Entrance examination for grade 12 from 1995 – 2011
Grade 11 Unit 4
Cell biology
1, Which of the following structures occupies the center of a mature plant cell?
A, Cytoplasm B, Nucleus C, Central vacuole D, Plastids
2, Which of the following organelles are absent in higher plant cells?
A, Plastids B, Centrioles C, Ribosome D, Mitochondria
3, Which cellular structures are responsible for autolysis or self-destruction?
A, Chromosomes B, Ribosomes C, Lysosomes D, Golgy apparatus
4, Which one of the following unicellular organism is prokaryote?
A, Amoeba B, Bacteria C, Euglena D, Paramecium
5, If tissue from sliced potato tuber are kept in sea water, which of the following is more likely to
happen?
A, The cell will take up water and burst B, The cell lose water and become flaccid
C, The cell become dry and impermeable D, The cells actively pump out salts
6, If the protoplasm shrinks away from the cell wall when a plant cell is bathed in a sugar solution, what
is the concentration of the solution relative to the protoplasm of the plant cell?
A, Hypertonic B, isotonic C, Hypotonic D, Isosmotic
7, Which of the following structure is missing in prokaryotic cell?
A, Cytoplasm B, Plasma membrane C, Nuclear membrane D, Nuclear material
8, What are the molecules found in the cell membrane that makes it more fluid?
A, Proteins and amino acids B, Saturated fatty acids and carbohydrates
C, Phosphates and hydrocarbons D, Unsaturated fatty acid and cholesterol
9, If 0.95 solutions is isotonic to certain animal cell, that animal cell will lose more water when kept in
which of the following solution?
A, 0.2% salt solution B, 1.0% salt solution C, 0’9% salt solution D, 1.5% salt solution
10, In which of the following type of cellular transportation across the cell membrane, do substances
move against their concentration gradient?
A, Osmosis B, Simple diffusion C, Facilitated diffusion D, Active transport
11, Which of the following organelles of eukaryotic cells is believed to be once an independent
prokaryotic cell?
A, Nucleus B, Chloroplast C, Endoplasmic reticulum D, Golgy apparatus
12, Choose the structure whose typical function is synthesis of protein
A, Nucleus B, Ribosome C, Vacuole D, Centriole
13, Which function is carried out by the golgy apparatus?
A, Protein synthesis B, Protein denaturation C, Digestion of protein D, Modification of protein
14, Which of the following term best describes plant cell that is full of water?
A, Flaccid B, Haemolysed C, Turgid D, Plasmolysed
15, Among the following which organelle is note found by a biological membrane?
A, Nucleus B, Chloroplast B, Ribosome D, Mitochondria
16, Which of the following is not found in the animal cell?
A, Nucleus B, Chloroplast C, Ribosome D, Mitochondrion
17, Lysosomes function in
A, Protein synthesis B, Processing and packaging C, Intracellular digestion D, Lipid synthesis
18, In which of the following organelles of the prokaryotic cell are enzymes synthesized?
A, Nuclei B, Mitochondria C, chloroplast D, Ribosomes
19, Which one of the following is part of eukaryotic plant cell that is devoid of DNA?
A, Nucleus B, Cytoplasmic fluid C, Mitochondria C, Chloroplast
20, Which one of the following organelles of the cell is involved in the energy release of eukaryotic cells?
A, Chloroplast B, endoplasmic reticulum C, Nucleus D, Mitochondria
21, Which one of the following term refers to the diffusion of water across a selectively permeable
membrane?
A, Dialysis B, Osmosis C, Cohesion D, Cytoplasmic streaming
22, Which of the following structures are structurally and evolutionary more related to prokaryotic cells?
A, Fungi and protozoa B, Higher plants and animals
C, Chloroplast and mitochondria D, Unicellular green algae and fungi
23, What is the process by which water passes across the cell membrane?
A, Active transport B, Osmosis C, Facilitated diffusion D, pinocytosis
24, Of the following constituents of protoplasm, which is inorganic in nature?
A, Starch B, Protein C, Water D, None of the above
25, When does hypotonic condition exist in the environment of the cell?
A, When there is equal concentration of solutes outside and inside the cell
B, when the solute concentration outside the cell is greater than inside the cell
C, When solute concentration inside the cell is greater than outside the cell
D, When the net movement of water is from the cell to outside of the environment
26, Which of the following is important to regulate entry and exit of materials into and out of the plant
cell?
