Identify A, B and C in the diagrammatic representation of the mechanism of hormone action.
Select the correct option from the following:
| 1. | A = Steroid Hormone; B = Hormone receptor Complex; C = Protein |
| 2. | A = Protein Hormone; B = Receptor; C = Cyclic AMP |
| 3. | A = Steroid Hormone; B = Receptor; C = Second Messenger |
| 4. | A = Protein Hormone; B = Cyclic AMP; C = Hormone-receptor Complex |
Which of the following are correctly matched with respect to their taxonomic classification?
| 1. | Centipede, millipede, spider, scorpion-Insecta |
| 2. | House fly, butterfly, tsetse fly, silverfish-Insecta |
| 3. | Spiny anteater, sea urchin, sea cucumber- Echinodermata |
| 4. | Flying fish, cuttlefish, silverfish- Pisces |
Coca alkaloid or cocaine is obtained from:
| 1. | Papaver somniferum | 2. | Atropa belladonna |
| 3. | Erythroxylum coca | 4. | Datura |
Which one of the following statements is wrong?
| 1. | Algae increase the level of dissolved oxygen in the immediate environment |
| 2. | Algin is obtained from red algae and carrageenan from brown algae |
| 3. | Agar-agar is obtained from Gelidium and Gracilaria |
| 4. | Laminaria and Sargassum are used as food |
Match the following enzymes with their functions:
|
Column-I |
Column-II |
||
|
(a) |
Restriction endonuclease |
(i) |
joins the DNA fragments |
|
(b) |
Exonuclease |
(ii) |
extends primers on genomic DNA template |
|
(c) |
DNA ligase |
(iii) |
cuts DNA at a specific position |
|
(d) |
Tag polymerase |
(iv) |
removes nucleotides from the ends of DNA |
Select the correct option from the following:
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iii) | (i) | (iv) | (ii) |
| 2. | (iii) | (iv) | (i) | (ii) |
| 3. | (iv) | (iii) | (i) | (ii) |
| 4. | (ii) | (iv) | (i) | (iii) |
Given below are four statements pertaining to the separation of DNA fragments using gel electrophoresis. Identify the incorrect statements:
| (a) | DNA is a negatively charged molecule and so it is loaded on gel towards the anode terminal. |
| (b) | DNA fragments travel along the surface of the gel, whose concentration does not affect the movement of DNA. |
| (c) | The smaller the DNA fragment, the greater the distance it travels through it. |
| (d) | Pure DNA can be visualized directly by exposing it to UV radiation. |
Choose the correct answer from the options given below:
| 1. | (a), (c) and (d) | 2. | (a), (b) and (c) |
| 3. | (b), (c) and (d) | 4. | (a), (b) and (d) |
Which of the following diseases is an auto-immune disorder?
| 1. | Myasthenia gravis | 2. | Arthritis |
| 3. | Osteoporosis | 4. | Gout |
Which of the following is a correct statement?
| 1. | IUDs once inserted need not be replaced. |
| 2. | IUDs are generally inserted by the user herself. |
| 3. | IUDs increase phagocytosis of sperms in the uterus. |
| 4. | IUDs suppress gametogenesis. |
The two antibiotic resistance genes on vector pBR 322 are for:
1. Ampicillin and Tetracycline
2. Ampicillin and Chloramphenicol
3. Chloramphenicol and Tetracycline
4. Tetracycline and Kanamycin
In Australia, marsupials and placental mammals have evolved to share many similar characteristics. This type of evolution may be referred to as:
| 1. | Adaptive Radiation | 2. | Divergent Evolution |
| 3. | Cyclical Evolution | 4. | Convergent Evolution |
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