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1
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

Refer to the following statements for agarose-gel electrophoresis:

(a) Agarose is a natural polymer obtained from sea-weed.

(b) The separation of DNA molecules in agarose-gel electrophoresis depends on the size of DNA.

(c) The DNA migrates from negatively-charged electrode to the positively-charged electrode

(d) The DNA migrates from positively-charged electrode to the negatively-charged electrode.

Choose the most appropriate answer from the options given below :

A
(b), (c) and (d) only
B
(a) and (b) only
C
(a), (b) and (c) only
D
(a), (b) and (d) only
2
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Polymerase chain reaction is used in DNA amplification.

Reason (R) : The ampicillin resistant gene is used as a selectable marker to check transformation.

In the light of the above statements, choose the correct answer from the options given below :

A
Both (A) and (R) are correct and (R) is the correct explanation of (A)
B
Both (A) and (R) are correct but (R) is not the correct explanation of (A)
C
(A) is correct but (R) is not correct
D
(A) is not correct but (R) is correct
3
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

Which one of the following statement is not true regarding gel electrophoresis technique?

A
The process of extraction of separated DNA strands from gel is called elution.
B
The separated DNA fragments are stained by using ethidium bromide.
C
The presence of chromogenic substrate gives blue coloured DNA bands on the gel.
D
Bright orange coloured bands of DNA can be observed in the gel when exposed to UV light.
4
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

Given below are two statements:

Statement I : Restriction endonucleases recognise specific sequence to cut DNA known as palindromic nucleotide sequence.

Statement II : Restriction endonucleases cut the DNA strand a little away from the centre of the palindromic site.

In the light of the above statements, choose the most appropriate answer from the options given below :

A
Both Statement I and Statement II are correct
B
Both Statement I and Statement II are incorrect
C
Statement I is correct but Statement II is incorrect
D
Statement I is incorrect but Statement II is correct
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