Model Question Paper MSc Biotechnology Entrance Exam St Anthony's College : www.anthonys.ac.in

[hemalathaijt]

St Anthony's College, Shillong,
M.Sc. (Biotechnology) : 2008
Part A
Directions: Choose the best answer from each of the following questions:

http://www.anthonys.ac.in/questions.html
Model Question Paper : http://www.anthonys.ac.in/downloads/q2008/MSc2008.pdf

1. DNA containing a genetic sequence that is to be cloned is referred to as
a) vector DNA b) donor DNA
c) single-stranded DNA d) host DNA

2. Bacterial enzymes that cut DNA at specific sites within the DNA molecule are called
a) exonucleases b) methylases
c) transferases d) restriction endonucleases

3. All of the following are common methods of experimentally introducing DNA into host cells except
a) transformation b) transduction
c) conjugation d) electroporation

4. Which of the following eukaryotic genera contain common cloning host cells?
a) Paramecium b) Saccharomyces
c) Penicillium d) Euglena

5. Sphaeroplasts lack the following cellular component
a) endoplasmic reticulum b) ribosomes
c) intact cell wall d) cytoskeleton

6. A prophage is
a) an auxotrophic mutant b) a gene
c) host DNA packed into viral heads d) a phage DNA incorporated into the host genome

7. Small circular molecules capable of self-replication are called
a) introns b) exons
c) plasmids d) transposable elements

8. Which of the following amino acids is specified by a single codon?
a) glutamine b) tryptophan
c) asparagine d) isoleucine

9. When a number of genes are transcribed as one mRNA, it is said to be:
a) multimeric b) polymeric
c) polycistronic d) polysomal

10. A protein structure on eukaryotic chromosomes to which spindle fibers bind is a:
a) telomere b) kinetochore
c) centromere d) centriole

11. An enzyme that phosphorylates a protein is known as:
a) a protein kinase b) phosphatase
c) kinase d) phosphorylase

12. The human embryo that consists of only two layers of cells is called
a) a blastocyst b) an embryonic disc
c) a placenta d) a yolk sac

13. Eukaryotic RNA that specifies proteins is modified before translation by
a) addition of a 5’ cap b) splicing of exons
c) addition of a 3’ poly-A tail d) all of the three

14. What is the chemical basis of gene imprinting?
a) methylation of DNA b) phosphorylation
c) oxidation of DNA d) glycosylation

15. The drug chloramphenicol blocks
a) cell-wall formation b) transcription
c) translation termination release factors d) polypeptide chain elongation

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