Science (English Medium) Class 12 - CBSE Question Bank Solutions for Biology

The vitamin whose content increases following the conversion of milk into curd by lactic acid bacteria is ______.

Big holes in Swiss cheese are made by ______.

Why does ‘Swiss cheese’ have big holes?

What is the source organism for ECORI, restriction endonuclease?

Which species of Penicillium produces Roquefort cheese?

Name a microbe used for the production of Swiss cheese.

Which type of food would have lactic acid bacteria? Discuss their useful application.

The transfer of genetic material from one bacterium to another through the mediation of a viral vector is termed as ______.

Which of the following is not required in the preparation of a recombinant DNA molecule?

The most important feature in a plasmid to serve as a vector in gene cloning experiment is ______.

Who among the following was awarded the Nobel Prize for the development of PCR technique?

What is the significance of adding proteases at the time of isolation of genetic material (DNA)?

Name a recombinant vaccine that is currently being used in vaccination programme.

What is meant by gene cloning?

Both a wine maker and a molecular biologist who had developed a recombinant vaccine claim to be biotechnologists. Who in your opinion is correct?

A recombinant DNA molecule was created by ligating a gene to a plasmid vector. By mistake, an exonuclease was added to the tube containing the recombinant DNA. How does this affect the next step in the experiment i.e. bacterial transformation?

What would happen when one grows a recombinant bacterium in a bioreactor but forget to add antibiotic to the medium in which the recombinant is growing?

What is the expanded form of IUCN?

Why are the conventional methods not suitable for the assessment of biodiversity of bacteria?

What could be the possible explanation for greater vulnerability of amphibians to extinction as compared to other animal groups?