GPB MCQ Quiz 166 for ICAR JRF/SRF/ARS Exam Preparation

Chromosome theory of heredity was stated by

A) Thomas Hunt Morgan (1901)

B) Thomas Hunt Morgan (1910)

C) Gallon (1900)

D) None of the above

Explanation: The chromosome theory of heredity was proposed by Thomas Hunt Morgan in 1910, linking chromosomes to the inheritance of genes.

"The gene is a factor for determining one or more hereditary characters in all organisms" was stated by

A) Galton (1900)

B) T.H. Morgan (1910)

C) Nurenberg (1901)

D) None of the above

Explanation: T.H. Morgan described the gene as a factor responsible for hereditary characters in 1910.

For the discovery of induction of mutation by x-ray in 1946 the Nobel prize was received by

A) T.H. Morgan

B) H.J. Muller

C) A. Kornberg and Ochoa

D) Holley

Explanation: H.J. Muller received the Nobel Prize in 1946 for demonstrating that X-rays can induce mutations in genes.

The discovery of double helix model of DNA was done by

A) Watson, Crick and Wilkins

B) H.J. Muller

C) A. Kornberg and Ochoa

D) Holley

Explanation: Watson, Crick, and Wilkins discovered the double helix structure of DNA in 1953.

Discovery of regulator genes and operator genes which regulate the activity of structural genes was done by

A) T.H. Morgan

B) Jacob, Monad and Leowulf

C) H.J. Muller

D) Holley

Explanation: Jacob, Monod, and Leowulf discovered regulator and operator genes that control structural gene activity.

For the outstanding work on genetic code Nobel prize was received in 1968 by

A) Hargovind Khurana

B) Nurenberg

C) Holley

D) All of the above

Explanation: Hargovind Khurana, Marshall Nirenberg, and Robert Holley jointly received the Nobel Prize in 1968 for their work on deciphering the genetic code.

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