PART - 1 - Unit III : CH - 8 Cell: The Unit of Life — BIOLOGY STD 11 Science — Question

Discuss the factors responsible for ascent of xylem sap in plants.

What would happen if HCl were not secreted in the stomach?

Sakshi's biology teacher was explaining about the digestion in human beings and the enzymes responsible for digestion. During that time, Sakshi was busy completing work of some other subject. So, she did not understand the topic completely. Sakshi reached home asked her elder sister (a biology graduation student) about the role of HCI in our digestive system as she had heard it in her biology class. She also asked her sister that it was surprising because she had only studied about HCI in chemistry that it is a strong acid to be used in industries and labs, then how is it useful in our body in protein digestion. Her sister clarified her doubts about the difference between the types of HCI used in labs and produced in our body:

1. What is the role of HCI in protein digestion?
2. How the milk protein gets digested in stomach of infants?
3. Name the organ that produces HCI in human body.
4. What value you get from Sakshi's nature as a biology student?

Write notes on the following : (i) Kidney stones (ii) Glomerulonephritis (iii) Kidney failure (iv) Uremia.

Give the schematic representation of an overall view of Krebs’ cycle.

Make a labelled diagram of the sagital section of the human brain and describe the forebrain and midbrain.

Write Short Notes on:

1. Gibberellins.
2. Cytokinins.
3. Ethylene.
4. Abscisic Acid.

Explain sliding filament theory of muscle contraction with neat sketches.

Give a detail explanation of pituitary gland.

Define mitosis. Describe its different phases by drawing them.