NEET BIOLOGY

GENETICS AND EVOLUTION

MOLECULAR BASIS OF INHERITANCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In DNA replication each newly made strand is
A
identified in DNA sequence to the strand from which it was copied
B
complementary in sequence to the strand from which it was copied
C
oriented in the same 3’ to 5’ direction as the strand from which it was copied
D
an incomplete copy of one of the parental strands
Explanation: 

Detailed explanation-1: -During DNA replication, each of the two strands that make up the double helix serves as a template from which new strands are copied. The new strand will be complementary to the parental or “old” strand. Each new double strand consists of one parental strand and one new daughter strand.

Detailed explanation-2: -mRNA is formed as a complementary strand to one of the two strands of the DNA. Three of the four nitrogenous bases that make up RNA-adenine (A), cytosine (C), and guanine (G)-are also found in DNA.

Detailed explanation-3: -DNA is always synthesized in the 5’-to-3’ direction, meaning that nucleotides are added only to the 3’ end of the growing strand.

There is 1 question to complete.