1. Which of the following is not present in animal cells?
[A] Cell walls
[B] Mitochondria
[C] Ribosomes
[D] Cytoplasm
Show Answer
Correct Answer: A [Cell walls]
Notes:
Animal cells do not have cell walls. Cell walls are found in plant cells. Other given organelles like Mitochondria, Ribosome and Cytoplasm are present in animal cells.
2. In which among the following parts of the Alimentary Canal, the Rennin enzyme is secreted?
[A] Stomach
[B] Mouth
[C] Pancreas
[D] Duodenum
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Correct Answer: A [Stomach]
Notes:
Rennin which is also known as Chymosin, is a proteolytic enzyme related to pepsin that is synthesized by chief cells in the stomach of some animals. Its role in digestion is to curdle or coagulate milk in the stomach.
3. The elements which are found in Haemoglobin, Chlorophyll, Chalcopyrite & Vitamin B12 are respectively as follows__________?
[A] Iron, Copper, Magnesium, Cobalt
[B] Iron, Magnesium, Copper, Cobalt
[C] Iron, Cobalt, Copper, Magnesium
[D] Magnesium, Iron, Cobalt, Copper
Show Answer
Correct Answer: B [Iron, Magnesium, Copper, Cobalt]
Notes:
The elements which are found in Haemoglobin, Chlorophyll, Chalcopyrite & Vitamin B12 are respectively as follows: Iron, Magnesium, Copper, Cobalt.
4. Which among the following is the correct sequence of the Levels of Organisation found in living organsims?
[A] Individual – Organ system – Tissue – Cell – Organ
[B] Organ – Organ system – Tissue – Cell – Individual
[C] Tissue – Cell – Organ – Organ system – Individual
[D] Cell – Tissue – Organ – Organ system – Individual.
Show Answer
Correct Answer: D [Cell – Tissue – Organ – Organ system – Individual.]
Notes:
The correct sequence of the level of Organisation in living organism is :Cell – Tissue – Organ – Organ system – Individual. The cell is basic unit of life and thesmallest level of organisation of the living organisms.In multicellular organisms more than one cell of similar or dissimilar nature combine to form a tissue.Different tissues combone to form distinct organs. A group of organs coordinating to performs a major function forms the organ system.A multicellular individual is formed by the combination of many organ systems working in coordination. Thus Option [D] is correct
5. Which of the following is most inclusive category of classification among others?
[A] Order
[B] Class
[C] Phylum
[D] Family
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Correct Answer: C [ Phylum ]
Notes:
The higher the classification category, the more inclusive it is. Here phylum is highest so is most inclusive.
6. Which of the following type of Kidneys is found in an adult frog?
[A] Pronephric
[B] Metanephric
[C] Mesonephric
[D] None of these
Show Answer
Correct Answer: C [ Mesonephric ]
Notes:
Mesonephros is permanent kidney of frog and most fish, developing posterior to and replacing the pronephros of the embryonic and larval stages. It is a paired organ consisting of a set of nephrons having capsules that filter blood from the glomerulus and tubules whose cells reabsorb water and nutrients and secrete nitrogenous wastes.
7. Guttation takes place due to the development of which of the following?
[A] Cells
[B] Transpiration
[C] Root pressure
[D] All of the above
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Correct Answer: C [Root pressure]
Notes:
Guttation takes place due to the development of root pressure. Guttation is the exudation of drops of xylem sap on the tips or edges of leaves of some vascular plants, such as grasses and a number of fungi.
8. Which of the following can be checked by doctors with the help of Pulse reading? (UPSC Prelims 1979).
[A] Temperature
[B] Heart beat
[C] Blood pressure
[D] Respiration rate
Show Answer
Correct Answer: B [Heart beat]
Notes:
Pulse rate is the number of heart beats per minute. The resting pulse rate for an average adult is between 60 and 80 beats per minute. It can go up to 130–150 beats per minute when you’re exercising because the body needs more oxygen. The study of the pulse is known as sphygmology.
9. Which of the following Vitamin is responsible for anti-sterile activities? (UPSC Prelims 1979).
[A] Vitamin A
[B] Vitamin B
[C] Vitamin E
[D] Vitamin D
Show Answer
Correct Answer: C [Vitamin E]
Notes:Vitamin E is known as anti-sterility vitamin or fertility vitamin. It is chemically called as tocopherol. Vitamin E deficiency occurs rarely in adults. Much like vitamin C, vitamin E is another powerful anti-oxidant. Vitamin E is used during testosterone synthesis. Sperm production or spermatogenesis requires vitamin E as well as zinc. Following symptoms have been associated with vitamin E deficiency in humans:
- Muscular weakness & dystrophy, nocturnal muscle cramps
- Neurological disorders
- Degeneration of liver (hepatic necrosis)
- Shortened life-span of RBCs
10. Which of the following clearly define Lichens? (UPSC Prelims 1984)
[A] Algae and fungi
[B] Algae and virus
[C] Fungi and virus
[D] Virus and bacteria
Show Answer
Correct Answer: A [Algae and fungi]
Notes:
Lichen is not a single organism. Rather, it is a symbiosis between different organisms – a fungus and an alga or cyanobacterium. Cyanobacteria are sometimes still referred to as blue-green algae.
