PART - 2 - Unit V : CH - 15 Body Fluids and Circulation — BIOLOGY STD 11 Science — Question

Explain non-cylic photophosphorylation in plants. Why is this process called so?

OR

Where does non-cyclic photophosphorylation take place? Describe this process. Why is this process called so?

Lakshita was studying endocrine system for her unit test. She was confused how hormones produce their effects on the target tissue.
She read many times, but still did not understand the process. She asked the same to her neighbour Stuti, a biology teacher in a school. Stuti explained her about the hormone receptor complex through diagrams and flowcharts.

1. Name the two types of receptors.
2. Why do different hormones use different types of receptors?
3. What are second messengers? Give two examples?
4. What values reflect from Lakshita's character?

What would be expected to happen if:

1. GA₃ is applied to rice seedlings
2. dividing cells stop differentiating
3. a rotten fruit gets mixed with unripe fruits
4. you forget to add cytokinin to the culture medium.

Describe the structure of the following with the help of labelled diagrams.
Nucleus

Does pyruvic acid enter the Krebs' cycle directly?

There are 26 bones in the vertebral column of a human adult. Categorise them on the basis of their location and mention the specific number in each of the categories.

Describe the structure of the membrane as proposed in fluid mosaic model.

Compare green algae with red algae.

Calcium plays a very important role in the formation of bones. Write on the role of endocrine glands and hormones responsible for maintaining Calcium homeostasis.

What are the differences beween dicots and monocots?