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प्रश्न
What is a chromosome?
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उत्तर
During cell division, the long and fibrous hereditary material, chromatin gets converted into a short, thick, and ribbon-like structure called a chromosome.
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संबंधित प्रश्न
Who discovered cells and how?
Name the part of the cell concerned with the following :
Transmission of hereditary characters from parents to offspring
What is the name of the chemical substance which constitutes the genes?
Try to find the names of four cell organells hidden in this maze, (hint: The hidden words can appear horizontally or vertically; forwards or backward or even mixed up). Write them in the lines provided. For example : “NUCLEUS” in the last row, seven backward letters.
| A | J | F | B | H | E | M | O | E | L | O | U | C | A | V |
| H | V | L | E | U | C | O | P | L | A | S | T | N | O | E |
| C | H | R | O | M | O | P | L | A | S | T | X | T | E | R |
| S | U | E | L | C | U | N | W | P | L | A | S | T | I | D |
Write a short answer.
Why is a cell called the structural unit of a living organism?
What was the contribution of the following to our knowledge of cells?
Robert Hooke
Fill in the blank with a suitable word:
DNA is an abbreviated form of ______.
Match the items in column A with the appropriate items in column B:
| column A | column B |
| 1. Platform or workplace for the synthesis of proteins | a. Golgi complex |
| 2. A powerhouse of cells | b. Ribosomes |
| 3. Help in the formation of cell plate during cell division | c. Chloroplast |
| 4. Site for photosynthesis | d. Mitochondria |
| 5. Control tower of cell | e. Chromosomes |
| 6. A structure bearing genes | f. Nucleus |
Who studied the cell first?
What is difference between us?
Prokaryotic cell and eukaryotic cell.
