Determine the correctness or otherwise of the following Assertion [A] and the Reason [R].
Assertion [A]: Dam methylase protects E. coli DNA from phage endonucleases.
Reason [R]: E. coli Dam methylase methylates the adenosine residue in the sequence "GATC".
A. Both [A] and [R] are true and [R] is the correct reason for [A]
B. Both [A] and [R] are true but [R] is not the correct reason for [A]
C. Both [A] and [R] are false
D. [A] is false but [R] is true
Answer: Option D
A. No recombinant molecule will ever be detected
B. Both linear and circular molecules will replicate equally well
C. None of the plasmids will express the antibiotic resistance gene located on the plasmid
D. The circular molecules will be amplified by the cells
A. Addition of lactose to the medium
B. Removal of all glucose from the medium
C. Addition of excess glucose to the medium
D. Addition of allo-lactose to the medium
A. Both [A] and [R] are true and [R] is the correct reason for [A]
B. Both [A] and [R] are true but [R] is not the correct reason for [A]
C. Both [A] and [R] are false
D. [A] is false but [R] is true
A. P only
B. P, R and S only
C. P and R only
D. P, Q and R only
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