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Cell: The Unit of Life · Question 43

NEET 2018MCQEasy📈 Topic in 50% papers+4−1
1

Which of the following is true for nucleolus?

  1. It takes part in spindle formation
  2. Larger nucleoli are present in dividing cells
  3. It is a membrane-bound structure
  4. It is a site for active ribosomal RNA synthesis

Answer

(4) It is a site for active ribosomal RNA synthesis

Solution

As per NCERT, the nucleoplasm contains the nucleolus, a spherical structure not bound by any membrane, whose content is continuous with the rest of the nucleoplasm.

It is a site for active ribosomal RNA synthesis ⇒ (4) is true.

Larger and more numerous nucleoli are present in cells actively carrying out protein synthesis (nucleoli disappear during cell division), and spindle is formed by centrioles/microtubules ⇒ (1), (2) and (3) are false.

Answer: (4)

NEET 2018

Keep practising — Cell: The Unit of Life

2

The Golgi complex participates in

  1. activation of amino acid
  2. fatty acid breakdown
  3. formation of secretory vesicles
  4. respiration in bacteria
NEET 2018
3

Which of the following events does not occur in rough endoplasmic reticulum?

  1. Cleavage of signal peptide
  2. Phospholipid synthesis
  3. Protein folding
  4. Protein glycosylation
NEET 2018
4

Select the incorrect match.

  1. Allosomes – Sex chromosomes
  2. Sub-metacentric chromosomes – L-shaped chromosomes
  3. Lampbrush chromosomes – Diplotene bivalents
  4. Polytene chromosomes – Oocytes of amphibians
NEET 2018
5

Which of the following components provides sticky character to the bacterial cell?

  1. Nuclear membrane
  2. Plasma membrane
  3. Glycocalyx
  4. Cell wall
NEET 2017
6

DNA replication in bacteria occurs

  1. within nucleolus
  2. prior to fission
  3. just before transcription
  4. during S phase
NEET 2017
7

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

  1. Ribosome
  2. Mitochondrion
  3. Chloroplast
  4. Lysosome
NEET 2017
8

Water soluble pigments found in plant cell vacuoles are

  1. carotenoids
  2. anthocyanins
  3. xanthophylls
  4. chlorophylls.
NEET 2016 (Phase 1)
9

Mitochondria and chloroplast are- Which one of the following options is correct?

  1. Both A and B are false
  2. Both A and B are correct
  3. B is true but A is false
  4. A is true but B is false
NEET 2016 (Phase 1)
10

Microtubules are the constituents of

  1. Cilia, Flagella and Peroxisomes
  2. Centrosome, Nucleosome and Centrioles
  3. Spindle fibres, Centrioles and Cilia
  4. Centrioles, spindle fibres and chromatin
NEET 2016 (Phase 1)
11

Which one of the following cell organelles is enclosed by a single membrane?

  1. Mitochondria
  2. Chloroplasts
  3. Lysosomes
  4. Nuclei
NEET 2016 (Phase 1)

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