Cell - the unit of life MCQ Solved Paper for NDA

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

2. 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

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

4. Cell sap is a
A. living content of cytoplasm.
B. nonliving content of cytoplasm.
C. nonliving content of vacuole.
D. living content of vacuole.
Answer : C

5. 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

6. 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

7.
Which cellular structure helps in transferring genetic information from one generation to another?
A. W
B. X
C. Y
D. Z
Answer : C

8. Match column-I with column-II and select the correct option.

Column - I	Column - II
A. RER	I. Intracellular and extracellular digestion
B. Cell wall	II. Provide structural support to the cell
C. Flagella	III. Protein synthesis and secretion
D. Lysosomes	IV Responsible for cell movement

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

9. The diagram given below represent a filuid mosaic model of plasma membrance. Match the components marked as A, B, C, D and E in the diagram below from the list (i) to (vii).

1. Sugar
2. Protein
3. Lipid bilayer
4. Integral protein
5. Cytoplasm
6. Cell wall
7. External protein

A. A - (i), B - (ii), C - (iii), D - (iv), E - (v)
B. A - (ii), B - (i), C - (iii), D - (iv), E - (v)
C. A - (i), B - (ii), C - (iii), D - (iv), E - (vi)
D. A - (i), B - (ii), C - (iii), D - (vii), E - (v)
Answer : A

10. Identify the cell organelle given below. Which is an important site of formation of glyeoproteins & glycolipids

A. Rough endoplasmic reticulum
B. Smooth endoplasmic reticulum
C. Golgi body
D. mitochondria
Answer : C

11. Grana are
A. protein storing plastids.
B. coloured plastids.
C. stacks of thylakoids.
D. individual thylakoids present in stroma.
Answer : C

12. 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

13. 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 contins water and excretory substances.
C. It lacks membrane and contains air.
D. It lacks membrane and contains water and excretory substances.
Answer : B

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

15. 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

16. 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

17. Which of the following organelles is directly connected to the outer membrane of the nucleus in a eukaryotic cell?
A. Mitochondrion
B. Lysosome
C. Golgi apparatus
D. Endoplasmic reticulum
Answer : D

18. 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

19. 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

20. Axoneme with 9 + 2 microtubular arrangement occurs in
A. cilia
B. flagella
C. both (a) and (b)
D. centriole
Answer : C

21. Match column-I with column-II and choose the correct option.

Column-I	Column-II
A. Tonoplast	I. Contain digestive enzyme
B. Contractile vacuole	II. Store metabolic gases
C. Food vacuole	III. Excretion
D. Air vacuole	IV. Transport of ions in plants

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

22. The main organelle involved in modification and routing of newly synthesized proteins to their destinations is
A. chloroplast
B. mitochondria
C. lysosome
D. endoplasmic reticulum
Answer : D

23. 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

24. 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

25. 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 nucleus.
C. it has a plasma membrane.
D. it has cytosol.
Answer : A

26. An organalle devoid of membrane covering is
A. vacuole
B. ribosome
C. peroxisome
D. lysosome
Answer : B

27. Which of the following statements is/are correct ?

1. The shape of the cells may vary with the function they perform.
2. Human RBC is about 7.0 ??m in diameter.
3. Cytoplasm is the main area of cellular activities.
4. Various chemical reactions occur in cytoplasm to keep the cell in the living state.

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

28. The following diagram represents a structure chromosome.
Identify the structures marked as A, B and C.

A. A - Satellite, B - Primary constriction, C - Acrocentric
B. A - Satellite, B - Secondary constriction, C - Metacentric
C. A - Satellite, B - Centromere, C - Telocentric
D. A - Satellite, B - Centromere, C - Submetacentric
Answer : B

29. Prokaryotic and eukaryotic flagella differ in the
A. type of movement and placement.
B. location and mode of functioning.
C. microtubular structure and function.
D. microtubular organization and type of movement.
Answer : D

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

31. Function of contractile vacuole in Amoeba is
A. excretion and osmoregulation.
B. digestion and respiration.
C. osmoregulation and transportation.
D. none of the above.
Answer : A

32. 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

33. Extension of plasma membrane in prokaryotic cell is
A. mesosome
B. haploid
C. ribosome
D. none of these
Answer : A

34. Lysosomes contain
A. carbohydrates
B. hormones
C. nucleic acids
D. hydrolases.
Answer : D

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. Read the statements given below with regard to the functions performed by Golgi apparatus ?

1. Transport and chemically modify the materials contained within it.
2. Performs the function of packaging materials.
3. Important site of formation of glycoproteins and glycolipids.

Which of the following is the correct answer ?
A. (i) is wrong but (ii) and (iii) are correct
B. (ii) is wrong but (i) and (iii) are correct
C. (ii) and (iii) are wrong but (i) is correct
D. All are correct.
Answer : D

37. 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

38. Microtubules are absent in
A. mitochondria
B. centriole
C. flagella
D. spindle fibres
Answer : A

39. Statement 1: Centrosomes and centrioles are related to each other.
Statement 2: Centrosome usually contains two cylindrical structures called centrioles.
A. Both statements -1 and statement - 2 are true and statement - 2 is the correct explanation of statement - 1.
B. Both statements -1 and statement - 2 are true but statement - 2 is not the correct explanation of statement - 1.
C. Statement -1 is true and statement - 2 is false.
D. Statement -1 is false and statement - 2 is true.
Answer : A

40. _______________ is the important site of formation of glycoproteins and golycolipids.
A. SER
B. Lysosome
C. Golgi apparatus
D. Mitochondria
Answer : C

41. Match column-I with column-II and select the correct option.

Column - I	Column - II
A. Golgi apparatus	I. Storage
B. Mitochondria	II. Photosynthesis
C. Vacuoles	III. Transport
D. Grana	IV. Secretion
..	V. Respiration

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

42. 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

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 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

45. Match column-I (scientists) with column-II (discovery) and select the correct option.

Column-I	Column-II
A. Leeuwenhoek	I. First saw and described a living cell
B. Robert Brown	II. Presence of cell wall is unique to plant cells
C. Schleiden	III. Discovered the nucleus
D. Schwann	IV. 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

46.
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

47. Most of water, in mature plant cells occurs in
A. nucleus
B. cell wall
C. vacuoles
D. cytoplasm
Answer : C

49. Which of the following lacks cell wall?
A. Gametes
B. Amoeba
C. Mycoplasma
D. All of these
Answer : D

50. Membranous extensions in blue green algae are known as
A. phytochrome
B. chromatophore
C. mesosome
D. pneumatophore
Answer : B