ISC (Science) ISC Class 12 - CISCE Question Bank Solutions for Biology (Theory)

What is the role of a probe in recombinant DNA technology?

Give any four advantages of mutation breeding.

Mention the location and the function of Leydig cells.

Riya went to the hospital to meet her sister who was undergoing some treatment. The hospital was crowded with patients suffering from various types of allergies, pneumonia and Ascariasis. Name the disease that Riya is most likely to get infected with. Give one reason for your answer.

Give the name of the target pest of gene cry 1 Ac.

The figure given below shows the early stage of the development of microsporangium.

Name the hypodermal cell labelled '1' which divides periclinally.

Microbes are useful to human beings in diverse ways. Give the biological name of the following microbe:

Lactic acid producing bacterium.

Microbes are useful to human beings in diverse ways. Give the biological name of the following microbe:

Microbe known as Baker's yeast.

Microbes are useful to human beings in diverse ways. Give the biological name of the following microbe:

Fungus which helps in the production cyclosporin-A.

Microbes are useful to human beings in diverse ways. Give the biological name of the following microbe:

Microbe used in the production of statins.

Draw a neat and well labelled diagram of T.S. of the mammalian ovary.

The table given below shows the Area, Y-intercept and regression coefficient of the continents namely, Africa and Europe. Study the table carefully and answer the questions that follow:

1. Calculate the species richness (S) of each continent.
2. Which of these continents shows a higher biodiversity?
3. State any two factors that cause an increase in biodiversity.

1. Will this pollination give the desired results? Give a reason for your answer.
2. What is geitonogamy? Why is it considered equivalent to cross-pollination in ecological context and self-pollination in genetic context?

Which is the most commonly prescribed non-steroidal oral contraceptive pill in India?

Assertion: E. coli was transformed by inserting the foreign DNA by using Pvul in pBR322.

Reason: It was done to make the transformed cells survive in the culture medium containing ampicillin.

Give a reason for the following:

The continuous inbreeding of crops may lead to reduced fertility and productivity. However, the self-pollinated crops do not show the ill-effects of inbreeding.

Samson and Dorothy surveyed two islands, ‘A’ and ‘B’. They recorded the relevant data in the following format in their research folder:

1. Derive the species-richness for each island.
2. Which island exhibits greater biodiversity? Support your answer with a reason.

What is mycoherbicide?

Explain the term chemogeny

Define Racemose inflorescence