Which of the following functions is not performed by secretions from salivary glands?
| 1. | Digestion of disaccharides |
| 2. | Control bacterial population in mouth |
| 3. | Digestion of complex carbohydrates |
| 4. | Lubrication of oral cavity |
 53%
Level 3: 35%-60%
Hints
Select the incorrect statement with reference to mitosis:
| 1. | Splitting of centromere occurs at anaphase. |
| 2. | All the chromosomes lie at the equator at metaphase. |
| 3. | Spindle fibres attach to centromere of chromosomes. |
| 4. | Chromosomes decondense at telophase |
Subtopic: Â Cell Division: Mitosis (Karyokinesis) |
 67%
Level 2: 60%+
Hints
If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness
| 1. | 100% | 2. | 25% |
| 3. | 50% | 4. | 75% |
Subtopic: Â Pedigree Analysis: Problem Solving |
 69%
Level 2: 60%+
Hints
Ten E.coli cells with \({ }^{15} \mathrm{~N}\) - ds DNA are incubated in medium containing nucleotides. After 60 minutes, how many E.coli cells will have DNA totally free from \({ }^{15} \mathrm{~N}\) ?
| 1. | 80 cells | 2. | 20 cells |
| 3. | 40 cells | 4. | 60 cells |
Subtopic: Â Transcription |
 63%
Level 2: 60%+
Hints
Which of the following are not the effects of Parathyroid hormone?
Choose the most appropriate answer from the options given below:
| (a) | Stimulates the process of bone resorption |
| (b) | Decreases Ca2+ level in blood |
| (c) | Reabsorption of Ca2+ by renal tubules |
| (d) | Decreases the absorption of Ca2+ from digested food |
| (e) | Increases metabolism of carbohydrates |
Choose the most appropriate answer from the options given below:
| 1. | (b) and (c) only | 2. | (a) and (c) only |
| 3. | (b), (d) and (e) only | 4. | (a) and (e) only |
Subtopic: Â Parathyroid |
 66%
Level 2: 60%+
Hints
Which one of the following statements is correct?
| 1. | Increased ventricular pressure causes closing of the semilunar valves. |
| 2. | The atrio-ventricular node (AVN) generates an action potential to stimulate atrial contraction. |
| 3. | The tricuspid and the bicuspid valves open due to the pressure exerted by the simultaneous contraction of the atria |
| 4. | Blood moves freely from atrium to the ventricle during joint diastole |
Subtopic: Â Human Heart: Cardiac Cycle |
 56%
Level 3: 35%-60%
Hints
Which of the following is a correct statement?
| 1. | Mycoplasma have DNA, Ribosome and cell wall. |
| 2. | Cyanobacteria are a group of autotrophic organisms classified under Kingdom Monera. |
| 3. | Bacteria are exclusively heterotrophic organisms. |
| 4. | Slime moulds are saprophytic organisms classified under Kingdom Monera. |
Subtopic: Â Kingdom Monera: Introduction |Â Kingdom Protista: Slime Moulds |
 72%
Level 2: 60%+
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