Q. No.The main arena of various types of activities of a cell is
1. plasma membrane
2. mitochondrion
3. cytoplasm
4. nucleus
The plasma membrane consists mainly of
| 1. | phospholipids embedded in a protein bilayer |
| 2. | proteins embedded in a phospholipid bilayer |
| 3. | proteins embedded in a polymer of glucose molecules |
| 4. | proteins embedded in a carbohydrate bilayer |
Middle lamella is mainly composed of
1. hemicellulose
2. muramic acid
3. calcium pectate
4. phosphoglycerides
Cytoskeleton is made up of
| 1. | calcium carbonate granules |
| 2. | callose deposits |
| 3. | cellulosic microfibrils |
| 4. | proteinaceous filaments |
Polysome is formed by
| 1. | several ribosomes attached to a single mRNA |
| 2. | many ribosomes attached to a strand of endoplasmic reticulum |
| 3. | a ribosome with several subunits |
| 4. | ribosomes attached to each other in a linear arrangement |
Vacuole in a plant cell:
| 1. | is membrane-bound and contains storage proteins and lipids
|
| 2. | is membrane-bound and contains water and excretory substances
|
| 3. | lacks membrane and contains air
|
| 4. | lacks membrane and contains water and excretory substances |
Which one of the following is not a constituent of cell membrane ?
1. Cholesterol
2. Glycolipids
3. Proline
4. Phospholipids
Select the wrong statement from the following:
| 1. | both chloroplasts and mitochondria contain an inner and an outer membrane |
| 2. | both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by the thylakoid membrane |
| 3. | both chloroplasts and mitochondria contain DNA |
| 4. | the chloroplasts are generally much larger than mitochondria |
The organelle common among prokaryotic and eukaryotic cell is
1. centrosome
2. ribosome
3. peroxisome
4. glyoxysome
A chromosome carrying the centromere at one of the ends is called
1. acentric
2. submetacentric
3. telocentric
4. metacentric.
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