The experiment of Harshay and Chase helped
confirm that DNA was the hereditary material on the basis of the finding that
………
a) radioactive phosphorus was found in
the cell
b) radioactive sulphur was found in the cell
c) radioactive phage were found in the supernatant
d) radioactive phage were found in the pellet
Bacteriophage virus contains……..
a) protein
b) RNA
c) DNA
d) both a and c
Explanation: protein capsid encapsulated the DNA
DNA Replication:
The process of
self-synthesis of DNA molecule is called DNA……..
a) formation
b) copying
c) replication
d) assimilation
In which of the following phase, DNA replication occurs once in the life cycle of a cell?
a) G1-phase
b) G2-phase
c) S- phase
d) mitotic phase
Explanation: S phase (Synthesis Phase) is the phase of the cell cycle in which DNA is replicated, occurring between G1 phase and G2 phase
Overall how many models explain the replication process of DNA?
a) two
b) three
c) ten
d) four
Explanation: semi-conservative model, conservative model and dispersive model
