#Question id: 39506
#Biochemistry
Regarding non-coding DNA:
I. It includes regulatory sequences
II. It plays no role in gene expression
III. It includes introns and repetitive DNA
#Question id: 39507
#Biochemistry
Concerning PCR:
I. Denaturation occurs at high temperature
II. Annealing involves primer binding
III. Extension is carried out by RNA polymerase
#Question id: 39508
#Biochemistry
Regarding transgenic crops:
I. They may reduce the need for chemical pesticides
II. They can raise ecological and ethical concerns
III. They are completely risk-free
#Question id: 39509
#Biochemistry
Assertion (A): DNA polymerase cannot initiate DNA synthesis de novo.
Reason (R): DNA polymerase requires a free 3′-OH group.
#Question id: 39510
#Environmental Science
Q. The most penetrating radiation is:
#Question id: 39511
#Biochemistry
Assertion (A): The lac operon is an inducible operon.
Reason (R): The operon is switched on in the presence of lactose.