281.

The Okazaki fragments in DNA chain growth

• Results in transcription

• Polymerise in the 3' to 5' direction and forms replication fork

• Prove semi-conservative nature of DNA replication

• Polymerise in the 5' to 3' direction and explain 3' to 5 DNA replication

One gene-one enzyme relationship was established for the first time in

• Neurospora crassa

• Salmonella typhimurium

• Escherichia coli

• Diplococcus pneumoniae

Balbiani rings are the structural features of

• allosomes

• polytene chromosomes

• autosomes

• lampbrush chromosomes

Jumping genes in maize were discovered by

• Hugo de Vries

• Barbara McClintock

• T H Morgan

• Mendel

DNA element with ability to change position is called

• cistron

• transposon

• intron

• recon

Initiation codon is

• UUU

• UGA

• AUG

• UAG

DNA mutiplication is called

• translation

• replication

• transduction

• transcription

A eukaryotic gene contains two kinds of base sequences. Which of these plays an important role in protein synthesis?

• Introns

• Exons

• Both (a) and (b)

• None of these

Repressor protein is produced by

• regulator gene

• operator gene

• structural gene

• promoter gene

The back bone of RNA consists of which of the following sugar?

• Deoxyribose

• Ribose

• Sucrose

• Maltose