Hope Enterprise University College

For Remedial class (Natural science)

Biology questions on unit three
Read the following questions carefully and choose the best answer from the given
alternative.
1. The organelle which is present only in animal cells is;
A. Cell membrane B. Lysosome C. Chloroplast D. Vacuole
2. What is the important function of ribosome in the cell?
A. Protein synthesis B. protein packaging C. Remove debris D. Lipid synthesis
3. Organelle which is found both in plants and animals cells and surrounded by double
membranes is;
A. Mitochondria B. Chloroplast C. Ribosome D. Endoplasmic reticulum
4. Cytoplasm contains all of the organelles except;
A. Cell wall B. mitochondria C. vacuole D. chloroplast
5. Cellular structure that is found in large quantities in WBCs and in other phagocyte cells is:
A. Ribosome B. Lysosome C. Golgi body D. nucleolus
6. Which of the following organelles is likely to be more abundant in active cell such as muscle
cell of human heart?
A. Lysosome B. Mitochondria C. Golgi body D. Vacuole
7. Which of the following organelle produces Lysosome?
A. Golgi body B. Mitochondria C. Nucleus D. Ribosome
8. Which of the following cellular structure works on modification and transport of proteins?
A. Endoplasmic reticulum B. Golgi body C. Vacuole D. Mitochondria
9. The cellular structure which manufactured the component of ribosome?
A. Nuclear envelope C. Rough endoplasmic reticulum
B. Nucleolus D. Smooth endoplasmic reticulum
10. The membrane of the chloroplast where light dependant reaction is carried in?
A. fluid stroma B. Grana C. Cristea D. Fluid matrix
12. Which of the following organelles is common to both plant and animal cells?
A. Cell wall B. Chloroplast C. Mitochondria D. Central vacuole
13. If a cell fails to form Lysosome, which of the following cellular functions will get disrupted
first?
A. Protein synthesis C. Removal of cellular debris
 B. Chromosome replication D. Transport across cell membrane
14. The role of cholesterol is to:
A. Increase the semi-liquid nature of the cell membrane C. Gives color to the membrane
B. Increase the flexibility of the membrane D. Increase the solid nature of the membrane
15. Which of the following eukaryotic cell organelles was a free living cell before eukaryotic
cells evolved?
A. Nucleus B. Ribosome C. Chloroplast D. Nucleolus
16. Which of the following cellular structures is possessed by all cells?
A. Cell membrane B. nucleus C. Cell wall D. Golgi apparatus
17. Which of the following structures is NOT present in animal cells?
A. Cell wall B. Nucleus C. Protoplasm D. nucleic acid
18. One of the following would be harder to see under the ordinary light microscope that is more
likely to the available in school laboratories?
A. Nucleus B. A bacterium C. A mitochondrion D. Ribosome
19. Which of the following is largely made up of phospholipids?
A. Cell wall B. Nucleus C. Cell membrane D. Chromosomes
20. If a suspension of a mixture of cellular organelles is spun in a centrifuge which organelle
settles to the bottom first?
A. Mitochondria B. Nuclei C. Chloroplast D. Ribosome
21. Which one of the following is the main constituent of biological membranes?
A. Phospholipids B. Glycoprotein C. Glycolipids D. Cholesterol
22. On which of the following organelles of the eukaryotic cell does protein synthesis take place?
A. The nucleus B. The ribosome C. The chloroplast D. The mitochondrion
23. Which molecule in the cell is the constituent of the gene?
A. Nucleic acid B. Protein C. Lipid D. Carbohydrate
24. According to Fluid mosaic model of plasma membrane, what does the word mosaic refer to?
A. Nature of fatty acid C. The movement of phospholipids
B. Arrangement of the protein D. The presence of cholesterol
25. Which of the following groups of organelles are only found in plant cell?
A. cell wall, ribosome and vacuole C. Cell wall, nucleus and plastids
B. Chloroplast, vacuole and cell wall, D. cell wall, centriole and chloroplast
26. Which one of the following terms refers to the diffusion of water across a selectively
permeable membrane?
A. Dialysis B. Osmosis C. Cohesion D. Cytoplasmic streaming
27. What happens to a human red blood cell when it is placed in a hypertonic solution?
A. It becomes turgid C. it might lose water and shrink
B. It might swell and burst D. It will remain unchanged
28.Which of the following statements is correct about the modern cell theory?
A. Cells come from nothing C. Cells come from pre- existing cells
B. Cells come from non-living material D .Cells arise by means of spontaneous
generation.
29. Which one of the following movement of particles requires expenditure of ATP?
A. Osmosis B. Facilitated diffusion C. Simple diffusion D. Active transport
30.Which one of the following is the main constituent of biological membranes?
A. Phospholipids B. Glycoproteins C. Glycolipids D. Cholesterols
31. Which one of the following unit is best to use for measuring the smallest cells and
organelles?
A. Micrometer. B. Milliliter C. Millimetre D. Nanometre
32. The movement of a substance in to a cell through the membrane by a vesicle is known as
A. Diffusion B. Phagocytosis C. passive transport D. Osmosis
33. The small size cells best correlates with
A. They are self-reproductive C. Their prokaryotic versus Eukaryotic nature.
B. An adequate surface area D. The fact that they come in multiple sizes.
for exchange of material
34. Cellular structure that is found in large quantities in WBCs and in other phagocyte cells is:
A. Ribosome’s B. Lysosome C. Golgi body C. nucleolus
