Q. No.Keeping in view the fluid mosaic model for the structure of cell membrane, which one of the following statement is correct with respect to movements of lipids and proteins from one lipid monolayer to the other (described as flip flop movement) ?
1. While proteins can flip-flop, lipids cannot
2. Neither lipids nor proteins can flip-flop
3. Both lipids and proteins can flip-flop
4. While lipids can rarely flip-flop, proteins cannot
2. Neither lipids nor proteins can flip-flop
3. Both lipids and proteins can flip-flop
4. While lipids can rarely flip-flop, proteins cannot
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Genes present in the cytoplasm of eukaryotic cells are found in
1. Lysosomes and peroxisomes
2. Mitochondria and inherited via egg cytoplasm
3. Golgi bodies and smooth endoplasmic reticulum
4. Plastids and inherited via male gamete.
Plasmodesmata are
1. Connections between adjacent plant cells
2. Lignified cemented layers between cells
3. Locomotory structures
4. Membranes connecting the nucleus with plasmalemma
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Stroma in the chloroplasts of higher plant contains
1. ChlorophyII
2. Light-independent reaction enzymes
3. Light-dependent reaction enzymes
4. Ribosomes
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Middle lamella is composed mainly of
| 1. | Phosphoglycerides | 2. | Hemicellulose |
| 3. | Muramic acid | 4. | Calcium pectate |
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The plasma membrane consists mainly of
1. Proteins embedded in a phospholipid bilayer
2. Proteins embedded in a polymer of glucose molecules
3. Proteins embedded in a carbohydrate bilayer
4. Phospholipids embedded in a protein bilayer
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Which one of the following structures between two adjacent cells is an effective transport pathway ?
| 1. | Plastoquinones | 2. | Endoplasmic reticulum |
| 3. | Plasmalemma | 4. | Plasmodesmata |
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Important site for formation of glycoproteins and glycolipids is
1. Vacuole
2. Golgi apparatus
3. Plastid
4. Lysosome
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Peptide synthesis inside a cell takes place in
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
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