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SBI Clerk - Cell - the unit of life 1000+ MCQ [Solved] PDF Download

Thursday 9th of March 2023

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1. According to widely accepted fluid mosaic model cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect?
A. Proteins in cell membranes can travel within the lipid bilayer.
B. Proteins can also undergo flip-flop movements in the lipid bilayer.
C. Proteins can remain confined within certain domains of the membrane.
D. Many proteins remain completely embedded within the lipid bilayer.
Answer : B
2. 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
3. Which of the following will determines the shape of the cells and provides a strong structural support to prevent the bacterium from bursting or collapsing?
A. Plasmids
B. Cell wall
C. Mesosome
D. Cell membrane
Answer : B
4. 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
5.
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
6. Extension of plasma membrane in prokaryotic cell is
A. mesosome
B. haploid
C. ribosome
D. none of these
Answer : A
7. 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
8. Axoneme with 9 + 2 microtubular arrangement occurs in
A. cilia
B. flagella
C. both (a) and (b)
D. centriole
Answer : C
9. Active transport across biomembrane involves
A. production of ATP
B. requirement of energy
C. production of toxin
D. release of energy
Answer : B
10. 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
11. Select the statements which are related to Schwann.
  1. He reported that cells have a thin outer layer which is today known as plasma membrane
  2. Cell wall is a unique character of the plant cell.
  3. Body of plants and animals are composed of cells and products of cells.
A. Only (i)
B. Only (iii)
C. (i) and (iii)
D. All of these
Answer : D
12. 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
13. Match column-I (scientists) with column-II (discovery) and select the correct option.
Column-IColumn-II
A. LeeuwenhoekI. First saw and described a living cell
B. Robert BrownII. Presence of cell wall is unique to plant cells
C. SchleidenIII. Discovered the nucleus
D. SchwannIV. All plants are composed of different kind of cells
A. A I, B III, C IV, D II
B. A I, B III, C II, D IV
C. A III, B I, C IV, D II
D. A I, B IV, C II, D III
Answer : A
14. 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
15. Which one of the following is not considered as part of the endomembrane system?
A. Golgi complex
B. Peroxisome
C. Vacuole
D. Lysosome
Answer : B
16. Which of the following terms is not correctly matched with its feature?
A. Osmosis Movement of water by diffusion.
B. Nucleoplasm Site of active synthesis of ribosomal RNA.
C. Mesosome Infolding of cell membrane and characteristics of eukaryotes.
D. Pili Elongated tubular surface structures (made of special protein) of bacteria.
Answer : C
17. The cell theory was given in year 1839 by Schleiden and Schwann. According to this theory all organisms are composed of cell and cells are the basic unit of life.
How did this theory help in the field of science?
A. It helped to study the working of cells.
B. It helped in curing diseases caused by cell.
C. It helped in restating the earlier theories on cell.
D. It helped in introducing the use of microscopes to study cell.
Answer : A
18. Basal bodies are associated with the formation of
A. phragmoplast
B. cilia and flagella
C. cell plate
D. kinetochore
Answer : B
19. The lipid component of the membrane mainly consists of __________.
A. polysaccharides
B. phosphoglyceride
C. monosaccharaides
D. both (a) and (c)
Answer : B
20. Integral proteins of cell membrane occur on/in
A. inner surfaces
B. outer surfaces
C. phospholipid matrix
D. inner and outer surfaces
Answer : D
21. 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
22. _______________ is the important site of formation of glycoproteins and golycolipids.
A. SER
B. Lysosome
C. Golgi apparatus
D. Mitochondria
Answer : C
23. Who proposed the theory that Cells arise only from the pre-existing cells?
A. Mohl
B. Virchow
C. Haeckel
D. Brown
Answer : B
24. 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
25. Microtubules are absent in
A. mitochondria
B. centriole
C. flagella
D. spindle fibres
Answer : A
26. Which of the following lacks cell wall?
A. Gametes
B. Amoeba
C. Mycoplasma
D. All of these
Answer : D
27. 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
28. Most of water, in mature plant cells occurs in
A. nucleus
B. cell wall
C. vacuoles
D. cytoplasm
Answer : C
29. 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
30. 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
31. Select the correct match of the types of neuron present in column I with its location given in column II.
Column IColumn II
A. Centrioles(i) Non-membrane bound organelle which helps in cell division
B. Fimbriae(ii) Special structure of bacteria which help them to attach with rocks in stream and also to host tissue
C. Endomembrane(iii) Includes those organelles system whose functions are coordinated
D. Mitochondria(iv) Divide by fission and site of aerobic respiration
A. A - (i), B - (ii), C - (iii), D - (iv)
B. A - (iii), B - (i), C - (ii), D - (iv)
C. A - (iii), B - (i), C - (iv), D - (ii)
D. A - (i), B - (iv), C - (iii), D - (ii)
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. Grana are
A. protein storing plastids.
B. coloured plastids.
C. stacks of thylakoids.
D. individual thylakoids present in stroma.
Answer : C
34. 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
35. 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
36. Which one of the following organelle given below is correctly matched with its function ?
A. Golgi apparatus Protein synthesis
B. Golgi apparatus Formation of glycolipids
C. Rough endoplasmic reticulum Protein synthesis
D. Rough endoplasmic reticulum Formation of glycoproteins
Answer : C
37. 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
38. The figure below shows the structure of a mitochondrion with its four parts labelled (A), (B), (C) and (D).

