
Match the Column I with Column II and select the correct option from the following.
Column I
Column II
a.
Griffith
i.
One gene-one enzyme
b.
Avery, McLeod and McCarty
ii.
Nuclein
c.
Miescher
iii.
In phage, DNA is the only genetic material
d.
Hershey and Chase
iv.
DNA is the genetic material
e.
Beadle and Tatum
v.
Transformation
Beadle and Tatum


Important Questions on Gene: Its Nature, Expression and Regulation


Identify the correct match between the codons and coding functions.
Column I | Column II | ||
a. | i. | Phenylalanine | |
b. | ii. | Methionine | |
c. | iii. | Tryptophan | |
d. | iv. | Termination |



In Hershey-Chase's experiment, when the radioactive viruses were allowed to infect E.coli, what was observed?
(i) E.coli, which were infected by viruses with radioactive DNA, became radioactive.
(ii) E.coli, which were infected by viruses with radioactive protein, did not become radioactive.
(iii) E.coli, which were infected by viruses with radioactive DNA, did not become radioactive.
(iv) E.coli, which were infected by viruses with radioactive protein, became radioactive.


What statement about RNA is true?
(i) It is a simple, straight or coiled, single-stranded molecule.
(ii) Components of RNA are ribose sugar, phosphate and N-bases.
(iii) The N-bases of RNA are adenine, guanine, thymine and cytosine.
(iv) Strand of RNA is a long chain of nucleotides joined by phosphodiester bonds.
(v) Base pairing between complementary bases occur on coiling or folding of an RNA molecule.