35. Pieces of fresh potato are kept for some times in sugar solutions of 25%, 10%, 6% and
distilled water, which piece will gain the highest percentage of weight?
A. The one in 10% solution C. The one in 25% solution
B. The one in 6% solution D. The one in distilled
36. Which of the following modes of material transport across the cell membrane is not
governed by the concentration gradient of the transport material? is
A. Simple diffusion C. Osmosis
B. Facilitated diffusion D. Active transport
37. Which of the following happens if plant cell is placed in hypotonic condition?
A. Bursting B. Turgidity C. Plasmolysis D. Shrinking
38. What is the process by which water passes across the cell membrane?
A. Active transport B. Osmosis C. Facilitated diffusion D. Pinocytosis
39. Which one of the following is the correct sequence for the main processes of cellular
respiration?
A. Krebs cycle, electron transport system, glycolysis
B. Glycolysis, Krebs cycle, electron transport system
C. Electron transport system, Glycolysis, Krebs cycle
D. Glycolysis, Electron transport system, Krebs cycle
40. The energy currency of the cell is
A. NADH B. FADH2 C. ATP D. Pyruvate
41. Which of the following processes releases oxygen to the atmosphere?
A. Respiration B. Photosynthesis C. Transpiration D. Burning of fossil fuels
42. Choose the final electron acceptor in eh electron transport chain during aerobic respiration of
eukaryotic cells?
A. H2O B. O2 C. CO2 D. NADP
43. Where in the plant cell does the Krebs cycle (citric acid cycle) take place?
A. Nucleus B. Cytoplasm C. Mitochondrion D. Chloroplast
44. To which of the following molecules is most of the energy released during the Krebs cycle
transferred?
A. ATP B. FADH2 C. NADH D. ADP
45. Where in the mitochondria does the Krebs cycle take place?
A. On the cristae C. In the matrix
B. Between the outer and inner membrane D. On the inner surface of the outer
membrane
46. Which of the following defines ATP?
A. Adenine + adenosine + a phosphate C. Adenosine + ribose sugar + double
phosphate
B. Adenine+ ribose sugar + triple phosphate D. Nitrogen + sugar + monophosphate
47. Which process of respiration helps to release most of the energy stored in glucose?
A. Oxidative phosphorylation C. Fermentation reaction
B. Glycolysis D. Anaerobic reaction
48. Which of the following steps in cellular respiration can take place in the absence of oxygen?
A. Electron transport B. Glycolysis C. Krebs cycle D. Acetyl COA
formation
49. Which of the following pairs are both organelles concerned with energy transformation?
A. Nucleus and nucleolus C. Chloroplast and vacuole
B. Mitochondria and nucleus D. Chloroplast and mitochondria
50. What amount of net gain ATP does glycolysis provide to a cell?
A. 2 ATP molecules. B. 4 ATP molecules C. 18 ATP molecules. D. 36 ATP
molecules.
51. Which of the following is NOT one of the stages in cellular respiration?
A. Calvin cycle B. Glycolysis C. Electron transport D. Krebs cycle
52. Which of the following is true for cellular respiration?
A. Restricted to plant cells C. Restricted to animal cells
B. Occurs in all eukaryotic cells D. Occurs in prokaryotic cells only
53. How many moles of ATP will be generated as a result of the oxidation of one mole of
FADH2 in an actively respiring mitochondrion?
A. 0 B. 3 C. 2 D. 6
54. If there were no free oxygen to breath, which one of the following steps of the respiration
process can operate in our body?
A. Glycolysis B. Electron transport chain C. Krebs cycle D. link reaction
55. What is the source of the oxygen that is produced during the process of photosynthesis by
higher plants?
 A. CO2 B. H2O C. ATP D. Chlorophyll
56. What happens in the first reaction of the Kerbs cycle during energy transformation?
A. A 2-C compound is produced C. A 6-C compound is produced
B. A 4-C compound is produced D. A 5-C compound is produced
57. Which phosphate bond of the ATP is broken when the energy it contains is needed for
cellular activity?
A. The first bond B. The C- C bonds C. The second bond D. The third bond
58.Which of the following processes release energy that is used by the cell in its ATP
synthesis ?
A. Oxidation of glucose C. Synthesis of macromolecules
B. Conduction of nerve impulses D. Protein synthesis from amino acids
59. Which of the four stages of aerobic respiration of glucose takes place outside the
mitochondria?
A. The Krebs cycle B. Glycolysis C. Electron transport chain D. The link reaction
60. In athletics, why should long distance races be made at slower speed than short distance
running?
A. To allow aerobic respiration produce the ATP needed
B. To generate more ATP over very short period of time
C. To generate sufficient ATP through anaerobic respiration
D. To produce more lactic and ATP and avoid muscle fatigue
61. What do yeasts primarily achieve for their survival from the process of converting pyruvic
acid to alcohol during anaerobic respiration? They -----
A. from ATP B. recycle NAD C. produce oxygen D. Release carbon dioxide
62. What does the complete aerobic respiration of glucose by cells normally yields?
A. Alcohol, CO2, and 36 ATP C. CO2, H2O, and 36 ATP
B. Alcohol, CO2 and 2 ATP D. Lactic acid, CO2 and 2 ATP
63. What does the fermentation of glucose by yeast normally yield?
A. A. Lactic acid ,CO2, and 2ATP C. CO2,H2O,and 36 ATP
B. B. Alcohol, CO2,and 2ATP D. Alcohol,CO2 ,and 36ATP
64. Which one of the following is not produced at glycolysis?
A. Pyruvate B.ATP C.NADH D.FADH
65. If the cell uses 10 glucose molecules in glycolysis, how many pyruvate molecules will be
produced ?
A. 10 B. 20 C. 38 D. 40

By: Simegnew A.
April, 2015/ 2023