Chemical Coordination and integration — BIOLOGY STD 11 Science — Question

Name the parts of the body where smooth or non-striated muscles are present.

Differentiate between vascular tissues of gymnosperms and angiosperms.

How will you distinguish between tendons and ligaments?

Energy is released during the oxidation of compounds in respiration. How is this energy stored and released as and when it is needed?

Mitochondria and plastids have their own DNA (genetic material). What is known about their fate during nuclear division like mitosis?

What harm can happen if a person sleeps in a closed room with a burning fireplace near him in winter?

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.

Closed circulatory system occurs in:

1. Snail.
2. Cockroach.
3. Cuttle fish.
4. All of these.

In hot summer and cold winter, the number of malaria cases as well as Anopheles declines, reappearance of malaria in humid warm conditions is due to:

1. Surviving malarial parasites in human carriers.
2. Surviving sporozoites in surviving mosquitoes.
3. Monkeys.
4. Mosquito larvae in permanent waters.

Differentiate between primary cell wall and secondary cell wall.