A, Cell wall B, Cell membrane C, Nucleus D, Central vacuole
27, All the living components of the cell collectively known as what?
A, cytoplasm B, Nucleus D, Cell membrane D, Protoplasm
28, Which of the following is found in both plant and animal cells?
A, Cell wall B, chromoplast C, Chromosomes D, Leucoplasts
29, What happens to human red blood cell when it is placed in hypertonic solution?
A, it becomes turgid B, It might swells and burst
C, It might loss water and shrinks D, It will remain unchanged
30, Which organelle of cell has function of modifying protein for secretion?
A, Golgy body B, Ribosome C, Food vacuole D, Lysosome
31, If a piece of fresh potato are kept for some time in sugar solution of 20%, 10%, 5% and distilled
water, which piece will gain the highest percentage of weight?
A, The one in20% solution B, The one in 10% solution
C, The one in 5% solution D, The one in distilled water
32, To which category of enzymes do the digestive enzymes that break down food substances in the
human alimentary canal belong?
A, Intracellular enzymes B, Globular enzymes C, Extra cellular enzymes D, Fibrous enzymes
33, Which one of the following is largely made up of phospholipid?
A, Cell wall B, cell membrane C, Nucleus D, chromosome
34, Choose the name of the researchers /scientist who introduced the term cell for the first time?
A, Aristotle B, Anton van leuwenhoek C, Robert Hooke D, Robert Brown
35, Among the following discoveries in biology which one is the latest of all?
A, The law of heredity B, the cell theory
C, The double helix nature of the DNA C, The binomial system of nomenclature
36, Which of the following is a process by which cells take in fluid by means of vesicles?
A, Pinocytosis B, endocytosis C, Osmosis D, Phagocytosis
37, Which of the following structures divide the cytoplasm of plant cell into two halves?
A, Nuclear membrane B, Cell plate C, spindle D, Cleavage flow
38, which of the following organelles are likely to be more abundant in active cells such as muscle cells
of human heart?
A, Lysosome B, chromosome C, Mitochondria D, Golgy bodies
39, Which of the following pairs are both organelles concerned with energy transformation?
A, Nucleus and nucleolus B, Mitochondria and nucleus
C, Chloroplast and vacuole D, Chloroplast and mitochondria
40, Sodium ion passes from the region where they are at lower concentration to the region they are
found at higher concentration in human cells. This is an example of which of the following process?
A, Osmosis B, Passive transport C, Simple diffusion D, Active transport
41, Choose the structure that is usually present only in the cells of animals?
A, Vacuole B, Cell wall C, Nucleus D, Centrioles
42, Why is the leaves and the soft young stems of plants that have started witling become stiff again
when they are provided with water? This is because of:
A, Fast intake of minerals B, The cooling effect of water
C, Increased turgor pressure D, Increased rate of photosynthesis
43, Which of the following statement is in agreement with the modern cell theory?
A, Cells come from nothing B, Cells come from existing cells
C, Cells come from nonliving materials D, Cells arise by means of spontaneous generation
44, Which of the following ideas in the cell theories was combined by Rudolf Virchow?
A, All plans are made up of cells B, All animals are made up of cells
C, Cells are the structural unit of life D, Cells come from preexisting cells
45, Which of the following mode of material transport across the cell membrane is not governed by the
concentration gradient of the transported material?
A, Simple diffusion B, facilitated diffusion C, osmosis d, Active transport
46, Which means of particle transport requires input energy by the cell?
A, Simple diffusion B, Facilitated diffusion C, Osmosis D, Active transport
47, What is the term for the process by which organisms keep their internal conditions at a fairly
constant state?
A, Catabolism B, Evolution C, Homeostasis D, Photosynthesis
48, Which of the following requires expenditure of ATP?
A, Osmosis B, Facilitated diffusion C, Simple diffusion D, Endocytosis
49, Suppose we consider the hypothetical cells( designed A, B, C and D ) having cubic shapes with their
sides measuring 2, 4, 6 and 8 arbitrary units respectively which of these cells has the largest surface
area to volume ratio?
A, Cell A B, cell B C, Cell C D, cell D
50, What type of molecules cannot pass across the cell membrane by simple diffusion?
