Q. No.Peptide synthesis inside a cell takes place in
1. Chloroplast
2. Mitochondria
3. Chromoplast
4. Ribosomes
1. Chloroplast
2. Mitochondria
3. Chromoplast
4. Ribosomes
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Which one of the following organisms is not an example of eukaryotic cells ?
1. Paramecium caudatum
2. Escherichia coli
3. Euglena viridis
4. Amoeba proteus
In eubacteria, a cellular component that resembles eukaryotic cells is
| 1. | Plasma membrane | 2. | Nucleus |
| 3. | Ribosomes | 4. | Cell wall |
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What is true about ribosomes ?
1. The prokaryotic ribosomes are 80S, where "S" stands for sedimentation coefficient
2. These are composed of ribonucleic acid and proteins
3. These are found only in eukaryotic cells
4. These are self-splicing introns of some RNAs
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Select the correct statement from the following regarding cell membrane:
1. Na+ and K+ ions move across cell membrane by passive transport
2. Proteins make up 60% to 70% of the cell membrane
3. Lipids are arranged in a bilayer with polar heads towards the inner part
4. Fluid mosaic model of cell membrane was proposed by Singer and Nicolson
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Which one of the following structure is an organelle within an organelle ?
1. Ribosome
2. Peroxisome
3. ER
4. Mesosome
Which one of the following cellular parts is correctly described ?
1. Thylakoids - flattened membranous sacs forming the grana of chloroplasts
2. Centrioles - sites for active RNA synthesis
3. Ribosomes - those on chloroplasts are larger (80s) while those in the cytoplasm are smaller (70s)
4. Lysosomes - optimally active at a pH of about 8.5
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Which one of the following organelle in the figure correctly matches with its function?
1. Golgi apparatus, protein synthesis
2. Golgi apparatus, formation of glycolipids
3. Rough endoplasmic reticulum, protein synthesis
4. Rough endoplasmic reticulum, formation of glycoproteins
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