Molecular Basis of Inheritance 4

DNA replication takes place at _________ phase of the cell

cyle.

• G1

• S

• G2

• M

The process of copying genetic information from one strand of DNA to RNA is termed as _________ .

• replication

• transcription

• translation

• reverse transcription

The enzyme DNA dependent RNA polymerase catalyses the polymerisation reaction in ___________direction.

• only 5’ → 3’

• only 3’ → 5’

• both (a) and (b)

• none of these

If the sequence of bases in coding strand of DNA is ATTCGATG, then the sequence of bases in mRNA will be

• TAAGCTAC

• UAAGCUAC

• ATTCGATG

• AUUCGAUG.

If the sequence of bases in DNA is GCTTAGGCAA then the sequence of bases in its transcript will be

• GCTTAGGCAA

• CGAATCCGTT

• CGAAUCCGUU

• AACGGAUUCG.

Transcription unit

• starts with TATA box

• starts with pallendrous regions and ends with rho factor.

• starts with promoter region and ends in terminator region

• starts with CAAT region.

During transcription, the site of DNA molecule at which RNA polymerase binds is called

• promoter

• regulator

• receptor

• enhancer.

Polycistronic messenger RNA (mRNA) usually occurs in

• bacteria

• prokaryotes

• eukaryotes

• both (a) and (b)

In transcription in eukaryotes, heterogenous nuclear RNA (hnRNA) is tmascribed by

• RNA polymerase I

• RNA polymerase II

• RNA polymerase III

• all of these.

Methyl guanosine triphosphate is added to the 5’ end of hnRNA in a process of

• splicing

• capping

• tailing

• none of these