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Q:

Who discovered the monomers of nucleic acids?

A) James Watson, Francis Crick, and Rosalind Franklin B) Friedrich Miescher
C) Phoebus Levene D) Gerardus Johannes Mulder and Jöns Jacob Berxelius
 
Answer & Explanation Answer: C) Phoebus Levene

Explanation:

Deoxyribonucleic acid (DNA) is a nucleic acid polymer composed of monomers called nucleotides. Nucleotides are composed of three components: (1) a pentose sugar; (2) a nitrogenous base; and (3) one to three phosphate groups.

Phoebus Levene, a Russian biochemist was the first to discover the nucleotide and the first to correctly identify the way nucleic acid molecules, DNA.

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Filed Under: Biology
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Q:

'Pencillin' which is used as an antibiotic is obtained from 

A) Bacteria B) Fungi
C) Algae D) Lichens
 
Answer & Explanation Answer: B) Fungi

Explanation:
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Filed Under: General Science

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Q:

In 1955, Imperial Bank of India, a leadimg commercial bank of that time was nationalised and renamed as:

A) Central Bank of India B) Bank of India
C) Indian Bank D) State Bank of India
 
Answer & Explanation Answer: D) State Bank of India

Explanation:
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Filed Under: Indian Economy

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Q:

Nobel Prize is established in  ?

A) 1931 B) 1911
C) 1901 D) 1951
 
Answer & Explanation Answer: C) 1901

Explanation:
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Filed Under: General Science
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Q:

A Radioactive subatance emits

A) alpha particles B) beta particle
C) gamma particle D) all of the three
 
Answer & Explanation Answer: D) all of the three

Explanation:
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Filed Under: Chemistry

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Q:

The Kinetic energy of gas molecules

A) is unaffected by temperature variations B) decreases with increase of temperature
C) increases with decrease of temperature D) increases with increase of temperature
 
Answer & Explanation Answer: D) increases with increase of temperature

Explanation:

Kinetic Energy K.E = 12mV2  or 

K.E ∝V2, Where 'm' is the mass and 'v' is the velocity of molecules.

 

Velocity is proportional to temperature. Hence, KE is proportional to temperature and would increase with temperature.

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Filed Under: Chemistry
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Q:

Number of moles of CO2 present in 24 grams of carbon is

A) 0.5 B) 1
C) 2 D) 0.25
 
Answer & Explanation Answer: C) 2

Explanation:

1 mole of CO2 contain 12gms of carbon and 44 gms of CO2

therefore  24 gms of carbon is present in 88 gms of CO2 or 2 moles of CO2

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Filed Under: Chemistry

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Q:

Answer the Following Puzzle.

Number_Puzzles_Typical_Aptitude_Questions_and_Answers1585548407.png image

A) 1111 B) 4311
C) 1143 D) 4343
 
Answer & Explanation Answer: C) 1143

Explanation:

Starting with the top 3 digit number, the first digit increases by 2 as you descend,from 1 to 11. The middle digit decreases by 1 each time,and the right hand digit alternates between 5 and 3

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Filed Under: Number Puzzles
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