Which one of the following is the correct description of a certain part of a normal human skeleton:
| 1. | First vertebra is the axis which articulates with the occipital condyles |
| 2. | The 9th and 10th pairs of ribs are called the floating ribs |
| 3. | Glenoid cavity is a depression to which the thigh bone articulates |
| 4. | Parietal bone and the temporal bone of the skull are joined by fibrous joint |
In which one of the following organisms its excretory organs are correctly stated?
| 1. | Earthworm - Pharyngeal, integumentary and septal nephridia |
| 2. | Cockroach - Malpighian tubules and entire caeca |
| 3. | Frog - Kidneys, skin and buccal epithelium |
| 4. | Humans - Kidney, sebaceous glands and fear glands |
Select the correct matching of a hormone, its source and its function:
| Hormone | Source | Function | |
| 1. | Norepineph rine |
Adrenal medulla | Increases heartbeat, rate of respiration and alertness |
| 2. | Glucagon | Beta-cells of Islets of Langerhans |
Stimulates glycogenolysis |
| 3. | Prolactin | Posterior pituitary |
Regulates growth of mammary glands and milk formation in females |
| 4. | Vasopressin | Posterior pituitary |
Increases loss of water through urine |
Given below are four statements (a-d) regarding human blood circulatory system:
| (a) | Arteries are thick-walled and have narrow lumen as compared to veins |
| (b) | Angina is acute chest pain when the blood circulation to the brain is reduced |
| (c) | Persons with blood group AB can donate blood to any person with any blood group under ABO system |
| (d) | Calcium ions play a very important role in blood clotting |
Which two of the above statements are correct?
| 1. | (a) and (b) | 2. | (b) and (c) |
| 3. | (c) and (d) | 4. | (a) and (d) |
Which one of the following statements about the particular entity is true:
| 1. | The gene for producing insulin is present in every body cell |
| 2. | Nucleosome is formed of nucleotides |
| 3. | DNA consists of a core of eight histones |
| 4. | Centromere is found in animals cells, which produces aster during cell division |
Which one of the following pairs of structures is correctly matched with their correct description:
| Structure | Description | |
| 1. | Cartilage and cornea |
No blood supply but do require oxygen for respiratory need |
| 2. | Shoulder joint and elbow joint |
Ball and socket type of joint |
| 3. | Premolars and molars |
20 in all and 3- rooted |
| 4. | Tibia and fibula |
Both form parts of knee joint |
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If for some reason the parietal cells of the gut epithelium become partially non-functional, what is likely to happen:
| 1. | The pH of the stomach will fall abruptly |
| 2. | Steapsin will be more effective |
| 3. | Proteins will not be adequately hydrolysed by pepsin into proteoses and peptones |
| 4. | The pancreatic enzymes, and especially trypsin and lipase, will not work efficiently |
In a human female, the blastocyst:
| 1. | gets implanted into uterus three days after ovulation |
| 2. | gets nutrition from uterine endometrial secretion only after implantation |
| 3. | gets implanted in endometrium by the trophoblast cells |
| 4. | forms placenta even before implantation |
Secretions from which one of the following are rich in fructose, calcium and some enzymes:
1. Liver
2. Pancreas
3. Salivary glands
4. Male accessory glands
When domestic sewage mixes with river water:
| 1. | The increased microbial activity releases micro-nutrients such as iron. |
| 2. | The increased microbial activity uses up dissolved oxygen. |
| 3. | The river water is still suitable for drinking as impurities are only about 0.1%. |
| 4. | Small animals like rats will die after drinking river water. |
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