Question

In eukaryotes, after transcription of mRNA, some of its nucleotides are removed before it is translated into polypeptide. The nucleotides which are removed from mRNA are called

A. exons

B. upstream sequences

C. unusual bases

D. introns

Answer : introns

Releted MCQ Question on
Botany >> Molecular Basis of Inheritance

Releted Question 1

If the distance between two consecutive base pairs is $$0.34\,nm$$ and the total number of base pairs of a DNA double helix in a typical mammalian cell is $$6.6 \times {10^9}\,bp,$$ then the length of the DNA is approximately

A. 2.5 meters

B. 2.2 meters

C. 2.7 meters

D. 2.0 meters

Releted Question 2

Which of the following statements is correct?

A. Adenine pairs with thymine through one $$H$$-bond

B. Adenine pairs with thymine through three $$H$$-bonds

C. Adenine does not pair with thymine

D. Adenine pairs with thymine through two $$H$$-bonds

Releted Question 3

Which scientist experimentally proved that DNA is the sole genetic material in bacteriophage?

A. Jacob and Monod

B. Beadle and Tautum

C. Messelson and Stahl

D. Hershey and Chase

Releted Question 4

The final proof for DNA as the genetic material came from the experiments of:

A. Hershey and Chase

B. Avery, Mcleod and McCarty

C. Hargobind Khorana

D. Griffith

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Molecular Basis of Inheritance

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Zoology Animal Kingdom Structural Organisation in Animals Biomolecules Digestion and Absorption Breathing and Exchange of Gases Body Fluids and Circulation Excretory Products and Their Elimination Locomotion and Movement Neural Control and Coordination Chemical Coordination and Integration Human Reproduction Reproductive Health Evolution Human Health and Diseases Biotechnology: Principles and Processes Biotechnology and its Applications Zoology Miscellaneous