Cell: The Unit of Life

NEET Biology · 161 questions · Page 12 of 17 · Click an option or "Show Solution" to reveal answer

Q111

Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?

A Ribosome

B Mitochondrion

C Chloroplast

D Lysosome

Correct Answer

Option B

Solution

The site of aerobic oxidation of carbohydrates in cells to generate ATP are mitochondria.

Q112

Select the wrong statement-

A Pili and fimbriae are mainly involved in motility of bacterial cells

B Mycoplasma is a wall-less microorganism

C Bacterial cell wall is made up of peptidoglycan

D Cyanobacteria lack flagellated cells.

Correct Answer

Option A

Solution

Pili and fimbriae are bacterial appendages which are not involved in locomotion.

Q113

Select the mismatch.

A Large central vacuoles – Animal cells

B Methanogens –Prokaryotes

C Gas vacuoles – Green bacteria

D Protists – Eukaryotes

Correct Answer

Option A

Solution

Large central vacuole is the characteristic of plant cell, not animal cell which may have many small scattered vacuoles.

Q114

Mitochondria and chloroplast are- (a) semi-autonomous organelles (b) formed by division of pre existing organelles and they contain DNA but lack protein synthesising machinery Which one of the following options is correct?

A Both (a) and (b) are false

B Both (a) and (b) are correct

C (b) is true but (a) is false

D (a) is true but (b) is false

Correct Answer

Option D

Solution

Mitochondria & chloroplast are semiautonomous cell organelle which are formed by division of pre-existing organelle & contain DNA but they also contain protein synthesizing machinery, thus (a) is true & (b) is false.

Q115

Microtubules are the constituents of

A Cilia, Flagella and Peroxisomes

B Centrosome, Nucleosome and Centrioles

C Spindle fibres, Centrioles and Cilia

D Centrioles, spindle fibres and chromatin

Correct Answer

Option C

Solution

Microtubules are long, hollow cylinders made up of polymerised alpha- and beta-tubulin dimers.

They are part of a structural network (the cytoskeleton) within the cell cytoplasm.

Q116

Cellular organelles with membranes are -

A endoplasmic reticulum, ribosomes and nuclei

B lysosomes, Golgi apparatus and mitochondria

C nuclei, ribosomes and mitochondria

D chromosomes, ribosomes and endoplasmic reticulum

Correct Answer

Option B

Solution

Lysosomes, golgi apparatus and mitochondria are the cell organelles which have membranes.

Q117

Which of the following structures is not found in a prokaryotic cell?

A Mesosome

B Nuclear envelope

C Ribosome

D Plasma membrane

Correct Answer

Option B

Solution

A prokaryotic cell is characterised by absence of an organised nucleus and membrane bound cell organelles.

DNA is naked i.e., without a nuclear envelope and lies variously coiled in the cytoplasm.

Q118

Which of the following are not membranebound ?

A Ribosomes

B Mesosomes

C Lysosomes

D Vacuoles

Correct Answer

Option A

Solution

Endoplasmic reticulum, nuclei, lysosomes, Golgi apparatus and mitochondria are membrane bound cell organelles whereas ribosomes are naked ribonucleoprotein protoplasmic particles.

Q119

The chromosomes in which centromere is situated close to one end are :

A Telocentric

B Metacentric

C Sub-metacentric

D Acrocentric

Correct Answer

Option D

Solution

In acrocentric chromosomes, centromere appears subterminal, ie, with a very small and a very long arm.

Q120

DNA is not present in :

A Nucleus

B Chloroplast

C Mitochondria

D Ribosomes

Correct Answer

Option D

Solution

Ribosomes are composed of ribonucleic acid and proteins and are not surrounded by any membrane.

These are the site for protein synthesis.

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