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 General Science Questions

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Q:

The brain and spinal cord are two components of the

A) Central nervous system B) Peripheral nervous system
C) Both A & B D) None of the above
 
Answer & Explanation Answer: A) Central nervous system

Explanation:

The brain and spinal cord are two components of the Central nervous system which are responsible for sensory information.

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Q:

DNA is a long chain made of repeating units called aminoacids.

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

The repeating units that are used to form the helical DNA structure are called nucleotides.

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Q:

Biogeochemical cycles are crucial to ecosystem function because

A) they keep the planet warm enough for living things to survive B) energy flows through ecosystems in one direction only and is eventually dissipated as heat
C) they prevent catastrophic extinctions D) nutrients and other life-sustaining molecules are in limited supply and must be continually recycled
 
Answer & Explanation Answer: D) nutrients and other life-sustaining molecules are in limited supply and must be continually recycled

Explanation:

Biogeochemical cycles are crucial to ecosystem function because ::

 

1. Chemical elements are available in only limited amounts and must be recycled.

2. Nutrients and other life-sustaining molecules are in limited supply and must be continually recycled.

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Q:

The chief constituent of gobar gas is

A) Methane B) Carbon dioxide
C) Ethane D) Hydrogen
 
Answer & Explanation Answer: A) Methane

Explanation:
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Q:

Lime mortar is generally made with

A) Hydraulic lime B) Quick lime
C) Fat lime D) Plain lime
 
Answer & Explanation Answer: A) Hydraulic lime

Explanation:

Lime mortar is generally made with Hydraulic lime.

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Q:

To evaluate a piece of media means to

A) disseminate the contents to a wide audience B) communicate the information to a group of people
C) express the main idea in a clear and specific way D) judge the purpose and message in a thoughtful way
 
Answer & Explanation Answer: D) judge the purpose and message in a thoughtful way

Explanation:
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Q:

Elastomers can extend upto

A) ten times their original dimensions B) seven times their original dimensions
C) five times their original dimensions D) three times their original dimensions
 
Answer & Explanation Answer: B) seven times their original dimensions

Explanation:

An elastomer is a polymer with viscoelasticity which have low youngs modulus with weak intermolecular forces when compared with other materials.

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Q:

The most abundant gas in the atmosphere is

A) Nitrogen B) Argon
C) Oxygen D) Helium
 
Answer & Explanation Answer: A) Nitrogen

Explanation:

The atmosphere is a mixture of several gases. Nitrogen is the most abundant gas in the atmoshere and oxygen is next to it. It is 78% in the atmosphere and 21% is oxygen. Remaining 1% is all other gases like argon, hydrogen, neon, etc...

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