Questions

Q:

Which discovery is attributed to Phoebus Levene?

A) identification of ribose and deoxyribose B) recognition of RNA as DNA’s messenger
C) extraction and observation of DNA D) construction of an accurate DNA model
 
Answer & Explanation Answer: A) identification of ribose and deoxyribose

Explanation:

Phoebus Levene was an organic chemist in the early 1900's. He is perhaps best known for his incorrect tetranucleotide hypothesis of DNA. He is who studied the structure and function of nucleic acids.

 

The discovery of Identification of Ribose and Deoxyribose is attributed to Phoebus Levene.

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Q:

The main result of aerobic respiration is the

A) production of lactic acid as an end product B) production of ATP from the breakdown of glucose
C) conversion of radiant energy into chemical energy D) storage of energy in a polysaccharide
 
Answer & Explanation Answer: B) production of ATP from the breakdown of glucose

Explanation:

The three steps within the aerobic respiration process are glycolysis, the citric acid cycle, and oxidative phosphorylation.

Photosynthesis builds glucose, and what was built in photosynthesis is broken down during aerobic respiration.

 

Hence, production of ATP from the breakdown of glucose is the main result of aerobic respiration.

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Q:

Goosebumps are caused by contractions of the

A) Muscles B) Nerves
C) Bones D) All of the above
 
Answer & Explanation Answer: A) Muscles

Explanation:

Goosebumps are caused by the contraction of the tiny muscles attached to hair follicles. These muscles are arrectores pilorum muscles.

 

Goosebumps_are_caused_by_contractions_of_the1560862968.png image

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Q:

Which state has recorded highest number of tigers in 2018?

A) Karnataka B) Madhya Pradesh
C) Chhattisgarh D) Uttarakhand
 
Answer & Explanation Answer: B) Madhya Pradesh

Explanation:

India being number one in the Tiger population all over the world, Madhya Pradesh state has the highest number of tigers with 526 tigers and Karnataka is second with 524.

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Q:

One billionth of a second is called

A) microsecond B) picoseconds
C) millisecond D) nanosecond
 
Answer & Explanation Answer: D) nanosecond

Explanation:

A nanosecond (ns) is an SI unit of time equal to one thousand-millionth of a second or one billionth of a second.

 

  • That is, 1/1,000,000,000 of a second, or 10^−9 seconds.
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Q:

The study of trees is called

A) Histology B) Andreology
C) Sistology D) Dendrology
 
Answer & Explanation Answer: D) Dendrology

Explanation:

The study of trees is called Dendrology.

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Q:

Which memory needs refresh?

A) DRAM B) SRAM
C) ROM D) All of the above
 
Answer & Explanation Answer: A) DRAM

Explanation:

Memory refresh is the process of periodically reading information from an area of computer memory and immediately rewriting the read information to the same area without modification, for the purpose of preserving the information.

DRAM1532669979.png image

Memory refresh is a background maintenance process required during the operation of semiconductor dynamic random-access memory (DRAM), the most widely used type of computer memory.

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Q:

which is a best way to measure Ground Distance?

Answer

Pace Count is a way to measure to Ground Distance.


Pace Count is nothing but regular single natural step of about 30 inches long.

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