Mutation is sudden chemical change in a…… molecule.
a) DNA
b) RNA
c) both a & b
d) none of these
DNA stands for…………
a)Deoxiribonucleic acid
b) ribo nucleic acid
c) double nucleic acid
d) double nitric acid
Majority of
changes in DNA are repaired by special…………in the cell.
a) vitamin
b) both a &
b
c) enzymes
d) none of these
Failure in repair by the enzyme system can cause a…………
a) polio
b) mutation
c) hepatitis
d) TB
Changes in DNA molecules may be caused by mutagens like…………
a) chemical agents
b) radiation
c) viruses
d) all of these
RNA is responsible for directing the synthesis of new
b) proteins
a) fats
b) nucleic acid
c) carbohydrates
