Q. No.Which one of the following structures between two adjacent cells is an effective transport pathway ?
1.
Plastoquinones
2.
Endoplasmic reticulum
3.
Plasmalemma
4.
Plasmodesmata
Important site for formation of glycoproteins and glycolipids is
1. Vacuole
2. Golgi apparatus
3. Plastid
4. Lysosome
Peptide synthesis inside a cell takes place in
1. Chloroplast
2. Mitochondria
3. Chromoplast
4. Ribosomes
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 |
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 |
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 |
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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