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Q:

Evaporation of water from leaves of a plant is called

A) Transpiration B) Respiration
C) Perspiration D) Evaporation
 
Answer & Explanation Answer: A) Transpiration

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Filed Under: Biology
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Q:

The pH of a solutiion is 3. When its pH changes to 6, then H+ ion concentration

A) increases 2 times B) increases 3 times
C) decreases 1000 times D) decreases 100 times
 
Answer & Explanation Answer: C) decreases 1000 times

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Filed Under: Chemistry
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Q:

If the ___________ firm has zero costs or only has fixed cost, the quantity supplied in equilibrium is given by the point where the marginal revenue is zero.

A) Perfect Competition B) Monopoly
C) Oligopoly D) Monopolistic Competition
 
Answer & Explanation Answer: B) Monopoly

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Filed Under: Indian Economy
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Q:

In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.

One who is honourably discharged from service

A) Belligerent B) Emeritus
C) Truant D) Mercenary
 
Answer & Explanation Answer: B) Emeritus

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Filed Under: English
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Q:

Asexual reproduction differs from sexual reproduction in that in asexual reproduction, ______

A) the new organisms are genetically identical to the parent B) the gametes are produced in reproduction
C) the nuclei of gametes fuse D) the offspring shows variations
 
Answer & Explanation Answer: A) the new organisms are genetically identical to the parent

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Filed Under: Biology
Exam Prep: CAT , Bank Exams , AIEEE

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Q:

______ is a thyroid hormone which controls the balance of calcium in the body.

A) Calcitonin B) Thyroxine
C) Calmodulin D) all of these
 
Answer & Explanation Answer: A) Calcitonin

Explanation:

Calcitonin is 32-amino acid linear polypeptide hormone that is produced in humans primarily by the parafollicular cells of the thyroid, and in many other animals in the ultimopharyngeal body. It acts to reduce blood calcium, opposing the effects of parathyroid hormone.

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Q:

A pair of contrasting characters controlling the same trait is called

A) factors B) loci
C) allele D) lineage
 
Answer & Explanation Answer: C) allele

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Filed Under: Biology
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Q:

Accumulation of which one of the following in the leads to cramp?

A) Lactic acid B) Ethanol
C) Pyruvic acid D) Glucose
 
Answer & Explanation Answer: A) Lactic acid

Explanation:

Muscle cramping is a common problem encountered by athletes and non athletes alike. Defined as painful involuntary skeletal muscle contractions, cramps may be categorized as either non exercise related or exercise related. Traditionally, such cramping was believed to arise from dehydration, electrolyte imbalances (including magnesium, potassium and sodium),accumulation of lactic acid, or low cellular energy levels.

 

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Filed Under: Biology
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