Select the part correctly matched with its function.
A. Part (D): Outer membrane Gives rise to inner membrane by splitting.
B. Part (B): Inner membrane Forms infoldings called cristae.
C. Part (C): Cristae Possess single circular DNA molecule and ribosomes.
D. Part (A): Matrix Major site for respiratory chain enzymes.
Answer : B
39. Match column I (cell type) with column II (size) and choose the correct option.
Column-IColumn-II
(Cell type)(Size)
A. VirusesI. 1-2 ??m
B. PPLOII. 10-20 ??m
C. Eukaryotic cellIII. About 0.1 ??m
D. BacteriumIV. 0.02 - 0.2 ??m
A. A I, B II, C III, D IV
B. A IV, B III, C II, D I
C. A I, B III, C II, D IV
D. A IV, B II, C III, D I
Answer : B
40. Golgi apparatus is absent in
A. higher plants
B. yeast
C. bacteria and blue-green algae
D. None of the above
Answer : C
41. Membranous extensions in blue green algae are known as
A. phytochrome
B. chromatophore
C. mesosome
D. pneumatophore
Answer : B
42. pH of vacuolar cell sap is
A. neutral and isotonic.
B. alkaline and isotonic.
C. acidic and hypertonic.
D. equal to cytoplasm and isotonic.
Answer : C
43. 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
44. Plastids storing fat are called
A. Elaioplasts
B. Sphaerosomes
C. Aleuroplasts
D. Pyrenoids
Answer : A
45. Active transport differs from passive transport in that active transport
A. requires energy.
B. always requires input of ATP.
C. moves molecules against a concentration gradient.
D. both (a) and (c)
Answer : D
46. 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
47. 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 ASample B
Make energy available for cellular metabolismGenerates ATP and synthes izes s ugar
Absent in cell that carry oxygen throughout the bodyPresent in plant cell
Called the energy currency of cellSource 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
48. Which one of the following pairs is not correctly matched?
A. Cristae The tubular structure formed by the folding of the inner membrane of the mitochondrion.
B. Plasmodesmata The membrane surrounding the vacuole in plants.
C. Grana Membrane bound discs in chloroplasts that contain chlorophylls and carotenoids.
D. Middle lamella Layer between adjacent cells walls in plants derived from cell plate.
Answer : B
49. Which of the following is incorrect ?
A. Mycoplasma is the smallest cell (0.3 �).
B. Bacteria are 3 to 5 �m in size. C. The largest cell is the egg of an ostrich.
D. Nerve cells are some of the smallest cells.
Answer : D
50. Plastids are found in
A. all animal cells.
B. some animal cells.
C. all plant cells.
D. all plant cells and euglenoides.
Answer : D
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