Cell - the unit of life 1000+ MCQ with answer for SSC CHSL

1. The best material for study of structure of cell membrane is
A. RBC of human
B. RBC of frog
C. cheek cell of human
D. liver cell of rat
Answer : A

2. Which of these is wrongly matched?
A. Chloroplasts Chlorophyll
B. Elaioplasts Starch
C. Chromoplasts Carotenoids
D. Amyloplasts Carbohydrates
Answer : B

3. The cytoskeleton is a proteinaceous network of fibres in the cytoplasm. It is involved in
A. mechanical support.
B. motility.
C. maintenace of cell-shape.
D. all of the above
Answer : D

4. What would happen if lysosomes get ruptured in a cell?
A. Cell dies
B. Cell shrinks
C. Cell swell up
D. Nothing would happen
Answer : A

5. The fluidity of membranes in a plant in cold weather may be maintained by
A. increasing the number of phospholipids with unsaturated hydrocarbon tails.
B. increasing the proportion of integral proteins.
C. increasing concentration of cholesterol in membrane.
D. increasing the number of phospholipids with saturated hydrocarbon tail.
Answer : A

6. Polysome is a chain of
A. oxysomes
B. sphaerosomes
C. ribosomes
D. dictyosomes
Answer : C

7. The following diagram shows some of the missing structures in a plant cell marked as A, B, C, D E. Choose the option with their correct names.

A. A - Plasmodesmata, B - Rough endoplasmic reticulum, C - Golgi apparatus, D - Mitochondrion, E - Ribosomes
B. A - Desmosome, B - Rough endoplasmic reticulum, C - Golgi apparatus, D - Mitochondrion, E - Ribosomes
C. A - Plasmodesmata, B - Smooth endoplasmic reticulum, C - Golgi apparatus, D - Mitochondrion, E - Ribosomes
D. A - Tight junction, B - Rough endoplasmic reticulum, C - Golgi apparatus, D - Mitochondrion, E -Ribosomes
Answer : A

8. Which one of the following structures between two adjacent cells is an effective transport pathway?
A. Plasmodesmata
B. Plastoquinones
C. Endoplasmic reticulum
D. Plasmalemma
Answer : A

9. Read the folowing statements and identify the correct option.

1. Contractile vacuole takes part in osmoregulation and excretion.
2. Food vacuole is formed by engulfing the food particles.
3. The vacuole is bound by a double membrane called tonoplast.
4. Vacuole can occupy upto 90 percent of the volume of the cell.

A. (i) and (ii)
B. (ii) and (iv)
C. (i), (ii) and (iv)
D. None of the above
Answer : C

10. Active transport across biomembrane involves
A. production of ATP
B. requirement of energy
C. production of toxin
D. release of energy
Answer : B

11. Satellite means
A. terminal part of the chromosome beyond secondary constriction.
B. terminal part of the chromosome beyond primary constriction.
C. terminal part of chromosome beyond tertiary constriction.
D. none of the above
Answer : A

12. The membrane of the erythrocytes has approximately ___% of proteins and ___% lipids.
A. 42, 50
B. 52, 40
C. 50, 50
D. 60, 40
Answer : B

13. Basal bodies are associated with the formation of
A. phragmoplast
B. cilia and flagella
C. cell plate
D. kinetochore
Answer : B

14. Match the items given in column-I with their role given in column-II and choose the correct option.

Column-I	Column-II
A. SER	I. Increase the surface area
B. Golgi apparatus	II. Store oils or fats
C. Cristae	III. Excretion
D. Peroxisome	IV. Photorespiration
E. Elaioplasts	V. Synthesis of lipid

A. A V; B III; C I; D IV; E II
B. A V; B III: C II; D IV; E I
C. A II; B III; C I; D IV; E V
D. A III; B IV; C I; D V; E II
Answer : A

15. Which of the following cell organelles were discovered after the introduction of electron microscope?
A. Mitochondria
B. Endoplasmic reticulum
C. Ribosomes
D. Both (b) and (c)
Answer : D

16. You are asked to examine a cell using a powerful light microscope. The image you see has a clearly defined nucleus and mitochondria. It also has a large central vacuole and chloroplasts. From what group of organisms did this cell most likely come?
A. Bacteria
B. Protists
C. Fungi
D. Plants
Answer : D

17. Which of the following is not the function of cell wall?

1. Provides shape to the cell.
2. Protects the cell from mechanical damage and infection.
3. Helps in cell to cell interaction.
4. Provides barrier to undesirable macromolecules.

