Indian Institute of Technology New Delhi - (IIT) 2012 B.Sc Biotech, Bioinformatics, Computer Science IIT jam - Question Paper
Wednesday, 23 January 2013 04:55Web
trend of ques. : MCQs
Attempt ALL the objective ques. (Questions 1-100).
every of these ques. carries 3 marks.
1 negative mark for every wrong
answer.
IIT-JAM - BIOTECHNOLOGY
1-C-8, Sheela Chowdhary Road, Talwandi, Kota (Raj.) Tel No. 0744-2429714
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Total marks : 300
Duration of test : three Hours
1. Chylomicrons that enter the lacteals are composed of
(A) Triglycerides alone
(B) Triglycerides around a protein core
(C) Protein coat around triglycerides
(D) Proteins alone
2. During a reduction reaction which occurs in metabolism
(A) Electrons are lost from a substrate molecule
(B) Large amounts of energy are usually found
(C) Electrons are added to a substrate molecule
(D) The substrate molecules are oxidized.
3. Which of the subsequent single nucleotide mutations in an mRNA codon is most likely to be a "silent"
mutation?
(A) five CAU3 ® CUU
(B) five UUU ® UUC
(C) five AGA ® CGA
(D) five GUG ® GGG
4. Nucleic acid sequence is normally determined using which of the subsequent techniques?
(A) Agarose gel electrophoresis
(B) Capillary electrophoresis
(C) Starch gel electrophoresis
(D) Denaturing polyacrylamide gel electrophoresis
5. Individual cells can be identified by using:
(A) Marker enzyme
(B) Flow cytometry
(C) Rate zonal centrifugation
(D) Equilibrium density gradient centrifugation
6. Ribozyme is
(A) Catalytic RNA which catalyses both synthesis and degradation of small oligonucleotides
(B) Derivative of vitamin riboflavin
(C) Name of the scientist who discovered ribosomes
(D) None of the aboveFor CSIR UGC NET, GATE (ENGINEERING), GATE (Science), IIT-JAM, GATE, UGC NET, TIFR, Iisc etc.
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7. In the laboratory the type of mRNA triplet oligomer that occurs most readily by nonenzymatic reaction
is (R = purine ,Y = pyrimidine)
(A) RRR
(B) YRY
(C) YYY
(D) RRY
8. A gene inherited from a female is not expressed in either male or female offspring, but the identical
gene is expressed in both male and female offspring when inherited from a male. This can be
example of gene
(A) Recombination
(B) Repression
(C) Deletion
(D) Imprinting
9. DNA that is located within genes and is not used to specify a product but is discarded during RNA
processing is known as
(A) Intron DNA
(B) Exon DNA
(C) Spacer DNA
(D) Regulatory DNA
10. What characteristic introns have being cut from a pre mRNA?
(A) Linear structure
(B) Circular form
(C) Lariat shaped
(D) Theta structure For CSIR UGC NET, GATE (ENGINEERING), GATE (Science), IIT-JAM, GATE, UGC NET, TIFR, Iisc etc.
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Page 4
11. A typical animal cell contains:
(A) three × 10
9
nucleotides
(B) three × 10
2
nucleotides
(C) three × 10
4
nucleotides
(D) three × 10
5
nucleotides
12. Which antibody can block bacterial attachment to mucosal epithetical cells, which is the 1st line of
defense against host function?
(A) IgG
(B) IgA
(C) IgM
(D) IgE
13. Immune complexes can form in different regions of the body including the skin joints & kidneys. When
the complexes form in the skin a condition called _____________ can outcome. This condition is
characterized by butterfly shaped rash on the skin in the joints immune complexes can lead to a
condition called __________
(A) Rheumatoid arthritis, systemic lupus erythematosis
(B) Systemic lupus erythematosis, rheumatoid arthritis
(C) Systemic lupus erythematosis, sickle cells anemia.
(D) Rheumatoid arthritis, sickle cell anemia.
14. Which of the subsequent is not a member of the immunoglobulin super gene family?
(A) Antibodies
(B) lymphokines
(C) MHC glycoprotein
(D) T - cell receptors For CSIR UGC NET, GATE (ENGINEERING), GATE (Science), IIT-JAM, GATE, UGC NET, TIFR, Iisc etc.
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Page 5
15. What type of genomes do retroviruses have?
(A) 1 copy of plus ssRNA
(B) 1 copy of minus ssRNA
(C) 2 copies of plus ssRNA
(D) 2 copies of minus ssRNA
16. Which is not retrovirus?
(A) Oncovirus
(B) Lent virus
(C) Spumavirus
(D) Rub virus
17. select the actual & false statements:-
(A) Preen gland is obtained in birds & helps in keeping feathers oily
(B) Osphridlum is an organ of olfaction in molluscs
(C) Tentacles are sensory organs of echinoderms
(D) Statocyst is the balancing organ of invertebrates
(A) T, T, F, T
(B) F, T, F, T
(C) T, F, F, T
(D) T, F, T, F
18. A compound that transfers reducing equivalent from mitochondria to the cytosol during
gluconeogenesis is:
(A) Phosphoenolpyruvate
(B) Glycerol 3-phosphate
(C) Aspartate
(D) Malate
19. The transition from G2
to M phase takes place:
(A) By activation of Thr 161.
