Q. No.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.
Chromatin is made up of:
| 1. | DNA and protein |
| 2. | DNA and histone |
| 3. | DNA, RNA, protein |
| 4. | RNA, histone and oil bodies. |
Which one of the following is correct for the transmembrane proteins in lipid bilayer of plasma membrane?
| 1. | They are absent in animal cells. |
| 2. | They act as channel proteins. |
| 3. | They are absent in plant cells. |
| 4. | They are only externally located |
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. |
Mitochondria and chloroplast are believed to be bacterial endosymbiont because
| I: | they have self nucleic acid i.e., circular ds, DNA and RNAs |
| II: | 70s ribosomes |
| III: | their membrane resembles that of bacteria |
| IV: | ETS and ATP forming machinery is present. |
2. I, II and III
3. All of these
4. I and IV
If a biochemical analysis of mitochondria has to be done, the best procedure would be
| 1. | select cells which have a larger number of mitochondria |
| 2. | plasmolyse the cell and filter out the mixture and take the debris |
| 3. | grind the cells and filter out the mixture and take the debris |
| 4. | subject the cell to cell fractionation (centrifuge) and obtain mitochondria |
Which one of the following structure is an organelle within an organelle?
1. Ribosome
2. Peroxysome
3. ER
4. Mesosome
SER and RER can be distinguished with its presence in
| 1. | protein synthesising cells |
| 2. | protein and fat synthesising cells |
| 3. | carbohydrates and fat synthesising cells |
| 4. | lipid and protein synthesising cells |
Fluid mosaic model of plasma membrane was given by
1. Robertson
2. Robert Hooke
3. Singer and Nicholson
4. Gorter and Grendel
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