Science (English Medium) कक्षा ११ - CBSE Question Bank Solutions for Biology

Frogs are beneficial for mankind, justify the statement.

Draw a neat and well labelled diagram of male reproductive system of a frog.

Which of the following statements is true for a secretory cell?

What is a tonoplast?

What is the significance of vacuole in a plant cell?

Mention a single membrane bound organelle which is rich in hydrolytic enzymes.

Explain the association of carbohydrate to the plasma membrane and its significance.

What are different classes of enzymes? Explain any two with the type of reaction they catalyse.

Why is RuBisCo enzyme the most abundant enzyme in the world?

Why photorespiration does not take place in C₄ plants?

Monocarpic plants are those which ______.

Some varieties of wheat are known as spring wheat while others are called winter wheat. Former variety is sown, and planted in spring and is harvested by the end of the same season. However, winter varieties, if planted in spring, fail to flower or produce mature grains within a span of a flowering season. Explain, why?

It is known that some varieties of wheat are sown in autumn but are harvested around next mid summer.

What could be the probable reason for this?

It is known that some varieties of wheat are sown in autumn but are harvested around next mid summer.

What term is used for this promotion of flowering under low temperature?

It is known that some varieties of wheat are sown in autumn but are harvested around next mid summer.

Which plant hormone can replace the cold treatment?

Corpus luteum secretes a hormone called ______.

List the hormones secreted by the following:

Ovary

Write a short note on the functions of the following hormone:

Estrogens

Define the following term:

Superior ovary

Take one flower each of families Fabaceae and Solanaceae and write its semi-technical description. Also, draw their floral diagrams after studying them.