Advertisements
Advertisements
Question
What is a chromosome?
Advertisements
Solution
During cell division, the long and fibrous hereditary material, chromatin gets converted into a short, thick, and ribbon-like structure called a chromosome.
APPEARS IN
RELATED QUESTIONS
Carry out the following osmosis experiment:
Take four peeled potato halves and scoop each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now,
- Keep cup A empty
- Put one teaspoon of sugar in cup B
- Put one teaspoon salt in cup C
- Put one teaspoon sugar in the boiled potato cup D.
Keep these for two hours. Then, observe the four potato cups and answer the following:
- Explain why water gathers in the hollowed portion of B and C.
- Why is potato A necessary for this experiment?
- Explain why water does not gather in the hollowed-out portions of A and D.
What is the name of the chemical substance which constitutes the genes?
Name the scientist who invented the first microscope.
Match the name of the organelle given in Column A with its function given in Column B.
| Column A (Organelle) | Column B (Function) | ||
| 1 | leucoplast | a | help in cell division |
| 2 | nucleus | b | transport of material |
| 3 | ribosomes | c | making food |
| 4 | mitochondria | d | digesting foreign bodies |
| 5 | endoplasmic reticulum | e | storage of starch and proteins |
| 6 | golgi bodies | f | making the cell turgid |
| 7 | chloroplast | g | making proteins |
| 8 | centrosome | h | controlling all the vital activities of a cell |
| 9 | vacuole | i | releasing energy |
| 10 | lysosomes | j | synthesis of cell wall in a plant cell |
Who proposed the Cell theory? Explain the main points of this theory.
Name any five cell organelles.
What was the contribution of the following to our knowledge of cells?
Robert Hooke
What is the function of the following?
Cell membrane
When will you use a simple microscope and when, a compound microscope? Explain in detail how you will use them.
The Term “ cell” was coined by ______
