Assertion (A) Lac - operon is an inducible system
Reason (R) - Transcription occurs in the presence of lactose
A. If both (A) and (R) one true and (R) is the correct explanation of (A)
B. If both (A) and (R) are true but (R) is not the correct explanation of (A)
C. If (A) is true but (R) is false
D. If both (A) and (R) as false
Answer : Option A
A :- Operon concept was given by Hershey and chase
R : - Separation of DNA fragments are done by centrifugation technique
A. If both (A) and (R) one true and (R) is the correct explanation of (A)
B. If both (A) and (R) are true but (R) is not the correct explanation of (A)
C. If (A) is true but (R) is false
D. If both (A) and (R) as false
Answer : Option D
A :- DNA is cut into Sections by using restriction endonucleases
R : - Ligase is used to join DNA nucleotides
A. If both (A) and (R) one true and (R) is the correct explanation of (A)
B. If both (A) and (R) are true but (R) is not the correct explanation of (A)
C. If (A) is true but (R) is false
D. If both (A) and (R) as false
Answer : Option B
A:- Abraham Lincon has been analyzed for evidence of a genetic disorder called Marfan’s syndrome
R :- An additional benefit of DNA fingerprint technology is the diognos is of inherited disorders
A. If both (A) and (R) one true and (R) is the correct explanation of (A)
B. If both (A) and (R) are true but (R) is not the correct explanation of (A)
C. If (A) is true but (R) is false
D. If both (A) and (R) as false
Answer : Option B
A :- Helicase is called unwindase
R :- DNA helix uncoils and splits into single strands by breaking of hydrogen bonds between
complementary bases
A. If both (A) and (R) one true and (R) is the correct explanation of (A)
B. If both (A) and (R) are true but (R) is not the correct explanation of (A)
C. If (A) is true but (R) is false
D. If both (A) and (R) as false
Answer : Option A
A :- Formation of Lagging strand is slow
R : - Formation of lagging strand begins bit later than that of leading strand
A. If both (A) and (R) one true and (R) is the correct explanation of (A)
B. If both (A) and (R) are true but (R) is not the correct explanation of (A)
C. If (A) is true but (R) is false
D. If both (A) and (R) as false
Answer : Option A
A - Doublet codons are inadequate for 20 types of aminoacids
R - One aminoacid can be coded by many codons in triplet gentic code
A. If both (A) and (R) one true and (R) is the correct explanation of (A)
B. If both (A) and (R) are true but (R) is not the correct explanation of (A)
C. If (A) is true but (R) is false
D. If both (A) and (R) as false
Answer : Option B
A:- Mutations effect protein structure and function
R :- Only one changed codon may be mis sense when it changes insertion of one aminoacid
A. If both (A) and (R) one true and (R) is the correct explanation of (A)
B. If both (A) and (R) are true but (R) is not the correct explanation of (A)
C. If (A) is true but (R) is false
D. If both (A) and (R) as false
Answer : Option A
A:- Catching criminals could become easier and quicker using DNA fingerprints
R :- The process begins with blood or cell sample from which DNA is extracted
A. If both (A) and (R) one true and (R) is the correct explanation of (A)
B. If both (A) and (R) are true but (R) is not the correct explanation of (A)
C. If (A) is true but (R) is false
D. If both (A) and (R) as false
Answer : Option B
A :- Dr. Hargobind Khorana Synthesized one gene of yeast containing 77 nucleotides
R:- Nirenberg synthesized more complex gene in rabbit which contains 650 nucleotides.
A. If both (A) and (R) one true and (R) is the correct explanation of (A)
B. If both (A) and (R) are true but (R) is not the correct explanation of (A)
C. If (A) is true but (R) is false
D. If both (A) and (R) as false
Answer : Option C