Biomolecules — BIOLOGY STD 11 Science — Question

What is refered to as satellite chromosome?

Answer briefly: How does bile help in the digestion of fats?

1. Why is mitosis also known as an equational division?
2. You are viewing a dividing cell under a microscope. How can you determine whether it is an animal cell or a plant cell?

Avantika, who works in a publication house suffered from severe back pain, for the last three months. She visited a doctor, who explained that it was due to her wrong sitting posture during the office hours. He also suggested her that she should avoid long working hours continuously.

1. List two disorders that may be caused by wrong sitting posture.
2. Write the vertebral formula of humans.
3. What precautions should be taken to avoid such problem?
4. What value is shown by Avantika?

Give comparison between cyclic and non-cyclic photophosphorylation.

An egg laying mammal is:

1. Kangaroo.
2. Platypus.
3. Koala.
4. Whale.

Draw a labelled diagram showing the posterior view of a muscle, indicating muscle bundles and muscle fibres.

A chordate character is:

1. Spiracles.
2. Postanal tail.
3. Gills.
4. None of these.

Give the names of four classes of fungi. Write the nature of mycelia present in them.

After writing the names of any five false fishes, write there zoological name in front of them.