Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Molecular Basis of Inheritance

Multiple Choice Questions

121.

Balbiani rings are the structural features of

allosomes
polytene chromosomes
autosomes
lampbrush chromosomes

122.

Jumping genes in maize were discovered by

Hugo de Vries
Barbara McClintock
T H Morgan
Mendel

123.

DNA element with ability to change position is called

cistron
transposon
intron
recon

124.
Initiation codon is

UUU

UGA

AUG

UAG

AUG

AUG codes for Methionine (Met) that is used as a start signal in protein syntheis. Hence, it is an initiation codon.

Also, in prokaryotes, codons GUG and UUG are the start codons.

UAA (ochre), UAG (amber) and UGA (opal) are the non- sense codons as they do not code for any amino acid. Their main function is to terminate the message for gene controlling protein synthesis. Therefore, termed as chain termination or stop codons.

UUU (uracil) codes for phenylalanine.