A. Only (i)
B. Only (iv)
C. Only (ii), (iii) and (iv)
D. None of the above
Answer : D

18. The best way to identify a cell as either prokaryotic or eukaryotic is to determine whether
A. it came from a single-celled or multicellular organism.
B. it has a nucleu.
C. it has a plasma membrane.
D. it has cytosol.
Answer : A

19. In which of the following the cells are held together by a Ca-pectate layer?
A. Primary cell wall
B. Secondary cell wall
C. Middle lamella
D. Tertiary cell wall
Answer : C

20. 9.A student was given cell samples (A and B) to identify parts which are highlighted. He observed the samples under the microscope and list down the function of the part of cell sample. The information collected by the student is listed in the table below, on the basis of which the student infers that the samples contain the organelles.

Sample A	Sample B
Make energy available for cellular metabolism	Generates ATP and synthes izes s ugar
Absent in cell that carry oxygen throughout the body	Present in plant cell
Called the energy currency of cell	Source o f all the food energy

Explain why the samples were belonged to eukaryotic cell and not prokaryotic cell? Because,
A. eukaryotic cell have membrane bound organelles.
B. eukaryotic cell have non - membrane bound organelles.
C. eukaryotic cell are smaller and multiply more rapidly than prokaryotic cells.
D. eukaryotic cell are larger and multiply more rapidly than prokaryotic cells.
Answer : B

21. Which of the following pair are correctly matched.
A. Microtubules Structural components of cilia
B. Centrioles Store hydrolytic enzymes
C. Amyloplasts Store oil protein and starch in plants
A. A, B and C
B. A and B
C. A
D. A and C
Answer : C

22. Which of the following pair are correctly matched ?
(I) Amyloplasts Store proteins
(II) Mitochondrion Power house of the cell
(III) Stroma Chlorophyll pigment
(IV) Axoneme 9 + 2 array
A. (I) and (III) only
B. (II), (III) and (IV) only
C. (III) and (IV) only
D. (II) and (IV) only
Answer : D

23.
Which function is carried out by the cell organelle 'X'?
A. helps control the movement of substance in and out of the cell
B. passes information from the parent cell to newly formed cell
C. maintains the proper shape of the cell and serves as a protective barrier
D. helps the cell to make food with the help of chlorophyll and sunlight
Answer : A

24. Golgi apparatus is absent in
A. higher plants
B. yeast
C. bacteria and blue-green algae
D. None of the above
Answer : C

25. Microtubules, motor proteins, and actin filaments are all part of the
A. mechanism of photosynthesis that occurs in chloroplasts.
B. rough ER in prokaryotic cells.
C. cytoskeleton of eukaryotic cells.
D. process that moves small molecules across cell membranes.
Answer : C

26. Integral proteins of cell membrane occur on/in
A. inner surfaces
B. outer surfaces
C. phospholipid matrix
D. inner and outer surfaces
Answer : D

27. 8.A student was given cell samples (A and B) to identify parts which are highlighted. He observed the samples under the microscope and list down the function of the part of cell sample. The information collected by the student is listed in the table below, on the basis of which the student infers that the samples contain the organelles.

