You are required to draw blood from a patient and to keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test tubes. Which of them will you not use for the purpose?
1. Chilled test tube
2. Test tube containing heparin
3. Test tube containing sodium oxalate
4. Test tube containing calcium bicarbonate
The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted into him. It is likely that it will be grafted at the site of:
1. Purkinje system
2. Sinoatrial node
3. Atrioventricular node
4. Atrioventricular bundle
A keystone species is:
| 1. | A common species that has plenty of biomass, yet has a fairly low impact on the community's organisation. |
| 2. | A rare species that has minimal impact on the biomass and on other species in the community. |
| 3. | A dominant species that constitutes a large proportion of the biomass and which affects many other species. |
| 4. | A species that makes up only a small proportion of the total biomass of a community yet has a huge impact on the community's organisation and survival. |
The most thoroughly studied of the known bacteria-plant interactions is the:
| 1. | Gall formation on certain angiosperms by Agrobacterium |
| 2. | Nodulation of Sesbania stems by nitrogen-fixing bacteria |
| 3. | Plant growth stimulation by phosphate– solubilising bacteria |
| 4. | Cyanobacterial symbiosis with some aquatic ferns |
Which one of the following precedes the reformation of the nuclear envelope during the M phase of the cell cycle:
| 1. | Decondensation from chromosomes and reassembly of the nuclear lamina |
| 2. | Formation of the contractile ring and formation of the phragmoplast |
| 3. | Formation of the contractile ring and transcription from chromosomes |
| 4. | Transcription from chromosomes and reassembly of the nuclear lamina |
The richest sources of vitamin are:
1. Chocolate and green gram
2. Rice and hen's egg
3. Carrot and chicken's breast
4. Goat's liver and Spirulina
In transgenics expression of a transgene in the target tissue is determined by:
1. Transgene
2. Promoter
3. Reporter
4. Enhancer
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A normal woman, whose father was colour-blind is married to a normal man. The sons would be:
1. 50% colour-blind
2. All normal
3. All colour-blind
4. 75 % colour-blind
The age of fossils in the past was generally determined by the radio-carbon method and other methods involving radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary periods for different groups of organisms include:
| 1. | Study of the conditions of fossilization |
| 2. | Electron spin resonance (ESR) & fossil DNA |
| 3. | Study of carbohydrates/proteins in rocks |
| 4. | Study of carbohydrates/proteins in fossils |
What kind of evidence suggested that man is more closely related to chimpanzees than to other hominoid apes?
| 1. | Comparison of chromosome morphology only |
| 2. | Evidence from fossil remains and the fossil mitochondrial DNA alone |
| 3. | Evidence from DNA extracted from sex chromosomes, autosomes & mitochondria |
| 4. | Evidence from DNA from sex chromosomes only |
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