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.
Cell theory was proposed by
1. a botanist
2. a zoologist
3. a botanist and a zoologist
4. a psychologist.
Which of the following organelles contain DNA?
(i) | Mitochondria |
(ii) | Chloroplasts |
(iii) | Golgi bodies |
(iv) | Ribosomes |
1. (i) and (ii)
2. (ii) and (iii)
3. (i) only
4. (iv) only.
Identify the accurate explanation of mesosome.
It is :
1. | a specialised structure of prokaryotic cell formed by extension of plasma membrane into the cytoplasm |
2. | the middle layer of the prokaryotic cell wall |
3. | the organelle of eukaryotic cell which helps in lipid synthesis |
4. | the middle layer of eukaryotic cell wall. |