How many times can the nuclear DNA replicate during the life cycle of a cell?

(1)Only once

(2)Twice

(3)Many times

(4)Does not replicate at all

Subtopic:  DNA Replication: I | DNA Replication |
 55%
Hints

In DNA replication, the two strands of a daughter DNA molecules are derived as follows

(1) one strand from parent DNA and the other freshly synthesized

(2) both strands from parent DNA

(3) both strands synthesized as templates on parent strands

(4) both strands synthesized on RNA templates of parent strands

Subtopic:  DNA Replication: I | DNA Replication |
 78%
From NCERT
Hints

DNA replication in most organisms is

(1)conservative and continuous

(2)semi-conservative but discontinuous

(3)semi-conservative and semi-discontinuous

(4)semi-conservative but continuous

Subtopic:  DNA Replication: I | DNA Replication |
 64%
From NCERT
Hints

Borne viruses do not have DNA. This suggests that

(1)They are non-infective viruses

(2)RNA is the genetic material in these viruses

(3)DNA is not the genetic material

(4)RNA is a self replicating molecule

Subtopic:  Transcription: I | Transcription |
 83%
Hints

The central dogma is

(1)Direction of flow of information from DNA→RNA→proteins

(2)the transfer of genetic information from same strand of DNA to m-RNA

(3)The faithful transfer of genetic information from DNA molecule to the next generation molecule through semi conservative mechanism

(4)Mendelism has established the principles of heredity

Subtopic:  Transcription: I | Transcription |
 92%
From NCERT
Hints

The core enzyme which requires the factor for termination of RNA synthesis at some sites is known as

(1)Sigma factor

(2)Rho factor

(3)Gamma factor

(4)Alpha particle

Subtopic:  Transcription: III | Transcription |
 91%
From NCERT
Hints

In a DNA% of T is 20% then what will be the % of G?

(1)20%

(2)40%

(3)30%

(4)60%

Subtopic:  The DNA |
 89%
Hints

Role of DNA in heredity was discovered for the first time through experiments involving

(1)Transformation using E.coli

(2)Transduction involving bacteriophage

(3)The use of enzymes protease and nuclease

(4)Transformation using heat killed virulent and living non virulent S.pneumoniae

Subtopic:  Search for Genetic Material:I | Search for Genetic Material |
 65%
Hints

In 125 amino acids, sequence of the codon for 25th amino acid is mutated to UAA, then

(1)A polypeptide of 24 amino acids is formed

(2) A polypeptide of 124 amino acids is formed

(3) A polypeptide of 25 amino acids is formed

(4) No polypeptides are formed

Subtopic:  Translation | Translation Mechanism |
 81%
Hints

If length of DNA is 1.36 mm , the number of base pair and nucleosomes in it will be

(1)4×10^12 and 2×10^4

(2)4×10^6 and 2×10^10

(3)4×10^6 and 2×10^4

(4) 4×10^6 and 2×10^12

Subtopic:  Solved Problems |
 63%
Hints