A, Charged molecule B, Nonpolar molecule
C, Lipid soluble molecules D, Molecules of very small size
51, Suppose three potato cylinders are kept for some time in 15%, 8% and 4% sucrose solution,
respectively, and the fourth cylinder is kept in distilled water, which of the cylinder will be more flaccid?
A, The cylinder in 4% solution B, The cylinder in 8% solution
C, The cylinder in 15% solution D, The cylinder in distilled water
52, Which of the following is the main constituent of biological membrane?
A, Phospholipids B, Cholesterol C, Glycoprotein D, glycolipid
53, The main component of plant cell wall is
A, Starch B, cellulose C, Protein D, Chitin
54, Which of the following kingdom of life consisting of prokaryotic organisms?
A, Fungi B, Monera C, Protists D, Plantae
55, Which unit is best to use for measuring smallest cells and organelles?
A, Micrometer C, Millimeter C, Milliliter D, Nanometer
56, If the size of the cell increases, which one of the following gets smaller?
A, The volume of the cell B, the surface area of the cell
C, the surface area to volume ratio of the cell D, the volume to surface area of the cell
57, If a suspension of mixture of cellular organelles is spur in as centrifuge, which organelle settle to the
bottom first?
A, Mitochondria B, Nuclei C, Chloroplast d, ribosome
58, Which of the following is an important function of Golgy apparatus?
A, Protein synthesis B, Packaging of protein for export out of the cell
C, Removing of debris from the cell D, Storage of waste materials not needed by the cell
59, In which of the following features are eukaryotic cells distinguished from prokaryotic cells?
A, they have mitochondria C, Their nuclei lack membranes
C, they have no DNA D, They have smaller ribosomes
60, What will happen if human red blood cells are kept in hypotonic solution?
A, Lose water by osmosis and burst B, Lose water by osmosis and shrink
C, Take in water by osmosis, swells and burst D, take in watery by osmosis, swell and remain turgid
61, In which type of solution water potential more negative than in the cell?
A, Hypotonic B, hypertonic C, Isotonic D, equal solute an d solvent concentration
62, Which of the following paired organelles are membranes bound?
A, Ribosome and periosomes B, Chloroplast and ribosome
D, Mitochondria and ribosome D, Chloroplast and mitochondria
63, Most of the cell membranes primarily composed of which compounds?
A, Protein and lipid B, DNA and ATP C, Chitin and starch D, Nucleotides and amino acids
64, If the red blood cells shrink when placed in certain solution, what is the strength of the solution
relative to the strength of the protoplasm of the cell?
A, Hypotonic B, Isotonic C, hypertonic D, Isosmotic
65, Which of the following cell types can be rich in lysosome?
A, Red blood cell B, Nerve cell C, Phagocytic cells D, Muscle cells
66, One of the following would be harder to see under the ordinary light microscope that is more likely
to be available in school laboratories
Nucleus B, A bacterium C, Mitochondria D, ribosome
67, Which one of the following cellular forms did Robert Hooke observe under his crude microscope?
A, Bacteria B, Protozoa C, Yeast D, Empty cell wall
68,On which of the following organelles of the eukaryotic cells does protein synthesis takes place?
A, The nucleus B, The ribosome C, The chloroplast D, The mitochondrion
69, What is the general term for the part of protoplasm that lies outside the nucleus?
A, Cytosol C, Cytoplasm C, Central vacuole D, Plasma membrane
70, Choose the organism that belongs to the eukaryotic?
A, Bacteria B, blue green algae C, Amoeba D, virus
71, Which of the following structure is not present in animal cell?
A, Cell wall B, Nucleus C, Protoplasm D, Nucleic acid
72, Which of the following cellular structure is possessed by all cells?
A, Cell membrane B, Nucleus C, Cell wall D, Golgy apparatus
73, Which one of the following eukaryotic cell organelles was a free living cell before eukaryotic cells
evolved?
A, Nucleus B, Ribosome C, Chloroplast D, Nucleolus
74, Which of the following mechanisms move digested amino acids and glucose across the plasma
membrane of the cell lining the wall of the small intestine?
A, Osmosis B, Simple diffusion c, Facilitated diffusion d, Active transport
75, Which of the following is unnecessary for an object to be considered a living thing?
