Cell The Unit Of Life — DPP 5

20 NEET questions from Cell The Unit Of Life, with answers and explanations. Attempt it as a timed test to get scoring, accuracy breakdown and mistake tracking.

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1
Select the correct statement from the following regarding cell membrane: -
  1. A Lipids are arranged in a bilayer with polar heads towards the inner part
  2. B Fluid mosaic model of cell membrane was proposed by Singer and Nicolson
  3. C $\mathrm { Na } ^ { + }$and $\mathrm { K } ^ { + }$ions move across cell membrane by passive transport
  4. D Proteins make up 60 to $70 \%$ of the cell membrane
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Correct answer: B

2
New cells generate from-
  1. A bacterial fermentation
  2. B regeneration of old cells
  3. C pre-existing cells
  4. D abiotic materials
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Correct answer: C

3
Interphase nucleus has loose and indistinct network of nucleoprotein fibres called chromatin, but during different stages of cell division, cells show 'structured chromosomes' in place of the :-
  1. A Nucleus
  2. B Cytoplasm
  3. C Mitochondria
  4. D Nucleolus
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Correct answer: A

4
The organelle in cell which is surrounded by amorphous pericentriolar material has :-
  1. A Two centriole which lie perpendicular to each other.
  2. B Same arrangement of tubules as in cilia or flagella.
  3. C Peripheral fibril which is double as compare to cilia.
  4. D Important role during generative and vegetative cell formation by division in microspore.
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Correct answer: A

5
Given below are two statement -
Statement-I :- In plants, the tonoplast facilitates the transport of a number of ions and other materials against concentration gradient into the vacuole.
Statement-II :- Golgi apparatus is the important site of formation of glycoprotein and glycolipids.
In the light of the above statements, choose the correct answer from the options given below -
  1. A Both statement I and statement II are correct
  2. B Both statement I and statement II are incorrect
  3. C Statement I is correct but statement II is incorrect
  4. D Statement I is incorrect but statement II is correct
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Correct answer: A

6
Which of the following is not function of endoplasmic reticulum?
  1. A Formation of acrosome
  2. B Detoxification
  3. C Mechanical support
  4. D Formation of nuclear membrane
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Correct answer: A

7
The fluid mosaic model of plasma membrane given by Singer and Nicolson is applicable for:
  1. A Only for prokaryotic membrane
  2. B Only for eukaryotic membrane
  3. C Both for prokaryotic and eukaryotic membranes
  4. D Only for organellar membranes
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Correct answer: C

8
The plasma membrane consists mainly of:
  1. A proteins embedded in a carbohydrate bilayer
  2. B phospholipids embedded in a protein bilayer
  3. C proteins embedded in a phospholipid bilayer
  4. D proteins embedded in a polymer of glucose molecules
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Correct answer: C

9
Single, circular DNA molecule is found in :-
Cell The Unit Of Life – NEET-2623
  1. A B
  2. B D
  3. C E
  4. D C
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Correct answer: B

10
The ribosomes which are found in prokaryotes are :-
  1. A The site of protein synthesis
  2. B 50 S and 30 S subunits
  3. C 70 S and form polysome
  4. D All of these
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Correct answer: D

11
Assertion (A) : Chloroplast & Mitochondria are considered as "Semi-autonomous organelle" of the cell.
Reason (R) : Both the organelle possess their own genetic material and have their own protein synthesising machinery.
  1. A Both Assertion and Reason are True and the Reason is a correct explanation of the Assertion.
  2. B Both Assertion and Reason are True but Reason is not a correct explanation of the Assertion.
  3. C Assertion is True but the Reason is False.
  4. D Both Assertion and Reason are False.
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Correct answer: A

12
Transport of molecules across the membrane against their concentration gradient is :-
  1. A An energy independent process
  2. B Osmosis
  3. C Diffusion
  4. D An energy dependent process
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Correct answer: D

13
The term Chromatin was given by :-
  1. A W. Flemming
  2. B Robert Brown
  3. C George Palade
  4. D Camillo Golgi
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Correct answer: A

14
Which statement is wrong among them :-
  1. A Lysosomes are formed by the process of packaging in the Golgi apparatus and are rich in hydrolytic enzyme.
  2. B Vacuole contain water sap, excretory product and other useful material of cell.
  3. C In amoeba contractile vacuole help in excretion.
  4. D Mitochondria unless specifically stained are not easily visible under microscope.
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Correct answer: B

15
Ground substance present inside the mitochondria is called :-
  1. A Stroma
  2. B Matrix
  3. C Cell sap
  4. D Cytoplasm
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Correct answer: B

16
Given below are two statements:
Statement-I : Periplasmic space in bacteria contain enzyme similar to lysosome.
Statement-II : Heterophagosomes are formed by fusion of primary lysosome and phagosome.
In the light of the above statements, choose the most appropriate answer from the options given below :-
  1. A Both Statement-I and II are correct.
  2. B Statement-I is correct but statement-II is incorrect.
  3. C Statement-I is incorrect and Statement-II is correct.
  4. D Both Statement-I and II are incorrect.
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Correct answer: A

17
Histone proteins are rich in which of the following amino acids?
  1. A Arginine and Histidine
  2. B Arginine and Lysine
  3. C Histidine and Lysine
  4. D Tryptophan and Lysine
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Correct answer: B

18
Ribosomal RNA is actively synthesized in:-
  1. A Nucleoplasm
  2. B Ribosomes
  3. C Lysosomes
  4. D Nucleolus
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Correct answer: D

19
During germination of seeds which cell organelle converts fatty acid into soluble carbohydrate?
  1. A Peroxisome
  2. B Glyoxysome
  3. C Golgi body
  4. D Lysosome
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Correct answer: B

20
What is the correct arrangement of Lipid molecules in the cell membrane
  1. A Polar tail - inner side, Non-polar head - outer side
  2. B Non-polar head - Outside, Polar tail - Inner side
  3. C Polar tail-Outside, Non-polar head - Inner side
  4. D Polar head - Outside, Non-polar tails - Inner side
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Correct answer: D

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