Which one of the following hormones reduces blood pressure?
1. Antidiuretic hormone
2. Atrial Natriuretic factor
3. Aldosterone
4. Angiotensin-II
Endemism refers to:
1. Species richness
2. Species evenness
3. Species confined to that region
4. Species diversity
In a cell, the separation of DNA strands is brought about by the enzyme DNA helicase, whereas in PCR, the separation of DNA strands is due to:
| 1. | High temperature | 2. | Two sets of Primers |
| 3. | Taq DNA polymerase | 4. | Deoxynucleotides |
A low frequency recombination indicates that the genes are:
1. Located far apart from each other
2. Located close to each other
3. Not linked
4. Present on different chromosomes
How many Y-chromosomes are present in the 2nd polar body in human beings?
| 1. | 01 | 2. | 00 |
| 3. | 23 | 4. | 02 |
A population with finite resources shows a logistic growth curve where the correct sequence of events will be:
| 1. | Stationary phase → Acceleration phase → Lag phase → Asymptote |
| 2. | Acceleration phase → Deceleration → Asymptote |
| 3. | Acceleration phase → Leg phase → Stationary phase |
| 4. | Lag phase → Acceleration phase → Deceleration → Asymptote |
Which of the following hormones are secreted in women only during pregnancy?
| (a) | Relaxin | (b) | Oxytocin |
| (c) | hCG | (d) | hPL |
| (e) | Progesterone |
Choose the most appropriate answer from the options given below:
| 1. | (c), (d) and (e) only | 2. | (b) and (e) only |
| 3. | (b), (c) and (d) only | 4. | (a), (c) and (d) only |
In the regulation of respiration, a chemosensitive area adjacent to the rhythm centre in the medulla region of the brain, is highly sensitive to:
1. \(HCO^-_3\)
2. \(CO_2\)
3. \(O_2\)
4. \(N_2\)
[as one ascends from species to higher categories]?
| 1. | Family | 2. | Genus |
| 3. | Class | 4. | Phylum |
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