Sardar Krushinagar Dantiwada Agricultural Uiversity 2010 Bachelor of Veterinary Science & Animal-Husbandary for competitive -exam question paper

MULTIPLE CHOICE QUESTION

VETERINARY SCIENCE & ANIMAL HUSBANDRY

(For Competitive Examination of Veterinary Science)

EDS-76 is

a.       Herpes virus

b.      Corona virus

c.       Adenovirus

d.      Poxvirus

Paired serum samples means

a.       Serum sample collected at two different stages of a disease from an animal

b.      From two different animals.

c.       Samples divided in two aliquots.

d.      Samples collected from two parents.

Which of the following showing buoyant density of DNA, RNA and Protein is correct:

a.       RNA>DNA>Protein

b.      Protein>RNA>DNA

c.       DNA> RNA>Protein

d.      Protein>DNA>RNA

Intercalation of ethidium bromide (etBr) in DNA molecule will:

a.       Increase the buoyant density of DNA molecule

b.      Decreases the buoyant density of DNA molecule

c.       Does not affect the buoyant density of DNA molecule

d.      None of the above

Exonucleases:

a.       Removes nucleotides one at a time from the end of DNA molecule

b.      Break internal phospho-diester bonds within DNA molecule

c.       Removes nucleotides only in 3-5 direction

d.      Removes nucleotides only in 5-3 direction

Endonucleases:

a.       Removes nt one at a time from the end of DNA molecule

b.      Break internal phospho-diester bonds within DNA molecule

c.       Removes nts only in 3-5 direction

d.      Removes nts only in 5-3 direction

The enzyme used to remove phosphate group at the 5 end of DNA molecule is:

a.       Alkaline phosphatase

b.      Polynucleotide kinase

c.       Terminal deoxytransferase

d.      Topoisomerase

The enzyme used to add phosphate group at the free 5 end of DNA molecule is:

a.       Alkaline phosphatase

b.      Polynucleotide kinase

c.       Terminal deoxytransferase

d.      Topoisomerase

The enzyme that changes the conformation of covalently closed circular DNA by introducing of removing supercoils is:

a.       Alkaline phosphatase

b.      Polynucleotide kinase

c.       Terminal deoxytransferase

d.      Topoisomerase

Eco RI produces:

a.       Blunt end

b.      Sticky end

c.       Both

d.      None

The specific position on a DNA molecule where DNA replication begins is called:

a.       Replication fork

b.      Origin of replication

c.       Start Point of replication

d.      None of the above

An algorithm used to search homology is:

a.       BLAST

b.      CLAST

c.       PUBSCAN

d.      HOMOSCAN

The fact that not all codons are used equal frequency in the genes of a particular organism is called:

a.       Codon preference

b.      Codon bias

c.       Codon choice

d.      None of the above

A technique that can be used to construct a clone contig by identifying overlapping fragments of cloned DNA:

a.       Gene walking

b.      Chromosome walking

c.       Clone fingerprinting

d.      None of the above

The ability of two different types of plasmid to co-exist in same cell is called:

a.       Competence

b.      Compatibility

c.       Interference

d.      None of the above

The non coding sequence within genes that do not translate into protein is:

a.       Intron

b.      Exon

c.       Transposons

d.      None of the above

The coding sequence within genes that translate into protein is:

a.       Intron

b.      Exon

c.       Transposons

d.      None of the above

The process of modification of RNA after transcription in which introns are removed and exons are joined is called:

a.       Splicing

b.      Recombination

c.       Translocation

d.      Assortment

A relatively short fragments of DNA synthesized on the lagging strand during DNA replication is called:

a.       Primer

b.      Okazaki fragment

c.       Klenow fragment

d.      None of the above

Which of the following is not a stop codon:

a.       AUG

b.      UAA

c.       UGA

d.      UAG

Which of the following is a start codon:

a.       AUG

b.      GUG

c.       Both

d.      None

Which of the following is incorrect about genetic code:

a.       It is non overlapping

b.      It is redundant

c.       It is ambiguous

d.      None of the above