Select the correct order of processing of PCR.

(1) Extension, primer annealing, denaturation

(2) Denaturation, primer annealing, extension

(3) Denaturation, extension, primer annealing

(4) Primer annealing, denaturation, extension

Subtopic:  Large Scale Production: I | Large Scale Production |
 85%
From NCERT
AIIMS - 2015
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Plasmid vector in DNA recombinant technology means

1. a virus that transfers gene to bacteria

2. extra-chromosomal autonomously replicating circular DNA

3. sticky end of DNA

4. any fragment of DNA carrying desirable gene

Subtopic:  Tools: Vectors: I | Tools |
 83%
From NCERT
AIIMS - 2015
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Which organism is used to transfer T-DNA?

(1) Streplomyces hygroscopicus

(2) Agrobacterium tumefaciens

(3) Salmonella typhi

(4) Escherichia coli

Subtopic:  Tools: Vectors: II | Tools |
 87%
From NCERT
AIIMS - 2015
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Match the following column I with column II.

Column I                                      Column II

A. Agrostology                              1. Earth

B. Smallest flowering plant            2. Genetic engineering

C. Tectonic                                   3.Migration

D. Ecesis                                      4.Wolffia

E. Euphanix                                  5.Grass

Codes

       A     B     C     D     E

(a)   5     4     1     3     2   

(b)   1     2     3     4     5

(c)   2     3     1     5     4

(d)   5     4     3     2     1

 62%
AIIMS - 2015
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Biolistic (gene gun) is suitable for

1. disarming pathogen vectors

2. transformation of plant cell

3. constructing recombinant DNA by joining with vectors

4. DNA fingerprinting

Subtopic:  Tools: Vectors: II | Tools |
 80%
From NCERT
AIIMS - 2015
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A mixture containing DNA fragments, a, b, c and d, with molecular weights of a+b = c, a > b and d>c, was subjected to agarose gel electrophoresis. The positions of these fragments from anode to cathode sides of the gel would be

(1) b, a, c, d

(2) a, b, c, d

(3) c, b, a, d

(4) b, a, d, c

Subtopic:  Process of Biotech |
 62%
AIIMS - 2012
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Which of the following DNA sequences qualifies to be designated as a palindrome?

(1) 5 - GACCAG - 3’ in one strand

(2) 3’- GACCAG - 5’ in one strand

(3) 5’- GACGAG- 3’ 3’- CTGGTC - 5’

(4) 5’- AGCGCT - 3’ 3’- TCGCGA - 5’

Subtopic:  Tools: Enzymes: II | Tools |
 82%
From NCERT
AIIMS - 2012
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The source of taq polymerase used in PCR is a

(1) thermophilic fungus

(2) mesophilic fungus

(3) thermophilic bacterium

(4) halophilic bacterium

Subtopic:  Large Scale Production: I | Large Scale Production |
 93%
From NCERT
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pBR322, which is frequently used as a vector for cloning gene in E. coli is a/an

1. original bacterial plasmid

2. modified bacterial plasmid

3. viral genome

4. transposon

Subtopic:  Tools: Vectors: II | Tools |
 71%
AIIMS - 2010
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Which of the following statement is not true: 

(1) Transformation is a procedure through which a piece of DNA is introduced in a host bacterium

(2) Normally, the genes encoding resistance to antibiotics are considered useful selectable markers for E.coli

(3)  The normal E.coli cells do not carry resistance against antibiotics such as ampicillin, chloramphenicol, tetracycline or kanamycin

(4) Presence of one recognition sites within the vector will generate several fragments, which will complicate the gene cloning

Subtopic:  Tools: Vectors: I | Tools |
 68%
From NCERT
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