1. Digestion is not a function of which of the following ?
[A] Biotin
[B] Pepsin
[C] Renin
[D] None of the above
Show Answer
Correct Answer: A [Biotin]
Notes:
Biotin also called vitamin H, vitamin B₇ or vitamin B₈ is a water-soluble B vitamin. It is also known as vitamin H. Biotin is not a used in the Digestion of food.
2. Which among the below is not a food plant?
[A] Allium cepa
[B] Allium sativum
[C] Asparagus officinalis
[D] Atropa belladona
Show Answer
Correct Answer: D [Atropa belladona]
Notes:
Atropa belladonna, commonly known as belladonna or deadly nightshade, is a poisonous perennial herbaceous plant in the nightshade family Solanaceae. Allium cepa, Allium sativum and Asparagus officinalis are food plants.
3. From which part, Coconut coir is obtained?
[A] Epicarp
[B] Mesocarp
[C] Endocarp
[D] Seed
Show Answer
Correct Answer: B [Mesocarp]
Notes:
Coir is the nature fibre obtained from mescocarp of the coconut fruit. Coconut fruit has three layers viz. Exocarp, MesoCarp and Endocarp. Exocarp is the outer green layer, Mesocarp is the fleshy, which becomes husk on drying middle layer and endocarp is the inner woody layer.
4. Which among the following correctly refers to Ischemia?
[A] restriction in blood supply due to factors in the blood vessels
[B] Abrupt fall in the blood Pressure
[C] necrosis in a blood vessel due to a local lack of oxygen
[D] condition of severely deficient supply of oxygen to the body
Show Answer
Correct Answer: A [restriction in blood supply due to factors in the blood vessels]
Notes:
Restriction in blood supply due to factors in the blood vessels refers to Ischemia. Ischemia can have causes that aren’t due to underlying disease some of which include extreme exercise, cold exposure or tourniquet.
5. From the point of view of evolution of living organisms, which of the following set of animals is a correct sequence of evolution?
[A] Whale, Kangaroo, Echidna
[B] Echidna, Whale, Kangaroo
[C] Kangaroo, Whale, Echidna
[D] Echidna, Kangaroo, Whale
Show Answer
Correct Answer: D [Echidna, Kangaroo, Whale]
Notes:
From the point of view of evolution of living organisms, the correct sequence of evolution in the above options is: Echidna, Kangaroo, Whale.
6. In human body, the main target of antidiuretic hormone is ?
[A] Heart
[B] Kidney
[C] Liver
[D] Spleen
Show Answer
Correct Answer: B [ Kidney]
Notes:
The target of antidiuretic hormone is the collecting duct of the nephron. If ADH is released, less urine is excreted.
7. In human body, the largest amount of the carbon dioxide produced by body cells is carried to the lungs as__:
[A] CO2 attached to haemoglobin in the red blood cells
[B] The bicarbonate ion attached to haemoglobin
[C] CO2 gas in solution in the plasma
[D] Bicarbonate ion dissolved in the plasma
Show Answer
Correct Answer: D [ Bicarbonate ion dissolved in the plasma]
Notes:
Although a small amount of CO2 is carried by the red blood cells, most is carried as the bicarbonate ion in plasma. Carbon dioxide can travel in the bloodstream in many forms. It can mix with water and form carbonic acid. It can also attach to hemoglobin in red blood cells.
8. Which solution makes a cell turgid?
[A] Hypotonic solution
[B] Isotonic solution
[C] Hypertonic solution
[D] None of the above
Show Answer
Correct Answer: A [Hypotonic solution]
Notes:
When the plant cell is placed in a hypotonic solution, it takes up water by osmosis and starts to swell, but the cell wall prevents it from bursting. The plant cell is said to have become “turgid” i.e. swollen and hard.
9. In which of the following kidney shaped guard cells are present?
[A] Dicot plants
[B] Monocot plants
[C] Grasses
[D] Algae
Show Answer
Correct Answer: A [Dicot plants]
Notes:
Kidney-shaped guard cells are found in dicotyledons. A dicotyledon is a flowering plant with an embroy that bears two cotyledons (seed leaves).
10. Dehydration in human body is caused due to the deficiency of which of the following?
[A] Water
[B] Hormones
[C] Vitamin
[D] Salt
Show Answer
Correct Answer: A [Water]
Notes:
Dehydration is a deficiency of water in thebody. Vomiting, diarrhea, excessive sweating, burns, kidney failure, and use of diuretics maycause dehydration. People feel thirsty, and asdehydration worsens, they may sweat less and excrete less urine.