A, Ability to respond to the stimuli B, Ability to reproduce C, Ability to gown D, ability to move
76, If a cell fails to clear cellular debris, which one of its organelles is most likely not functioning?
A, Nucleus B, Mitochondria C, Endoplasmic reticulum D, Lysosome
77, Suppose a hypothetical cube shaped cell has sides of 10 micrometre, what is the surface area to
volume ratio of this cell?
A, 6: 10 B, 10: 10 C, C, 3:6 D, 4:8
78, Among the following identify the organelle in which nucleic acid is not found
A, Mitochondria B, Chloroplast C, ribosome d, Golgy apparatus
79, Which of the following solution does an animal cell undergo hemolysis?
A, In hypotonic solution B, in hypertonic solution
C, In isotonic solution D, In both hypotonic and hypertonic solution
80, Which of the following will happen if plant cell is kept in a solution that is strong than in protoplasm?
A, The cell will become turgid B, The central vacuolar will expand
C, The protoplasm will get plasmolysed D, The cell will swell and burst
81, Which of the following units of measurement is more convenient to express the size of cellular
organelle?
A, Meter B, Centimeter C, Millimeter D, Micrometer
82, Which of the following is not true about mitochondria and chloroplast?
A, Both contain chlorophyll B, Both contain nucleic acid
C, Both have double membrane D, Both transduce energy
83, Among the following scientists who contributes to the cell theory, identify the one who stated that a
cell can arise only from another cell like it?
A, Robert Hooke B, Theodor schwann C, Matthias D, Rudolf Virchow
84, What does it mean when biologists express the cell membrane as a unit membrane?
A, A cell is covered by a single membrane
B, A membrane is only one lipid layer thick
C, All cells have essentially similar membrane
D, A membrane is covered by a single layer of protein
85, Which of the following classes of molecule cannot pass easily across the cell membranes by simple
diffusion?
A, Small non polar molecules B, Lipid soluble molecules C, Non polar molecules D, Polar molecules
86, Which of the following mode of transport is used by the cells to move substances against their
concentration gradient?
A, Osmosis B, Simple diffusion C, facilitated diffusion D, Active transport
87, Which of the following factors determines the rate at which organelles settle out of cell homogenate
if spun in centrifuge?
A, Mass of the organelle B, Function of the organelle in the cell
C, Location of the organelle in the cell D, Thickness of the membrane covering the organelle
88, Which of the following will primarily happen if the enzyme in hew lysosome of the cell is defective?
A, Cellular debris will not be removed B, Chromosome replication will cease
C, ATP production will stop D, Diffusion process will stop
89, Of the following four cells whose surface area to volume ratio given, which cells can more
efficiently transport its needs of material across the cell surface?
A, 24:8 ratio B, 54: 27 ratio C, 96:64 ratio D, 150:125 ratio
90, What is the best term that expresses the movement of substances in cells against their
concentration gradient?
A, Active transport B, Passive transport C, osmosis D, diffusion
91, Who was the person that first observed living cells moving around when he examined drops of water
under microscope?
A, Robert Brown B, Robert Hooke C, Anton van leeuwemhoek D, Theodor Schewann
92, Which one of the following events happened before all the others?
A, The cell theory was proposed B, The protozoa were discovered
C, The compound microscope was invented D, the structure of DNA was described
93, Which of the following has a bigger size than all the others?
A, A ribosome taken from an animal cell B, A mitochondrion taken from a plant cell
C, A nerve cell taken from a human brain cell D, A glucose molecule taken from a plan cell
94, Which of the following parts of the plant cell is not living component of the cell?
A, Cell membrane B, Cell wall C, Cytoplasm D, Nucleus
95, According to fluid mosaic model of plasma membrane, what does the word mosaic refers to?
A, the hydrophilic property of fatty acid B, the bilayer nature of the membrane
C, The arrangement the proteins D, The movement of the phospholipids
96, What happens when a plant cell absorbs in more water?
A, Shrink B, Become turgid C, Become witted D, it swells and burst
97, Which of the following organelles is common to both plants and animals?
A, Cell wall B, Chloroplast C, Mitochondria D, Central vacuole
98, If cell fails to form lysosome, which of the following cellular functions will get disrupted first?
A, Protein synthesis B, Chromosomal replication
C, Removal of cellular debris D, Transport across cell membrane
99, For the substances to easily pass across the cells membrane by simple diffusion, which of the
following properties should it possess?
