Q. No.Free radicals in our body have been implicated in
1. ageing
2. certain degenerative disorders
3. neurodegeneration
4. all the above
If a chloroplast of plant is isolated and studied in a test tube the investigation is described
as
1. in vivo
2. in vitro
3. in situ
4. none of these.
Primary cell wall consists of a loose network of cellulose microfibrils impregnated with a matrix of
| 1. | glycoprotein and flavoprotein |
| 2. | hemicellulose and flavoprotein |
| 3. | hemicellulose and pectin |
| 4. | flavoprotein and pectin. |
If there were present no subcellular organelles in a eukaroytic cell, the rate of
metabolism will
1. increase
2. decrease
3. not change
4. increase dramatically.
Which is not true for prokaryotic cells ?
| 1. | They are smaller than eukaryotic cells. |
| 2. | They lack membrane-bound organelles. |
| 3. | Their genetic material is localised within nucleoid. |
| 4. | They contain a well developed cytoskeleton. |
Golgi body is associated with
| 1. | packaging and storage of material |
| 2. | cell wall formation |
| 3. | transport of enzyme |
| 4. | all of the above |
Which of the following cytoskelelal components of an eukaryotic cell play a major role in
protoplasmic streaming?
1. Microtubules
2. microfilaments
3. Intermediate filaments
4. None of these
Extranuclear genes occurs in
| 1. | plastids and are not inherited |
| 2. | plasmid and are not inherited |
| 3. | mitochondria and are inherited by female |
| 4. | mitochondria and are inherited by male. |
Which of the following is not a true subcellular organelle ?
1. Peroxisome
2. Ribosome
3. Chloroplast
4. Lysosome.
An organelle present in all plant cells but absent from those of animals is
1. Mitochondria
2. peroxisome
3. glyoxysomes
4. Centrioles
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