Reverse transcriptase is

(1) RNA-dependent RNA polymerase

(2) RNA-dependent DNA polymerase

(3) DNA-dependent RNA polymerase

(4) DNA-dependent DNA polymerase

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

Which is a natural genetic engineer of the plants?

The thermostable enzyme Taq polymerase used in PCR technique was discovered by

(1)Alec Jeffrey

(2)Karry Mullis

(3)Temin

(4)Baltimore

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

(1)20%

(2)40%

(3)30%

(4)60%

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

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

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

If a codon consists of 3 bases and there are 5 different nitrogenous bases altogether. How many codons will be there?

(1)61

(2)125

(3)27

(4)64

If a DNA have 5000 bases , and amount of adenine is 15% then find out the number of nucleotide of guanine

(1)1750

(2)3500

(3)7000

(4)975