21. When cells are ground or homogenized, the cell membranes break up into fragments, which round off to form bodies called
22. Match List I (Chromosome models) with List II (Discoverers) and choose the correct answer:
List-I
List-II
a. Simple multi-stranded model
1. DuPraw
b. Centipede model
2. Nebel
c. Coiled coil model
3. Steffensen
d. Folded fibre model
4. Taylor
| List-I | List-II |
| a. Simple multi-stranded model | 1. DuPraw |
| b. Centipede model | 2. Nebel |
| c. Coiled coil model | 3. Steffensen |
| d. Folded fibre model | 4. Taylor |
23. Consider the following statements regarding cell inclusions and choose the correct answer:
1. Starch grains occur in plant cells only, particularly in storage organs such as rhizomes and tubers
2. Aleurone grains contain stored proteins in plant cells
3. Crystals of various chemical compounds occur in plant cells
1. Starch grains occur in plant cells only, particularly in storage organs such as rhizomes and tubers
2. Aleurone grains contain stored proteins in plant cells
3. Crystals of various chemical compounds occur in plant cells
24. The synaptonemal complexes mostly disappear during
25. What is a tonoplast?
26. Which of the following, when blocks protein synthesis after mixing light and heavy ribsomes, no hybrids are formed?
27. The chromosomes move towards the equator of the spindle in which of the following phases?
28. The term 'Meiosis' was coined by
29. In plant cells, the turgidity and rigidity is provided by
30. Identify the cell that is amoeboid in shape.
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