(B) By dephosphorylation of Tyr 15, Thr 14
(C) Both A and B
(D) None of the above. For CSIR UGC NET, GATE (ENGINEERING), GATE (Science), IIT-JAM, GATE, UGC NET, TIFR, Iisc etc.
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Page 6
20. Cell cycle regulator in all eukaryotes is:
(A) MPF (maturation promoting factor)
(B) Cyclin dependent kinase 1
(C) Cyclin
(D) None of the above.
21. Algae have cell wall made up of
(A) Cellulose, galactans and mannans
(B) Hemicellulose, pectins and proteins
(C) Pectins, cellulose and proteins
(D) Cellulose, hemicellulose and pectins
22. a few hyperthermophilic organisms that grow in highly acidic (pH2) habitats belong to the 2 groups
called:
(A) Eubacteria and archaea
(B) Cyanobacteria and diatoms
(C) Protists and mosses
(D) Liverworts and yeasts
23. Apomictic embryos in Citrus arise from
(A) Synergids
(B) Maternal sporophytic tissue in ovule
(C) Antipodal cells
(D) Diploid egg
24. Transfer of pollen grains from the anther to the stigma of a different flower of the identical plant is called
(A) xenogamy
(B) Geitonogamy
(C) Karyogamy
(D) Autogamy
25. Penicillin, an antibiotic is produced by
(A) Pencillium chrysogenum
(B) P. glacum
(C) P. patulum
(D) P. griseofulvin For CSIR UGC NET, GATE (ENGINEERING), GATE (Science), IIT-JAM, GATE, UGC NET, TIFR, Iisc etc.
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Page 7
26. Iludin, an antibiotic is produced by
(A) Fusarium oxysporium
(B) Penicillium illudens
(C) Clitocybe illudens
(D) Ustilago illudens.
27. A description of the wavelengths absorbed by a pigment is called its?
(A) Electromagnetic properties.
(B) Electromagnetic spectrum
(C) Absorption spectrum
(D) Action spectrum.
28. The pigment molecules of a chloroplast are located?
(A) Within its thylakoid membranes.
(B) Within its intrathylakoid spaces.
(C) Within its inner membrane.
(D) Within the space ranging from its inner and outer membranes.
29. Which of the subsequent statement about facilitated diffusion is incorrect?
(A) The rate of transport is greater than simple diffusion.
(B) The process is specific
(C) The rate of transport is directly proportional to concentration gradient
(D) The process is not accompanied by perm eases.
30. Which of the subsequent are aerobic bacteria?
(A) Nitrosomonas
(B) Nitrobacter
(C) Thiobacillus
(D) All of these
31. Energy and nutrients enter a community by way of the For CSIR UGC NET, GATE (ENGINEERING), GATE (Science), IIT-JAM, GATE, UGC NET, TIFR, Iisc etc.
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Page 8
(A) Producers.
(B) Consumers.
(C) Scavengers.
(D) Detrivores.
32. A sequence of species through which the organic molecules in a community pass is called a
(A) Pyramid of energy.
(B) Food chain.
(C) Food web.
(D) Nutrient cycle.
33. On which of the subsequent does aldosterone exert its greatest effect?
(A) Glomerulus
(B) Cortical collecting duct
(C) Thin portion of the loop of Henle
(D) Thick portion of the loop of Henle
34. The original function of the vertebrate stomach was
(A) Storage
(B) Digestion
(C) Enzyme secretion
(D) Absorption
35. Slit-pores are current in the walls of
(A) Glomerular capillaries
(B) Inner layer of Bowmans capsule
(C) Peritubular capillaries
(D) Vasa recta For CSIR UGC NET, GATE (ENGINEERING), GATE (Science), IIT-JAM, GATE, UGC NET, TIFR, Iisc etc.
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Page 9
36. In the human female, menstruation can be deferred by the administration of
(A) Combination of FSH and LH
(B) Combination of estrogen and progesterone
(C) FSH only
(D) LH only
37. If a person indicates production of interferons in his body, the chances are that he has got an infection
of –
(A) Typhoid
(B) Measles
(C) Malaria
(D) Tetanus
38. Which kind of cancer affects lymph nodes and spleen?–
(A) Carcinoma
(B) Sarcoma
(C) Leukemia
(D) Lymphoma
39. 1 of the most remarkable features of evolution is the formation of amnion & the allantois which
appeared for the 1st time in:-
(A) Amphibians
(B) Fishes
(C) Birds
(D) Reptiles
40. Evolution is often referred to as speciation. Which in the most accurate statement with respect to
speciation:-
(A) Inheritance of gene pool from 1 generation to another,
(B) Origin of new character in a group of geographically isolated individuals.For CSIR UGC NET, GATE (ENGINEERING), GATE (Science), IIT-JAM, GATE, UGC NET, TIFR, Iisc etc.
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Page 10
(C) Origin of distinct physical identities amongst races which are located in various geographical
location.
(D) Origin of reproductive isolation amongst the races of a provided species.
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