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Q:

Speed of sound is maximum in which among the following?

A) Gases B) Vaccum
C) Liquids D) Solids
 
Answer & Explanation Answer: D) Solids

Explanation:

We know that, in solids all the particles are packed together and hence sound can travel from one to one very fast.

 

Hence, speed of sound is maximum in solids and decreses from solids to liquids and liquids to gases. Sound can't travel through vaccum.

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Filed Under: Physics
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Q:

Where does digestion of protein begin?

A) Mouth B) Pharynx
C) Stomach D) Liver
 
Answer & Explanation Answer: C) Stomach

Explanation:

Three main enzymes, pepsin secreted by the stomach and trypsin and chymotrypsin secreted by the pancreas, break down food proteins into polypeptides that are then broken down by various exopeptidases and dipeptidases into amino acids.

 

Hence, digestion of protein begin in stomach.

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Filed Under: Biology
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Q:

Where is excess glucose stored?

A) Blood B) Liver
C) Heart D) Kidneys
 
Answer & Explanation Answer: B) Liver

Explanation:

Glucose is essential for energy in all the living organisms. When we have more glucose than needs in our bloodstream, then the excess glucose is stored as large compounds as Glycogen. This glycogen fills the cells of the liver and available for any quick shots of energy.

 

Hence, Liver is called as warehouse for the excess glucose.

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Filed Under: Biology
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Q:

Find the odd man out of the series?

128, 32, 14, 2.66, 0.88

A) 32 B) 14
C) 2.66 D) 0.88
 
Answer & Explanation Answer: B) 14

Explanation:

Here the given series is 128, 32, 14, 2.66, 0.88

 

128 / 4 = 32

32 / 3 = 10.666

10.666 / 4 = 2.666

2.666 / 3 = 0.888

 

Hence, the odd man in the given number series is 14.

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Q:

Find the next number in the given sequence?

11, 17, 39, 85, ?

A) 133 B) 143
C) 153 D) 163
 
Answer & Explanation Answer: D) 163

Explanation:

Her the given number series is 11, 17, 39, 85, ?

 

 

1111 + 32 - 3 = 1717 + (52 - 3) = 3939 + (72 - 3) = 8585 + (92 - 3) = 163

 

Hence, the next number in the given sequence is 163.

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Filed Under: Number Series
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Q:

A card is drawn from a pack of 52 cards. What is the probability that either card is black or a king? 

A) 15/52 B) 17/26
C) 13/17 D) 15/26
 
Answer & Explanation Answer: D) 15/26

Explanation:

Number of cards in a pack of cards = 52

Number of black cards = 26

Number of king cards = 4 (2 Red, 2 Black)

 

Required, the probability that if a card is drawn either card is black or a king = 

2652 + 452 = 3052 = 1526

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Filed Under: Permutations and Combinations
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Q:

What is the role of NADP+ in photosynthesis?

Answer

NADP - Nicotinamide Adenine Dinucleotide Phosphate is one of the carrier molecules that transfers high-energy electrons from chlorophyll to other molecules.


NADP+ is the molecule that accepts the electrons given by water. Its reduction by the protein FNR (Ferredoxin NADP+ reductase) gives NADPH,H+.


 


NADPH,H+ can be used in the Calvin Cycle to reduce 1,3-Biphosphoglycerate (1,3-BPG) into Glyceraldehyde-3-phosphate (G3P), a monosaccharide. It becomes NADP+ again and the cycle keeps repeating as long as the chloroplast receives sufficient and appropriate light.

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Q:

Which half reaction correctly represents reduction?

A) Fe2+ + e- ---> Fe3+ B) Au3+ + 3e– ---> Au
C) Ag ---> Ag+ + e- D) All of the above
 
Answer & Explanation Answer: B) Au3+ + 3e– ---> Au

Explanation:

A half reaction is either the oxidation or reduction reaction component of a redox reaction. A half reaction is obtained by considering the change in oxidation states of individual substances involved in the redox reaction.

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Filed Under: Chemistry
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