Cell and Molecular Biology

JKPSC Assistant Professor (Botany) · Botany · 72 practice questions with answers and explanations: 7 Easy, 65 Medium, 0 Hard.

Sample questions

Sample Easy question 1

The smallest unit of heredity is the:

  1. Tissue
  2. Cell
  3. Organ
  4. Gene
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Answer: D. Genes are sections of DNA.

Sample Easy question 2

The plant cell division differs from the animal cell division in having:

  1. Centrioles
  2. Asters
  3. A cleavage furrow
  4. Cell plate formation
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Answer: D. A phragmoplast builds the new wall.

Sample Easy question 3

Microtubules are composed of:

  1. Actin
  2. Tubulin
  3. Myosin
  4. Keratin
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Answer: B. α- and β-tubulin dimers.

Sample Medium question 4

The primary cell wall of plants is mainly:

  1. Lignin
  2. Chitin
  3. Cellulose, hemicellulose and pectin
  4. Suberin
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Answer: C. It is flexible.

Sample Medium question 5

The secondary cell wall is characterised by:

  1. Pectin only
  2. Lignin deposition
  3. Chitin
  4. Gums
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Answer: B. It is rigid.

Sample Medium question 6

The middle lamella is made of:

  1. Calcium and magnesium pectates
  2. Cellulose
  3. Cutin
  4. Lignin
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Answer: A. It cements adjacent cells.

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