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Hassan
1.The basic structure of antibodies are______
A. Y-shaped
B. X-shaped
C. Linear
D. Y-shaped
2.Name the part of a chromosome where t-loop is found.
A. Telomere
B. Centromere
C. Acromere
D. Telomere
3. Name the heavy chain of immunoglobulin G.
A. μ
B. ε
C. α
D. μ
4.Name the unit of replication?
A. DNA
B. Gene
C. Replicon
D. DNA
5.Which of the following phase is involved in the conversion of chromatin to chromosome?
A. S- phase
B. M- phase
C. G2- phase
D. S- phase
6.6. Which of the following is a seedless vascular plant?
A. a) Gymnosperm
B. b) Bryophytes
C. c) Pteridophytes
D. a) Gymnosperm
7.Name the basic structural unit of chromatin, which is described by R.Kornberg?
A. Scaffold protein
B. Solenoid
C. 30nm fiber
D. Scaffold protein
8.What are protamines?
A. Large size DNA
B. Sequences that are unique
C. Highly repetitive DNA
D. Large size DNA
9.Name the protein, which maintained the condensed structure of chromosomes.
A. HSP
B. SMC
C. Collagen
D. HSP
10.Mark the process which does not involve in histone modification?
A. Acetylation
B. Methylation
C. Phosphorylation
D. Acetylation
11.Double-helix structure of DNA is discovered by?
A. Gobind Khurana
B. Nirenberg
C. Watson and Crick
D. Gobind Khurana
12.What is a mode of replication in E.coli?
A. Intermediate
B. Dispersive
C. Conservative
D. Intermediate
13.7. Which of the following is also known as fruitless plants?
A. a) Gymnosperm
B. b) Bryophytes
C. c) Pteridophytes
D. a) Gymnosperm
14.What is the origin of replication?
A. Particular site at which DNA replication starts
B. Site which prevents initiation
C. Random location on the DNA
D. Particular site at which DNA replication starts
15.How many numbers of replicon is found in E.coli?
A. Five replicon
B. Two replicon
C. Single replicon
D. Five replicon
16.Which of the following protein does not involve in the initiation of replication?
A. DnaA
B. SSB (Single strand binding protein)
C. DnaB
D. DnaA
17.Which of the following protein is required for connecting Okazaki fragments?
A. Scaffold protein
B. Helicase
C. Primase
D. Scaffold protein
18.Name the protein, which is used for termination of replication?
A. DnaC
B. SSB
C. Tus protein
D. DnaC
19.Which of the following would relax negatively supercoiled DNA?
A. DNA gyrase
B. Type I topoisomerase
C. Collagen
D. DNA gyrase
20.8. Double fertilization is a characteristic feature of which of these groups of plants?
A. a) Chlorophyta
B. b) Thallophyta
C. c) Angiosperm
D. a) Chlorophyta
21.Name the protein, which is responsible for the formation of RNA primer?
A. Topoisomerase
B. Gyrase
C. Helicase
D. Topoisomerase
22.Rearrangement of DNA that involves the breakage and reunion of DNA is called?
A. Replication
B. Recombination
C. Translation
D. Replication
23.9. Which of the following is NOT the part of four whorls of flower leaves?
A. a) Calyx
B. b) Corolla
C. c) Androcium
D. a) Calyx
24.Which of the following is NOT true about homologous recombination?
A. Exchange of homologous segments
B. Exchange takes place between two homologous DNA molecules
C. It is also termed as general recombination
D. Exchange of homologous segments
25.Which of the following is site specific recombination?
A. Modification
B. Transposition
C. Holiday junction
D. Modification
26.Who proposed holiday model for homologous recombination?
A. Gobind Khurana
B. Louis Pasteur
C. Robin Holiday
D. Gobind Khurana
27.10. Melia, a flower has a pistil of two or more fused carpels, which of the following condition describe this?
A. a) One carpel
B. b) Fused carpel
C. c) Fused androcium
D. a) One carpel
28.Which of the following is NOT a recombination system?
A. RecBCD
B. RecE
C. RecF
D. RecBCD
29.Name the phenomenon of allele replacement during recombination and DNA repair?
A. Replication
B. Mutation
C. Transversion
D. Replication
30.Name the protein, which is involved in homologous recombination in E.coli?
A. Topoisomerase
B. Gyrase
C. Helicase
D. Topoisomerase
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