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 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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Acid hydrolases are found in a single membrane bound organelle called:
1. Glyoxysome | 2. Lysosome |
3. Peroxisome | 4. Ribosome |
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A single membrane, tonoplast, binds the:
1. Inclusion bodies | 2. Polysomes |
3. Vacuoles | 4. Lysosomes |
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Which of the following organelles in a eukaryotic cell can only be seen after staining with vital dye?
1. Mitochondria | 2. Chloroplasts |
3. Nucleus | 4. Endoplasmic reticulum |
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All the following are located in the mitochondrial matrix except:
1. Single circular DNA molecule
2. Proteins of electron transport chain
3. 70 S ribosomes
4. Enzymes of Kreb’s cycle
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