Identify the incorrect statement regarding bacterial ribosomes:
1. They are associated with plasma membrane
2. They are 70 S with two subunits being 30 S and 40 S
3. Several ribosomes may attach to a single mRNA
4. They translate the mRNA into proteins
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Reserve materials in prokaryotic cells are stored in the cytoplasm in the form of:
1. | Non-membrane bound lysosomes | 2. | Gas vacuoles |
3. | Chromatophores | 4. | Inclusion bodies |
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Which of the following is absent in almost all plant cells?
1. | Plastid | 2. | Cell wall |
3. | A large central vacuole | 4. | Centriole |
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The lipid content of the cell membrane mainly consists of:
1. | Phosphoglycerides | 2. | Cholesterol |
3. | Unsaturated fatty acids | 4. | Lipopolysaccharides |
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The approximate percent composition of proteins and lipids in the cell membrane of an erythrocyte is respectively:
1. | 52% and 40% | 2. | 40% and 52% |
3. | 60% and 40% | 4. | 40% and 60% |
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The measure of fluidity of a cell membrane is:
1. | the ability of proteins to flip-flop between the two layers of phospholipids |
2. | the ability of proteins to move laterally within the membrane |
3. | the ability of lipids to flip-flop between the two layers of phospholipids |
4. | the ability of lipids to move laterally within the membrane |
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The endo-membrane system of a eukaryotic cell includes:
1. | Lysosomes | 2. | Peroxisomes |
3. | Mitochondria | 4. | Chloroplasts |
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Which of the following statements would not be applicable to the rough endoplasmic reticulum in a eukaryotic cell?
1. | Frequently observed in cells actively involved in protein synthesis and secretion |
2. | Bear ribosomes on their surface |
3. | Continuous with the outer membrane of the nucleus |
4. | Sites of synthesis of steroidal hormones |
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The number of correct statements regarding Golgi apparatus amongst the given statements will be:
I: | The concave trans surface is the maturing face. |
II: | The cis and trans faces are entirely different but interconnected. |
III: | It remains in close association with the endoplasmic reticulum. |
IV: | Site of formation of glycoproteins and glycolipids. |
1. | 1 | 2. | 2 |
3. | 3 | 4. | 4 |
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Acid hydrolases are found in a single membrane bound organelle called:
1. Glyoxysome | 2. Lysosome |
3. Peroxisome | 4. Ribosome |
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