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 Biology Questions

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Q:

Plants grow in size because of 

A) addition of cells B) increase in size of cells
C) enlargement of cells D) elongation of cells
 
Answer & Explanation Answer: A) addition of cells

Explanation:

Plants grow in size both in height and in grith. Enlargement  of cells already present cannot contribute much to the growth. Only addition of more and more cells could increase the size of the plant considerably.

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Q:

All enzymes are proteins.

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

Explanation:

All enzymes are proteins but all proteins are not enzymes since, enzymes are subset of proteins.

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Q:

Cranial bones develop

A) within fibrous membranes B) within osseous membranes
C) from cartilage models D) from a tendon
 
Answer & Explanation Answer: A) within fibrous membranes

Explanation:
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Q:

The animals in which the body cavity is absent are known as __________.

A) Coelomates B) Wild
C) Pseudocoelomates D) Acoelomates
 
Answer & Explanation Answer: D) Acoelomates

Explanation:
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Q:

Which occurs during transcription?

A) Proteins are produced B) Ribosomes produces
C) DNA information is copied to RNA D) All of the above
 
Answer & Explanation Answer: C) DNA information is copied to RNA

Explanation:

Transcription is the process of copying the genetic material or information that is the DNA to messenger RNA (mRNA.

 

transcription_translation1531736868.jpg image

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Q:

The two purines in DNA are

A) Adenine & Thymine B) Thymine & Uracil
C) Guanine & Uracil D) Adenine & Guanine
 
Answer & Explanation Answer: D) Adenine & Guanine

Explanation:

The purines are bases in the DNA. The two purines in DNA are Adenine and Guanine. These two purines forms hydrogen bonds with their complimentary pyrimidines such as Thymine and Cytosine to keep the two rails of the DNA molecule together.

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Q:

Which describes how mRNA is used by a cell?

A) It is used to move information to other cells. B) It is used to check DNA for mutations.
C) It is used to replicate DNA for mitosis. D) It is used to transfer genetic information.
 
Answer & Explanation Answer: D) It is used to transfer genetic information.

Explanation:

A RNA copy of a DNA gene is called as messenger RNA or mRNA. mRna is used in translation because information is translated from one language (nucleotides) into another (amino acids).

 

Hence, mRNA is used to transfer genetic information by a cell.

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Q:

Dysfunctional behaviors are maladaptive which means that they

A) are medicated B) interfere with everyday life
C) cause of stress D) all of the above
 
Answer & Explanation Answer: B) interfere with everyday life

Explanation:

Dysfunctional behaviors are maladaptive which means that they interfere with everyday life.

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