CSIR-UGC-NET-JRF Life Sciences- Cytology Previous Questions

Cytology Notes

  1. Among the following which cannot be a part of a gene (June 2006)

a) UUUUUUUU
b) AAAAAAAA
c) CATCATCAT
d) GCGCGCGC

2. The oxidative phosphorylation occurs at (June 2006)

a) inner membrane of mitochondria
b) cytoplasm
c) chloroplast
d) vacuole

3. The mode of action of antibiotic penicillin is (June 2006)

a) It inhibits glycolase moiety of cell wall enzyme
b) antibiotic is not allowed to enter the cell
c) It deactivates membrane transport
d) Antibiotic is exclude by membrane

4. Which is true about Mitosis Promoting Factor (MPF) (June 2006)

a) Control the replication of DNA
b) Its concentration can be sensed during G1
c) Its concentration can be sensed during S
d) concentration cyclically varies during entire M phase

5. Among the following which process do not occur in nucleus

a) Replication
b) Repair
c) Transcription
d) Translation

6. Among the following which is characteristic feature of meiosis I (June 2006)

a) Separation of chromatids
b) Separation of homologous chromosomes
c) Doubling of DNA content
d) Movement of chromosome towards poles

7. The repeating structure common in Haemoglobin, chlorophyll and cytochrome is (June 2006)

a) Pentose
b) Porphyrin
c) Benezene
d) Phenol

8. Which of the following histone protein is not involved in nucleosome assembly? (June, 2006)

a) H1
b) H2A
c) H2B
d) H4

9. The most variable stage of cell cycle is (June, 2006)

a) G1
b) G2
c) G0
d) S

10. Among the following which gene is not associated with induction of cancer? (June 2006)

a) Src
b) Ras
c) Actin
d) p53

11. The Eukaryotic mitochondria is more similar to (June, 2006)

a) Virus
b) protists
c) moulds
d) bacteria

12. Which is true for gap junction (June, 2006)

a) it is made up of connexion protein
b) allows free movement of large molecules across cells
c) made up of two subunits of connexons
d) movement of gases takes place through gap junction

13. Dosage compensation in mammalian females is achieved by (June, 2006)

a) methylation of one x chromosome
b) hyperactivation of one X chromosome
c) elimination of one x chromosome
d) hyperactivation of both x chromosome

14. Which of the following gene is involved in apoptosis (June, 2006)

a) caspase
b) cyl2
c) bxl
d) apc

15. DNA is destabilised by (June, 2006)

a) formamide
b) Polyglycine
c) Sucrose
d) PEG

Answers

1. a) UUUUUUUU
2. a) inner membrane of mitochondria
   
3. a) It inhibits glycolase moiety of cell wall enzyme
   
4. d) concentration cyclically varies during entire M phase
   
5. d) Translation
6. b) Separation of homologous chromosomes
7. b) Porphyrin
8. a) H1
9. a) G1
10. c) Actin
11. d) bacteria
12. a) it is made up of connexion protein
13. a) methylation of one x chromosome
14. a) caspase
15. a) formamide

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