GPB MCQ Quiz 163 for ICAR JRF/SRF/ARS Exam Preparation

Basic number is

A) The somatic chromosome number of a species

B) The genetic chromosome number of a true diploid species

C) Half of the somatic chromosome number of a species

D) None

Explanation: The basic chromosome number (x) is the number of distinct chromosomes in a single complete set, which is half the somatic number in diploids.

For the continuity of generation which cell division is essential?

A) Mitosis

B) Meiosis

C) None

D) All

Explanation: Meiosis is essential for producing gametes and ensuring continuity of generations.

Which cell division confirms growth of vegetative parts?

A) Mitosis

B) Meiosis

C) All

D) None

Explanation: Mitosis ensures cell division for growth, repair, and maintenance of vegetative tissues.

Of the following the plastid types are

A) Leucoplast

B) Chromoplast

C) Chloroplast

D) All

Explanation: Plastids are classified into leucoplasts, chromoplasts, and chloroplasts based on their function and pigment content.

Coupling and repulsion concepts of linkage has been discovered by Bateson and Punnett (1905) on

A) Drosophila

B) Wheat

C) Garden pea

D) Maize

Explanation: Bateson and Punnett studied coupling and repulsion of linked genes in garden peas to understand inheritance patterns.

Artificial copy of yeast gene was prepared by

A) Barbara McClintock

B) Mendel

C) Har Gobind Khurana

D) Jacob

Explanation: Har Gobind Khurana synthesized the first artificial gene, demonstrating the genetic code could be chemically created.

How the genetic components of the cell nucleus control the synthesis of protein was discovered by

A) Watson and Crick

B) Jacob

C) Har Gobind Khurana

D) None of above

Explanation: Watson and Crick elucidated the structure of DNA, revealing how genetic material in the nucleus directs protein synthesis.

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