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Home » General Knowledge » General Science » Aptitude Test - 18
1.Which of the following is site specific recombination?
A. Modification
B. Transposition
C. Holiday junction
D. Modification
2.Who proposed holiday model for homologous recombination?
A. Gobind Khurana
B. Louis Pasteur
C. Robin Holiday
D. Gobind Khurana
3.10. 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
4.Which of the following is NOT a recombination system?
A. RecBCD
B. RecE
C. RecF
D. RecBCD
5.Name the phenomenon of allele replacement during recombination and DNA repair?
A. Replication
B. Mutation
C. Transversion
D. Replication
6.Name the protein, which is involved in homologous recombination in E.coli?
A. Topoisomerase
B. Gyrase
C. Helicase
D. Topoisomerase
7.12. Which of the following condition is TRUE for Calotropis?
A. a) Epiphyllous
B. b) Gynandrous
C. c) Epipetalous
D. a) Epiphyllous
8.1. Which of the following phylum is known for its asymmetrical body shape?
A. a) Mollusca
B. b) Arthropoda
C. c) Annelida
D. a) Mollusca
9.An enzyme which synthesis, DNA from RNA is called?
A. DNA polymerase
B. RNA polymerase
C. Nucleases
D. DNA polymerase
10.Name the bacterium from which Taq DNA polymerase derived?
A. Thermus aquaticus
B. Salmonella
C. Cyanobacteria
D. Thermus aquaticus
11.Name the enzyme which degrades DNA molecule by breaking its phosphodiester bonds?
A. DNA polymerase
B. Nucleases
C. Ligase
D. DNA polymerase
12.Which of the following is NOT an endonuclease?
A. Mung bean nuclease
B. S1 nuclease
C. Terminal deoxynucleotidal transferase
D. Mung bean nuclease
13.Which of the following endonuclease has been purified from Aspergillus oryzae?
A. S1 nuclease
B. RNase H
C. RNase A
D. S1 nuclease
14.Name the enzyme which degrade dsDNA after recognizing specific nucleotide sequences?
A. RNase H
B. Restriction endonuclease
C. DNA polymerase
D. RNase H
15.Which of the following is NOT the property of restriction enzymes?
A. Recognizes palindromic sequences
B. Two fold axial symmetry
C. Cut down randomly
D. Recognizes palindromic sequences
16.2. Name the phylum which has a single opening for taking food and throwing out faeces?
A. a) Coelenterate
B. b) Porifera
C. c) Annelida
D. a) Coelenterate
17.Which of the following type of restriction enzyme does not require ATP for cleavage?
A. Type I
B. Type II
C. Type III
D. Type I
18.Name the restriction enzyme which recognizes different sequences, but produces same ends?
A. DAM methylase
B. Isoschizomers
C. Neoschizomers
D. DAM methylase
19.Which enzyme join DNA molecules together?
A. Polymerase
B. Nucleases
C. Ligases
D. Polymerase
20.3. Name the organism which has flame-cell in its excretory system?
A. a) Corals
B. b) Ctenophora
C. c) Roundworm
D. a) Corals
21.Circular DNA used for cloning is called?
A. DNA polymerase
B. RNA polymerase
C. Phagosome
D. DNA polymerase
22.4. Which of the following is causative agent of Trichionosis?
A. a) Trichinella spiralis
B. b) Oxytricha trifallax
C. c) Morus nigra
D. a) Trichinella spiralis
23.Which of the following is NOT a cloning vector?
A. Bacterial plasmid
B. Cosmids
C. Bacteriophage
D. Bacterial plasmid
24.Cloning vector has the following properties, except one?
A. Contain genetic marker for selection
B. Ability to replicate
C. Multiple restriction site for entry of DNA
D. Contain genetic marker for selection
25.Which of the following is NOT the characteristics of the plasmid?
A. Replicate independently in a host cell
B. Selectable marker gene
C. Contain single cloning site
D. Replicate independently in a host cell
26.5. Intestinal fluke disease is caused by phylum__________
A. a) Ctenophora
B. b) Platyhelminthe
C. c) Annelida
D. a) Ctenophora
27.Which of the following is TRUE for YAC?
A. Recognizes palindromic sequences
B. Two fold axial symmetry
C. Recognize specific site according to DNA sources
D. Recognizes palindromic sequences
28.Which of the following is NOT an example of Lambda phages?
A. EMBL3
B. M13
C. λgt10
D. EMBL3
29.Name the vector system used for plant transformation?
A. Agrobacterium
B. Cosmids
C. M13 phage
D. Agrobacterium
30.Name the first vector used for a mammalian cell?
A. Lambda phage
B. SV40
C. M13
D. Lambda phage
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