Sample A	Sample B
Make energy available for cellular metabolism	Generates ATP and synthes izes s ugar
Absent in cell that carry oxygen throughout the body	Present in plant cell
Called the energy currency of cell	Source o f all the food energy

Identify the part highlighted in the sample A and B and explain why they were called as semi-autonomous organelles?
A. Sample A - Mitochondria, Sample B - Chloroplast; because both the organelles are double membrane bound structure.
B. Sample A- Mitochondria, Sample B - Chloroplast; because they both are capable of synthesis of their own proteins only.
C. Sample A - Mitochondria, Sample B - Chloroplast; because they are capable of synthesis of their own proteins and contain their own DNA.
D. Sample A- Mitochondria, Sample B - Chloroplast; because they contain their own DNA to transfer the genetic information from one generation to another.
Answer : C

28. Match column-I and column-II and select the correct answer

Column-I	Column-II
A. Bacteria without walls	I. Lysosome
B. Small circular DNA	II. Mycoplasma cells
C. Flattened sacs in	III. Thylakoid a chloroplast
D. A vesicle in which	IV. Plasmid hydrolytic enzymes are stored

A. A III; B IV; C II; D I
B. A II; B IV; C III; D I
C. A I; B II; C III; D IV
D. A IV; B III; C I ; D II
Answer : B

29. Select the incorrect statement about prokaryotic ribosomes.
A. 50S and 30S subunits unite to form 70S ribosomes.
B. Polysome/polyribosome consists of many ribosomes only.
C. Ribosome is the site of protein synthesis.
D. Polysome indicate the synthesis of identical poolypeptide in multiple copies.
Answer : B

30. Study the following statements on cilium or flagellum and answer the question.

1. Cilium / Flagellum contains an outer ring of nine doublet microtubules surrounding two singlet microtubules.
2. Cilia are smaller which work like oars, causing the movement of either the cells or surrounding fluid.
3. Flagella are comparatively longer and responsible for cell movement.
4. Cilium and flagellum are covered with plasma membrane.

Which of the above statements are correct?
A. (i) and (ii)
B. (i), (ii), (iii) and (iv)
C. (i) and (iv)
D. (ii) and (iii)
Answer : B

strong>31. Centrioles and centrosomes occur in the cells of
A. green plants
B. animals
C. bacteria and cyanobacteria
D. both (b) and (c)
Answer : B

32. The given figures show two types of cell. Which structures are common to both the cells?

A. Nucleus and cell wall
B. Nucleus and cytoplasm
C. Ribosomes and flagella
D. Ribosomes and cell wall
Answer : D

33. Plastids are found in
A. all animal cells.
B. some animal cells.
C. all plant cells.
D. all plant cells and euglenoides.
Answer : D

34. Chromosomes having equal or almost equal arms are called
A. metacentric
B. acrocentric
C. polycentric
D. acentric.
Answer : A

35. A student placed two cells in the same solution in two different containers. The observation was given in the table.

Container	Observation
1	Cell burst
2	Cell does not change its shape

Which structure maintains the shape of the cell present in container 2 and provides the most significant difference between the two cells?
A. Nucleus
B. Cell wall
C. Chloroplast
D. Cell membrane
Answer : B

36. Which one of the following cellular parts is correctly matched with their characters ?
A. Centrioles Sites for active RNA synthesis.
B. Lysosomes Optimally active at a pH of about 8.5.
C. Thylakoids Flattened membranous sacs forming the grana of chloroplasts.
D. Ribosomes Those on chloroplasts are larger (80S) while those in the cytoplasm are smaller (70S).
Answer : C

37. Function of RER is
A. autolysis
B. protein synthesis
C. lipid synthesis
D. carbohydrate synthesis
Answer : B

38. Centrifugation of a cell results in the rupture of the cell membrane and the contents compacting into a pellets in the bottom of the centrifuge tube. Bathing this pellet with a glucose solution yields metabolic activity including the production of ATP. One of the contents of this pellet is most likely which of the following?
A. Cytosol
B. Mitochondria
C. Lysosomes
D. Golgi bodies
Answer : B

39. A component of cytoskeleton is
A. microtubule
B. bone
C. chitin
D. cartilage.
Answer : A

40. Choose the incorrect match.
A. Nucleus RNA
B. Lysosome Protein synthesis
C. Mitochondria Respiration
D. Cytoskeleton Microtubules
Answer : B

41. Which of the following statement of a bacterial cell is/are correct?

1. Mesosome is formed by the extensions of plasma membrane into the cell.
2. The pili are elongated tubular structures made up of a protein.
3. Flagellum is composed of filament, hook and basal body.
4. Ribosomes are about 30 nm by 50 nm in size.

