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 Biology Questions

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Q:

Which bacteria cause the greatest harm in the food industry?

A) Recycling B) Digestive
C) Fermenting D) Pathogenic
 
Answer & Explanation Answer: D) Pathogenic

Explanation:

Pathogenic bacteria cause the greatest harm in the food industry.

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Q:

karl Landsteiner discovered

A) Blood corpuscles B) Blood groups
C) Blood vessels D) Proteins in Blood
 
Answer & Explanation Answer: B) Blood groups

Explanation:
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12 5058
Q:

Which organ filters blood in human body?

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

Explanation:

The organ which filters blood in human body are kidneys.

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Q:

Which of the following is the largest phyllum in the animal kingdom in respect of number of species

A) Annalida B) Platyhelminthes
C) Chordata D) Arthropoda
 
Answer & Explanation Answer: D) Arthropoda

Explanation:
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Q:

What is scientific name of "Cotton"  ?

A) Azadhirachta Indica B) Phaseolies auicus
C) Gossypium Herbaceum D) Ficus Benghalensis
 
Answer & Explanation Answer: C) Gossypium Herbaceum

Explanation:
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23 5001
Q:

Which of the following statements about ddntps is true?

A) They have a hydrogen at the 3’ carbon of the sugar. B) DNA polymerase can add a new dNTP to a 3’ ddNTP.
C) They have a free 3’-hydroxyl group on the ribose sugar. D) They have an oxygen at the 2’ carbon of the ribose sugar.
 
Answer & Explanation Answer: A) They have a hydrogen at the 3’ carbon of the sugar.

Explanation:

ddNTPs - Dideoxynucleotides and abbreviated as ddNTPs.

 

They are chain-elongating inhibitors of DNA polymerase, used in the Sanger method for DNA sequencing.

 

They have a hydrogen at the 3’ carbon of the ribose sugar.

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Q:

The brain is covered by

A) meninges B) skin
C) bone D) all the above
 
Answer & Explanation Answer: D) all the above

Explanation:

The central nervous system ( brain and spinal card ) are invested with the meninges which nourish and protect the system .This again is enclosed inside a bony box which has the skin above it

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14 4974
Q:

Which of the following is a nucleotide found in DNA?

A) Deoxyribose + Phosphate Group + Polymerase B) Adenine + Phosphate Group + Thymine
C) Deoxyribose + Phosphate Group + Thymine D) Cytosine + Phosphate Group + Uracil
 
Answer & Explanation Answer: C) Deoxyribose + Phosphate Group + Thymine

Explanation:

We know that, the nucleotide in DNA is of the form deoxyribose + phosphate group + polymerase.

 

Which_of_the_following_is_a_nucleotide_found_in_DNA1553496102.jpg image

 

Hence, Deoxyribose + Phosphate Group + Thymine is the only option in that form of nucleotide in DNA.

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