
Questão
The following are compartmentalised (membrane-bound) organelles:
Responda
-
Nucleus
-
Plasmid
-
Ribosomes
-
Mitochondria
-
Chloroplasts
Questão 100
Questão
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.
Questão 101
Questão
[blank_start]Binary fission[blank_end] is the splitting of two cells and the DNA is replicated identically.
Responda
-
Binary fission
-
Mitosis
-
Meiosis
-
Cell Division
Questão 102
Questão
A prokaryotic cell has 80s ribosomes.
Questão 103
Questão
There are 7 functions of membrane proteins.
Questão 104
Questão
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.
Questão 105
Questão
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.
Responda
-
lower
-
higher
-
higher
-
lower
Questão 106
Questão
Which are passive?
Responda
-
Simple Diffusion
-
Facilitated Diffusion
-
Osmosis
-
Active Transport
Questão 107
Questão
The osmolarity of a solution is the number of moles of solute particles per unit of solution.
Questão 108
Questão
The greater the concentration of solutes the [blank_start]higher[blank_end] the osmolarity.
Questão 109
Questão
% change= {[blank_start]final mass - initial mass[blank_end]}/ initial mass x 100
Questão 110
Questão
Active transport is the movement of substances across membranes, against the concentration gradient, using ATP.
Questão 111
Questão
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.
Responda
-
water
-
solute
-
low
-
high
-
high
-
low
Questão 112
Questão
[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.
Questão 113
Questão
[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.
Questão 114
Questão
Symbiosis is two different organisms living together.
Questão 115
Questão
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.
Questão 116
Questão
Cyclins control the cell cycle and ensure that cells divide when new cells are needed, but not at other times.
Questão 117
Questão
Oncogenesis is the formation of tumors.
Questão 118
Questão
The spreading of cells to form tumors in a different part of the body is known as [blank_start]metastasis[blank_end].
Questão 119
Questão
There is a [blank_start]positive[blank_end] correlation between cigarette smoking and the death rate due to cancer.
Questão 120
Questão
Tobacco smoke are mutagenic and therefore [blank_start]carcinogenic[blank_end].
Questão 121
Questão
For what purpose is the enzyme lactase useful?
Responda
-
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.
Questão 122
Questão
In a cell, what is the effect of a large surface area to volume ratio?
Questão 123
Responda
-
Amino Acid
-
Peptide bond
-
RIbose
-
Glucose
Questão 124
Questão
Which organelles have a transport function?
Responda
-
Ribosome and Golgi apparatus
-
Golgi apparatus and endoplasmic reticulum
-
Mitochondrion and endoplasmic reticulum
-
Mitochondrion and ribosome
Questão 125
Questão
What is the difference between galactose and lactose?
Responda
-
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
Questão 126
Questão
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.
Responda
-
0.5 nm
-
2 nm
-
0.5 micro m
-
2 micro m
Questão 127
Questão
What is a function of the bacterial cell wall?
Responda
-
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.
Questão 128
Questão
Why do multicellular organisms have emergent properties?
Responda
-
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.
Questão 129
Questão
How much energy is stored in 1kg of body fat compared to 1kg of glycogen?
Responda
-
Half as much.
-
Same amount
-
Twice as much
-
One tenth as much
Questão 130
Questão
What is the size range for the diameters of most plant and animal cells?