1. Least generative power is a feature of which among the following cells of Human Body?
[A] Brain
[B] Bones
[C] Skin
[D] Liver
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Correct Answer: A [Brain]
Notes:
The human brain is the central organ of the human nervous system, and with the spinal cord makes up the central nervous system. It is considered to have the Least generative power.
2. How many pairs of ribs are there in a human body?
[A] 10 pairs
[B] 12 pairs
[C] 14 pairs
[D] 16 pairs
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Correct Answer: B [12 pairs]
Notes:
There are total 24 ribs (12 pairs), out of which 14 (7 pairs) are true ribs
3. 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.
4. Which among the following is not a monosaccharide?
[A] Glucose
[B] Sucrose
[C] Fructose
[D] Galactose
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Correct Answer: B [Sucrose]
Notes:
Monosaccharides are simple carbohydrates molecules that cannot be broken down into smaller molecules of other carbohydrates. Glucose and fructose are examples of Monosaccharides.
5. Which among the following function as locus of biochemical reactions?
[A] Cell plasma
[B] Cell membrane
[C] Cell walls
[D] None of the above
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Correct Answer: B [Cell membrane]
Notes:
The cells membranes hold enzymes of sequential reactions in close proximity
6. A plant belonging to which of the following groups would show least adaptation to marine water?
[A] Pteridophytes
[B] Gymnosperms
[C] Angiosperms
[D] Bryophytes
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Correct Answer: C [Angiosperms]
Notes:
A plant belonging to angiosperms group would show least adaptation to marine water. Angiosperms are vascular plants that have stems, roots, and leaves.
7. Pest-resistant cotton commonly known as ‘Bt-Cotton’ is genetically engineered by inserting a gene from a:
[A] Bacterium
[B] Virus
[C] Microalgae
[D] Protist
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Correct Answer: A [Bacterium]
Notes:
Bt cotton is an insect-resistant transgenic crop designed to combat the bullworm. Bt is a soil bacterium containing Cry genes that encode crystal proteins which are fatal to some Lepidopteran caterpillars when ingested.
8. Golden rice is a variety of rice produced through genetic engineering to biosynthesize beta-carotene. This genetically engineered (GE) rice variety, can help to alleviate deficiency of _?
[A] Vitamin A
[B] Vitamin B
[C] Vitamin C
[D] Vitamin D
Show Answer
Correct Answer: A [Vitamin A]
Notes:
Golden Rice is a genetically engineered (GE) rice variety that has been developed by the biotech industry to produce pro-vitamin A. Vitamin A deficiency can be caused by infections that reduce appetite or the body’s ability to absorb vitamin A or may cause night blindness. Golden Rice has the potential to complement existing efforts that seek to reduce blindness and other VAD induced diseases.
9. 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.
10. Synapse gap is present between which of the following?
[A] Brain and Spinal cord
[B] Two eyes
[C] Two Kidneys
[D] Two neurons
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Correct Answer: D [Two neurons]
Notes:
Information from one neuron flows to another neuron across a synapse. The synapse contains a small gap separating neurons. The synapse consists of: a presynaptic ending that contains neurotransmitters, mitochondria and other cell organelles.
