Q261
Open questionThe string of nucleosomes is coiled into a 300A diameter structure, called
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Cell Biology
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Q262
Open questionWhich of the following is the correct sequence of phases in cell cycle?
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Q263
Open questionConsider the following statements regarding cell cycle and choose the correct answer:
1. During G1 phase the cell grows in size and there is an active synthesis of RNA and proteins
2. The third stage of the cell cycle is termed G2 phase
3. In the mitotic phase, the DNA molecule of each chromosome replicates by the synthesis of a new DNA molecule on the template of the existing DNA
1. During G1 phase the cell grows in size and there is an active synthesis of RNA and proteins
2. The third stage of the cell cycle is termed G2 phase
3. In the mitotic phase, the DNA molecule of each chromosome replicates by the synthesis of a new DNA molecule on the template of the existing DNA
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Q264
Open questionIn a living cell, what is the site of ribosome formation?
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Q265
Open questionThe cisternae on the forming face of the Golgi complex are constantly being formed by fusion of vesicles derived from the
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Q266
Open questionHormone-receptor binding in the cell membrane results in the activation of which of the following enzymes?
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Q267
Open questionThe particles associated with the inner membrane of mitochondria, called elementary particles, consist of
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Q268
Open questionIn many cells the protein released from the endoplasmic reticulum is combined with carbohydrate to produce complex carbohydrates like glycoproteins, mucopoly-saccharides, glycogen and glycolipids. This process is called
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Q269
Open questionWhich of the following is membrane less cell organelle?
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Q270
Open questionStudy the following statements.
1. The term 'Cell' was first coined by Robert Hooke.
2. Plant cells are generally without lysosomes.
3. Cell wall present only in animals cells.
Which of the statement(s) given above is/are true?
1. The term 'Cell' was first coined by Robert Hooke.
2. Plant cells are generally without lysosomes.
3. Cell wall present only in animals cells.
Which of the statement(s) given above is/are true?
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Q271
Open questionMatch List-I with List-II and select the correct answer:
| List-I | List-II |
| a. Photosynthesis | 1. Plasma membrane |
| b. Mineral uptake | 2. Chloroplast |
| c. Respiration | 3. Mitochondria |
| d. Protein synthesis | 4. Ribosomes |
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Q272
Open questionWhich of the following increase the free surface of the cell to enhance absorption?
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Q273
Open questionConsider the following statements regarding the ultrastructure of the nucleolus and choose the correct answer:
1. The matrix or pars amorpha of the nucleolus is heterogeneous
2. The chromatin is Feulgen positive
3. The fibrils, 80 - 100 A in diameter, contain RNA and are probably the precursors of the granules
4. Ribonucleoprotein granules make up the pars granulosa
1. The matrix or pars amorpha of the nucleolus is heterogeneous
2. The chromatin is Feulgen positive
3. The fibrils, 80 - 100 A in diameter, contain RNA and are probably the precursors of the granules
4. Ribonucleoprotein granules make up the pars granulosa
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Q274
Open questionCertain segments of the chromosomes, or the entire chromosomes, are more condensed than the rest of the karyotype during various stages of the cell cycle. Such difference in thickening has been called
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Q275
Open questionWhich of the following is not a function of cytoskeleton in a cell?
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Q276
Open questionUbiquinone or co-enzyme Q can exist in which of the following states of oxidation?
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Q277
Open questionThe primary cell wall, in dicots, contains complex polysaccharides linked to each other and to the cellulose microfibrils by covalent linkages which include
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Q278
Open questionThe part of the pit membrane surrounding the torus is called the
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Q279
Open questionThe movement of cytoplasm within the eucaryotic cells is referred to as
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Q280
Open questionWhich of the following groups are mitochondrial outer membrane enzymes?
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