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

• Neurospora crassa

• Salmonella typhimurium

• Escherichia coli

• Diplococcus pneumoniae

The part of the bacterial chromosomes sharing homology with genome fragment transferred from the recipients to cell during emrozygote formation is known as

• Eugenic

• Exogenate

• Endogenate

• Dysgenic

The codon for anticodon 3-UUUA-5' is

• 3-AAU-5

• 5-UAAA-3

• 5-AAAU-3

• 3-UAAU-5'

Which of the following is true regarding the phase lambda, a virus which infects bacteria?

• In the lytic cycle, the bacterial host replicates viral DNA, passing it on to daughter cells during binary fission

• In the lysogenic cycle, the bacteria-host replicates viral DNA, passing it onto daughter cells during binary fission

• In the lytic cycle, viral DNA is integrated into the host genome

• In the lysogenic cycle, the host bacterial cell burst, releasing phases

A kind of biotechnology involving manipulation of
DNA is

• DNA replication

• Genetic engineering

• Denaturation

• Renaturation

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

In 1944, Avery, McCarty and MacLeod isolated substance from heat killed a virulent form of bacteria and added to the non-virulent form of bacteria which changed the non-virulent to virulent from this substance can be destroyed by

• DNAse

• Protease

• Lipase

• Amylase

A polygenic inheritance in human beings is

• Skin colour

• Sickle cell anaemia

• Colour blindness

• Phenylketonuria

Nucleic acid segment tagged with a radiactive molecule is called

• Clone

• Probe

• Plasmid

• Vector

Match the following column I with column II.

• A-1, B-2, C-4, D-3

• A-3, B-1, C-4, D-2

• A-2, B-3, C-1, D-4

• A-4, B-1, C-3, D-2