St Anthonys College Shillong Model Question Paper : MCA, M.Sc Biotechnology Entrance Exam

Name of the Organisation : St Anthony’s College, Shillong (anthonys.ac.in)
Type of Announcement : Entrance Exam Model Question Paper MCA, M.Sc Biotechnology

Model Question Paper :
https://www.indianjobtalks.in/uploads/7808-MCA%20Entrance%20Exam%20Model%20Question%20Paper.pdf
https://www.indianjobtalks.in/uploads/7808-Model%20Question%20Paper%20MSc%20Biotechnology.pdf
Home Page : http://www.anthonys.ac.in/

M.Sc. (Biotechnology) : 2008
Part A
Directions: Choose the best answer from each of the following questions:
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
16. A bacterium on examination is found to lack superoxide dismutase, catalase and peroxidase. Which of the following statement best describes this bacterium?
a) This bacterium does not possess pilus.
b) This bacterium does not produce endotoxins.
c) This bacterium is an obligate anaerobe.
d) This bacterium will survive in an oxygen environment.
17. Selective inhibition of the synthesis of dipicolinic acid would inhibit the formation of the following structure:
a) Bacterial flagella b) Bacterial endospores
c) Sex pilus d) Glycocalyx
18. Uptake by a recipient cell of soluble DNA released from a donor cell is defined as:
a) Competence b) Conjugation
c) Transduction d) Transformation.
19. Bacterial spores are a problem in sterilization as they are:
a) Resistant to antibiotics
b) Resistant to physical and chemical agents
c) Easy to kill but are protected by organic matter
d) Most pathogenic bacteria are spore formers.
20. The iron scavenging compound produced by bacteria are called:
a) Siderophores b) Toxins
c) Lipopolysaccharides d) Lipoproteins
21. The following causes food–borne gastrointestinal illness:
a) Helicobacte b) Campylobacter
c) Arthrobacter d) Rhodobacter
22. Which of the following function to retard the desiccation of a bacterium?
a) Outer membrane b) Murein layer
c) Capsule d) Peptidoglycan
23. Pasteurization is designed to:
a) kill all living organisms present in the material being treated
b) make the material sterile
c) reduce the number of potentially harmful microorganisms
d) all the above.
24. Which one of the following is found in the outer membrane of bacteria?
a) Teichoic acids b) Capsules
c) Lipopolysaccharides d) Peptidoglycan
25. Biological oxygen demand helps to determine the:
a) extent of pollution in wastewater.
b) filtering capacity of soil.
c) types of biota in the ecosystem.
d) number of bacteria in a 100 ml sample of water.
26. Bacterial species of Thiobacillus and Beggiatoa play important role in:
a) water cycle on earth b) phosphorus cycle
c) sulphur cycle in soil d) breakdown of sewage.
27. Porins are located in:
a) Plasma membrane b) Outer membrane
c) Peptidoglycan d) S layer
28. The following bacterial transport mechanism is accompanied by a chemical change in the substance that is transported:
a) Active transport b) Facilitated diffusion
c) Group translocation d) Antiport transport
29. IL-2, TNF, IFN, TGF are names of:
a) hormones b) cytokines
c) receptors d) viruses
30. One of the following is an autoimmune disease:
a) rheumatoid arthritis b) myeloma
c) Burkitt’s lymphoma d) marasmus