Introduction to Biotechnology MCQs

Question 1

DNA sequencing method was proposed by

Accepted Answer

Sanger

Answer

Watson

Answer

Crick

Answer

None of these

Question 2

The Hersey and Chase experiment which offered evidence in support of DNA being the genetic material in bacteriophage made use of the following labeled compounds?

Accepted Answer

Phosphorous and sulfur

Answer

Nitrogen and oxygen

Answer

Tritium

Answer

Hydrogen

Question 3

Pyrethrum is obtained from

Accepted Answer

Chrysanthemum cinerarifolium

Answer

Nicotiana sp

Answer

Derris elliptica

Answer

Lonchocarpus nicou

Question 4

Bacillus thuringiensis (Bt) strains have been used for designing novel

Accepted Answer

Bioinsecticidal plants

Answer

Biofertilizers

Answer

Bio-metallurgical techniques

Answer

Bio-mineralization processes

Question 5

Rockefeller group discovered that the extract of dead capsule forming Pneumococci could transform a non-capsulated strain. What transforming material was present in the extract of the dead strain?

Accepted Answer

DNA

Answer

Denatured proteins

Answer

t-RNA

Answer

Toxins

Question 6

The principle of transformation was given by

Accepted Answer

Griffith

Answer

Hersey and Chase

Answer

Avery

Answer

McCarty

Question 7

What is true about Bt toxin?

Accepted Answer

The inactive protoxin gets converted into active form in the insect gut

Answer

Bt protein exists as active toxin in the Bacillus

Answer

The activated toxin enters the ovaries of the pest to sterilise it and thus prevent its multiplication

Answer

The concerend Bacillus has antitoxins

Question 8

Glyoxylate pathway was discovered by

Accepted Answer

Kornberg and Krebs

Answer

Krebs

Answer

Beevers

Answer

Slater

Question 9

Who for the first time resolved that the nuclei are composed of exclusively nucleic acid?

Accepted Answer

F. Miescher

Answer

Hargovind Khorana

Answer

J. D. Watson and F. Crick

Answer

A. Kornberg