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Molecular Basis of Inheritance

Multiple Choice Questions

111.

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

112.

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

113.

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

114.
Match the following column I with column II.

Column I Column II

A. Carcinogen 1. Cancerous Tumour

B. Anaphase -I 2. Disjunction

C. Mitosis 3. Synapse

D. Zygotene 4. Plectonemic Coiling

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

A-1, B-2, C-4, D-3

Carcinogen causes cancerous tumour disjunction of chromosomes takes place in anaphase I and II when chromosomes move to the opposite poles of the cell.

Plectonemic coiling refers to inter-twining of a double helix DNA molecule in such a way that for its correction unwinding of DNA helix molecule is required, this take place in mitosis in which sister chromatids are tightly coiled upon each other. In the zygotene stage, homologs login to synapse by coming to approximate alignment.