Protein and Nuclei Acids MCQs

Question 1

The 5' upstream of a transcription start contains

Accepted Answer

Promoter

Answer

Poly A tail

Answer

Intron

Answer

Exon

Question 2

Open promoter complex comprises

Accepted Answer

Both A and B

Answer

RNA polymerase bound on cis acting element promoter

Answer

local unwinding of DNA at active genic region

Answer

Proteins started to open up chromatin

Question 3

The first level of regulation of gene expression in eukaryotes is

Accepted Answer

DNA methylation and chromatin structure

Answer

Transcription

Answer

RNA processing

Answer

Post transcriptional modification

Question 4

Enzyme which digest nucleic acid by hydrolyzing phosphodiester bonds are called as

Accepted Answer

All of the above

Answer

Nucleases

Answer

Deoxyribonucleases (if substrate is DNA)

Answer

Ribonucleases (if substrate is RNA)

Question 5

The size of the maximum DNA insert that can be cloned in a YAC

Accepted Answer

200 - 2000 kb

Answer

< 300 kb

Answer

100 - 300 kb

Answer

70 - 100 kb

Question 6

In a double stranded molecule of DNA, the ratio of purines : pyrimidines is

Accepted Answer

Always 1 : 1

Answer

Variable

Answer

Determined by the base sequence in RNA

Answer

Genetically determined

Question 7

The smallest plant genome identified

Accepted Answer

Arabidopsis

Answer

Chlorella

Answer

Oryza sativa

Answer

Ground nut

Question 8

Which one of the following amino acid has crucial role in the variability of protein structure?

Accepted Answer

Glycine

Answer

Cysteine

Answer

Aspartic acid

Answer

Glutamic acid

Question 9

Transcription is the process of

Accepted Answer

Using DNA strand as a template to synthesize a complementary RNA molecule

Answer

Synthesizing a DNA molecule from RNA template

Answer

Using DNA strand as template to synthesize identical RNA molecule

Answer

Synthesizing a protein using information carried in the nucleotide sequence of a messenger RNA