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Cell: The Unit of Life · Question 46

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

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

Answer

(4) Polytene chromosomes – Oocytes of amphibians

Solution

(1) Allosomes are the sex chromosomes (e.g., X and Y) ⇒ correct.

(2) As per NCERT, a sub-metacentric chromosome has its centromere slightly away from the middle, giving one shorter and one longer arm ⇒ L-shape at anaphase ⇒ correct.

(3) Lampbrush chromosomes are diplotene bivalents seen in the oocytes of amphibians (and other vertebrates) ⇒ correct.

(4) Polytene chromosomes occur in the salivary glands of insect larvae (e.g., Drosophila), not in amphibian oocytes ⇒ incorrect.

Answer: (4)

NEET 2018

Keep practising — Cell: The Unit of Life

2

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
3

DNA replication in bacteria occurs

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

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
5

Water soluble pigments found in plant cell vacuoles are

  1. carotenoids
  2. anthocyanins
  3. xanthophylls
  4. chlorophylls.
NEET 2016 (Phase 1)
6

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)
7

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)
8

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)
9

Select the mismatch.

  1. Large central vacuoles – Animal cells
  2. Methanogens – Prokaryotes
  3. Gas vacuoles – Green bacteria
  4. Protists – Eukaryotes
NEET 2016 (Phase 2)
10

Select the wrong statement-

  1. Pili and fimbriae are mainly involved in motility of bacterial cells
  2. Mycoplasma is a wall-less microorganism
  3. Bacterial cell wall is made up of peptidoglycan
  4. Cyanobacteria lack flagellated cells.
NEET 2016 (Phase 2)
11

A cell organelle containing hydrolytic enzymes is

  1. Ribosome
  2. Mesosome
  3. Lysosome
  4. Microsome
NEET 2016 (Phase 2)

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