A, Large size B, Ability to dissolve in lipid C, Positive charge D, Negative charge
100, Which knowledge about cell biology did scientists discover after all the others?
A, The first understanding that living things are made up of cells
B, Knowledge about how chromosomes behave during mitosis
C, First understanding about the double helix structure of DNA
D, First understanding about DNA sequence in human genome
101, Who was the first person who believed to have seen live moving cells under a microscope?
A, Robert Hooke B, Rene Dutrochet C, Anton van Leeuwenhoek D, Theodor schwaann
102, Which of the following is lacking in prokaryotic cells?
A, cytosol B, ribosome C, DNA strand D, cellulose
103, Cells were seen using microscope by
A, Schleiden B, Robert Hooke C, Schwann D, Leeuwenhoek
104, Which of the following organelles settle out last when homogenized cells are centrifuged?
A, Chloroplast B, Nucleus C, Mitochondria D, ribosome
105, Through which process can inorganic ions from the soil be absorbed in to the root hairs?
A, Dehydration B, Diffusion C, Active transport D, Osmosis
106, Of the following models describing the nature of the cell membrane, which one was proposed
before all the others?
A, The sandwich model B, Fluid mosaic model
C, The unit membrane model D, The phospholipid bilayer model
107, Cell organelles that contain hydrolytic enzymes are called?
A, Perixosomes B, lysosomes C, Mesosomes D, Ribosomes
108, Which part of the cell makes necessary changes, packages and secretes protein?
A, Gollgy apparatus B, Endoplasmic reticulum
C, Mitochondria D, cell wall
109, The organelles of the cell which is concerned with the synthesis of lipid in addition to being
association with carbohydrate metabolism and detoxification is
A, Golgy body B, thylakoid membrane
C, Rough endoplasmic reticulum D, smooth endoplasmic reticulum
110, Which of the following is not a requirement for a molecule to directly diffuse across the cell
membrane?
A, Small size B, Non polarity C, Large size and polarity D, Lipid solubility
111, If homogenate eukaryotic cell is spun in a centrifuge, which of the cellular organelle settle out first?
A, Ribosome B, Nucleus C, Chloroplast D, Mitochondria
112, Which of the following is not function of lysosome?
A, Autophagy B, Autolysis ? C, Synthesis D, Digestion
113, Organelles in the cytoplasm that are known as power of the cell are?
A, Mitochondria B, Chloroplast C, Ribosome D, Cellulose
114, Through which of the following methods can blood be separated in to its cellular and fluid parts?
A, Separating funnel B, Centrifuging C, Factional distillation D, Simple distillation
115, Which of the following has the highest water potential than all the others?
A, Pure liquid B, different solution
C, Animal cells D, Different suspensions
116, Which of the following happens if nucleolus is missing in the cell?
A, The nuclear pole will be blocked
B, Ribosomal function will be disrupted
C, DNA synthesis will be enhanced
D, Endoplasmic reticulum will be unfolded
Answer
No. Answer No. Answer No. Answer No. Answer No. Answer
1 B 26 B 51 C 76 D 101 C
2 B 27 D 52 A 77 A 102 D
3 C 28 C 53 B 78 D 103 D
4 B 29 C 54 B 79 B 104 D
5 B 30 A 55 D 80 C 105 C
6 A 31 D 56 C 81 D 106 A
7 C 32 C 57 B 82 A 107 B
8 D 33 B 58 B 83 D 108 A
9 D 34 C 59 A 84 C 109 D
10 D 35 C 60 C 85 A 110 C
11 B 36 A 61 B 86 D 111 B
12 B 37 B 62 D 87 A 112 C
13 D 38 B 63 A 88 A 113 A
14 C 39 D 64 C 89 A 114 B
15 B 40 A 65 C 90 A 115 C
16 B 41 D 66 D 91 C 116 B
17 C 42 C 67 D 92 C 117
18 D 43 B 68 B 93 C 118
19 B 44 D 69 B 94 B 119
20 D 45 C 70 C 95 D 120
21 B 46 D 71 A 96 B 121
22 C 47 C 72 A 97 C 122
23 B 48 D 73 B 98 C 123
24 C 49 A 74 C 99 B 124
25 C 50 A 75 D 100 A 125
