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Cell: The Unit of Life · Question 126

AIPMT 2000MCQEasy📈 Topic in 50% papers+4−1
1

Spindle fibres unite with which structure of chromosomes?

  1. Chromocentre
  2. Chromomere
  3. Kinetochore
  4. Centriole

Answer

(3) Kinetochore

Solution

As per NCERT, the centromere of every chromosome carries disc-shaped structures on its sides called kinetochores.

⇒ During metaphase, spindle fibres attach to the kinetochores of the chromosomes.

∵ Centrioles organise the spindle but are not part of the chromosome; chromomeres and chromocentres are condensed chromatin regions.

∴ Spindle fibres unite with the kinetochore.

Answer: (3)

AIPMT 2000

Keep practising — Cell: The Unit of Life

2

Lysosome contains:

  1. Reductive enzymes
  2. Oxidative enzymes
  3. Anabolic enzymes
  4. Hydrolytic enzymes
AIPMT 2000
3

Which of the following ribosomes are engaged in protein synthesis in animal cell?

  1. Ribosomes of only nucleolus and cytosol
  2. Ribosomes which occur on nuclear membrane and E.R.
  3. Ribosomes of only mitochondria and cytosol
  4. Ribosomes of only cytosol
AIPMT 2000
4

Function of telomeres in nucleus is

  1. To seal the ends of chromosome
  2. Poleward movement
  3. To recognize the homologous chromosome
  4. To initiate the RNA synthesis
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5

Which cell organelle is concerned with glycosylation of protein?

  1. Endoplasmic reticulum
  2. Ribosome
  3. Mitochondria
  4. Peroxisome
AIPMT 2000

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