Which one out of A-D given below correctly represents the structural formula of the basic amino acid?
| A | B |
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| C | D |
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| 1. | C | 2. | D |
| 3. | A | 4. | B |
What is correct to say about the hormone action in humans?
| 1. | Glucagon is secreted by β-cells of the islet of Langerhans and stimulates glycogenolysis |
| 2. | Secretion of thymosin is stimulates with ageing |
| 3. | In females, FSH first binds with specific receptors on ovarian cell membrane |
| 4. | FSH stimulates the secretion of oestrogen and progesterone |
Which one of the following is the correct statement for respiration in humans?
| 1. | Cigarette smoking may lead to inflammation of the bronchi |
| 2. | Neural signals from the pneumotaxic centre in the pons region of the brain can increase the duration of inspiration |
| 3. | Workers in grinding and stone-breaking industries may suffer from lung fibrosis |
| 4. | About 90% of carbon dioxide (CO2) is carried by haemoglobin as carbaminohaemoglobin |
Removal of introns and joining of exons in a defined order during transcription is called:
1. Looping
2. Inducing
3. Slicing
4. Splicing
F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1: 2: 1. It represents a case of:
1. Co-dominance
2. Dihybrid crosses
3. Monohybrid crosses with complete dominance
4. Monohybrid crosses with incomplete dominance
Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage?
| 1. | Prophase-I during meiosis |
| 2. | Prophase-II during meiosis |
| 3. | Prophase of mitosis |
| 4. | Both prophase and metaphase of mitosis |
People who have migrated from the planes to an area adjoining Rohtang Pass about six months back:
| 1. | Have more RBCs and their haemoglobin has a lower binding affinity to 02 |
| 2. | Are not physically fit to play games like football |
| 3. | Suffer from altitude sickness with symptoms like nausea, fatigue, etc. |
| 4. | have the usual RBC count but their haemoglobin has a very binding affinity to 02 |
For transformation, microparticles coated with DNA to be bombarded with gene gun are made up of:
1. Silver or platinum
2. Platinum or zinc
3. Silicon or platinum
4. Gold or tungsten
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