Science (English Medium) इयत्ता १२ - CBSE Question Bank Solutions for Biology

In some viruses, RNA is present instead of DNA indicating that ______.

In a DNA strand the nucleotides are linked together by ______.

A nucleoside differs from a nucleotide. It lacks the ______.

Both deoxyribose and ribose belong to a class of sugars called ______.

The fact that a purine base always paired through hydrogen bonds with a pyrimidine base leads to, in the DNA double helix ______.

Who amongst the following scientists had no contribution in the development of the double helix model for the structure of DNA?

While analysing the DNA of an organism a total number of 5386 nucleotides were found out of which the proportion of different bases were: Adenine = 29%, Guanine = 17%, Cytosine = 32%, Thymine = 17%. Considering the Chargaff’s rule it can be concluded that ______.

What is the nature of the strands of the DNA duplex?

Protein helping in opening of DNA double helix in front of replications fork is ______.

Temperature of the scrotum which is necessary for the functioning of testis is always ______ around below body temperature.

Prostate glands are located below ______.

The function of the secretion of prostate gland is to ______.

In the F₂ generation of a Mendelian dihybrid cross the number of phenotypes and genotypes are ______.

How far is each base pair from the next one in DNA double helix model?

Synthesis of DNA from RNA is explained by ______.

Seminal plasma in human males is rich in ______.

The primary sex organ of a human male is ______.

Each gamete carry ______.

If 30 percent of an organism’s DNA is thymine, then ______.

H-bonds between Cytosine and Guanine are ______.