A. (i), (ii), (iii)
B. All of the above
C. (ii) & (iv)
D. None of the above
Answer : A

42. Which of the following statements are correct?
A. Na+/K+ pump is an example of active transport.
B. In plant cells lipid like steroidal hormones are synthesized in SER.
C. In plant cells, the vacuoles can occupy up to 10% of the volume of the cell.
D. Chlorophyll and leucoplast are responsible for trapping light energy essential for photosynthesis.
Answer : A

43. Which of the following pair lack the unit membrane?
A. Nucleus and E.R.
B. Mitochondria and chloroplast
C. Ribosome and nucleolus
D. Golgi body and lysosome
Answer : C

44. Which of the following statement is correct regarding vacuole?
A. It is membrane-bound and contains storage proteins and lipids.
B. It is membrane-bound and contains water and excretory substances.
C. It lacks membrane and contains air.
D. It lacks membrane and contains water and excretory substances.
Answer : B

45. Choose the wrong statements regarding bacterial cell

1. Glycocalyx is the outermost envelope in bacteria.
2. The glycocalyx could be a loose sheath called capsule.
3. The glycocalyx may be thick and tough called slime layer.
4. A special structure formed by the plasma membrane is called mesosome.
5. Small bristle like fibres sprouting out of the cell are called fimbriae.

A. (i) and (iii)
B. (i) and (ii)
C. (ii) and (iii)
D. (i) and (iv)
Answer : C

46. In prokaryotes, chromatophores are
A. specialized granules responsible for colouration of cells
B. structures responsible for organizing the shape of the organism.
C. inclusion bodies lying free inside the cells for carrying out various metabolic activities.
D. internal membrane system which becomes extensive and complex in photosynthetic bacteria.
Answer : D

47. Match column-I (cell organelle) with column-II membrane and select the correct option from the codes given below.

Column-I	Column-II
A. Mitochondria	I. Without membrane
B. Lysosomes	II. Single membrane
C. Ribosomes	III. Double membrane

A. A - I, B - II, C - III
B. A - III, B - I, C - II
C. A - III, B - II, C - I
D. A - II, B - III, C - I
Answer : C

48. In which method of tansport, plasma membrane does not require carrier molecule?
A. Active transport
B. Facilitated diffusion
C. Simple diffusion
D. Na⁺ K⁺ pump
Answer : C

49. Given below are some characters of a cell organelle identify the correct organelle which shows all the characters described above.

1. It is a membrane bound space found in the cytoplasm.
2. It is bound by a single membrane called tonoplast.
3. It contains water, sap, excretory products and other materials not useful to the cell.
4. It has higher concentration of sap than the cytoplasm.

A. Golgi apparatus
B. Lysosomes
C. Endoplasmic reticulum
D. Vacuoles
Answer : D

50. The given diagram shows the types of chromosomes (labelled as A, B, C & D) based on the position of centromere.
Which one is the correct option for the labelled chromosomes. A, B, C and D ?

A. A Telocentric chromosome, B Acrocentric chromosome, C Submetacentric chromosome, D Metacentric chromosome
B. A Acrocentric chromosome, B Telocentric chromosome, C Metacentric chromosome, D Submetacentric chromosome
C. A Submetacentric chromosome, B Metacentric chromosome, C Telocentric chromosome, D Acrocentric chromosome
D. A Metacentric chromosome, B Submetacentric chromosome, C Acrocentric chromosome, D Telocentric chromosome.
Answer : A