Cell Cycle and Cell Division — BIOLOGY STD 11 Science — Question

Define vital capacity. What is its significance?

Describe the steps of catalytic cycle of an enzyme action. Write any two factors which affect the enzymatic action.

OR

Describe the steps of catalytic action of an enzyme, till the formation of product.

OR

Describe the steps of catalytic cycle of an enzyme action.

Differentiate between cerebrum and cerebellum.

Phylum that doesn't have a true coelom is:

1. Platyhelminthes.
2. Annelida.
3. Echinoderms.
4. Arthropoda.

Name three phases of interphase. Give one major event of each phase.

Write the differences between:
(c) Systole and Diastole

Write any four benefits of frog to mankind.

What is the structural and functional unit of kidney called? Make a labelled diagram of it.

Excretion is an important process as it helps in getting rid of waste from the body. Which of these is similar to this fact? What is the importance of maintaining cleanliness at public places?

1. Cleaning our home is necessary to create a healthy place for living.
2. Garbage should be thrown out every day.
3. Garbage dumping sites should be far away from the city limits.

Name two hormones that are chemically amino acid derivatives.