91. Consider the following statements regarding supernumerary chromosomes and choose the correct answer:
1. They are not homologous with any of the normal chromosomes
2. They form synapses among themselves
3. They are generally smaller than normal chromosomes
4. They are found more commonly in plants than in animals
1. They are not homologous with any of the normal chromosomes
2. They form synapses among themselves
3. They are generally smaller than normal chromosomes
4. They are found more commonly in plants than in animals
92. The scientific study of a cell is called
93. When chromatin is in a partly extended state, the diameter of the beads is reduced to about 70A which are called
94. Select the correct statement for nucleolus.
95. According to the Singer-Nicolson fluid mosaic model, the pores may not be stable, but may be constantly appearing and disappearing. This concept is known as
96. The cell walls of plants are made up of fibrils which predominantly contain
97. Consider the following statements and choose the correct answer:
1. Autophagy is the digestion of endogenous material
2. Heterophagy is the intake of exogenous material into the cell and the subsequent breakdown of this material by enzymes
3. Both pinocytosis and phagocytosis require energy
4. The bulk intake of exogenous material is called exocytosis
1. Autophagy is the digestion of endogenous material
2. Heterophagy is the intake of exogenous material into the cell and the subsequent breakdown of this material by enzymes
3. Both pinocytosis and phagocytosis require energy
4. The bulk intake of exogenous material is called exocytosis
98. Which of the following cell organelles is found in a cell which is very active in protein synthesis?
99. Which of the following are fully capable of converting pyruvic acid to carbon dioxide and water?
100. Which one of the following organelles takes part in the formation of acrosome in human sperms?
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