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Q:

Which two functional groups are always found in amino acids?

A) Carbonyl and amine B) Ketone and amine
C) Amine and carboxyl D) Aldehyde and amine
 
Answer & Explanation Answer: C) Amine and carboxyl

Explanation:

The two functional groups Amine and carboxyl groups are always found in amino acids.

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Q:

Bacteria and archaea are similar in which of the following?

A) Plasma membrane ester linkage B) Possessing prokaryotic cells
C) Peptidoglycan cell walls D) Methionine as the start signal for protein synthesis
 
Answer & Explanation Answer: B) Possessing prokaryotic cells

Explanation:

Bacteria and archaea are similar in possessing prokaryotic cells.

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Q:

Localized area of pus formation in the lungs?

A) Pleural effusion B) Pulmonary abscess
C) Pleurisy D) Pulmonary edema
 
Answer & Explanation Answer: B) Pulmonary abscess

Explanation:

Localized area of pus formation in the lungs is called Pulmonary abscess.

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Q:

Which of the following statements about DNA replication is true?

A) Single‑strand binding proteins stabilize the open conformation of the unwound DNA. B) Okazaki fragments are DNA fragments synthesized on the leading strand.
C) DNA polymerase adds dNTP monomers in the 3′-5′ direction. D) DNA gyrase unwinds the DNA double helix.
 
Answer & Explanation Answer: A) Single‑strand binding proteins stabilize the open conformation of the unwound DNA.

Explanation:
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Q:

Which organ does detoxification and produces chemicals needed for digestion?

A) Salivary glands B) Pancreas
C) Thyroid gland D) Liver
 
Answer & Explanation Answer: D) Liver

Explanation:
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Q:

Which of these is a human disease caused by bacteria?

A) TB B) Ascariasis
C) Chickenpox D) Common cold
 
Answer & Explanation Answer: A) TB

Explanation:

Bacteria which causes disease are called Pathogenic Bacteria. TB is caused by bacteria.

 

Some of the diseases caused by bacteria are::

1. Tuberculosis, TB (affects the lungs)

2. Salmonella (causes food poisoning)

3. Whooping cough (affects the lungs)

4. Septic Sore Throat

 

 

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Q:

Which RNA base pairs with the adenine in DNA?

A) Thymine B) Cytosine
C) Both A & B D) Uracil
 
Answer & Explanation Answer: D) Uracil

Explanation:

In DNA, adenine pairs with Thymine. Similarly, in RNA, due to absence of thymine in RNA and the same structure with uracil helps to pair with adenine.

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Q:

Where does digestion of protein begin?

A) Mouth B) Pharynx
C) Stomach D) Liver
 
Answer & Explanation Answer: C) Stomach

Explanation:

Three main enzymes, pepsin secreted by the stomach and trypsin and chymotrypsin secreted by the pancreas, break down food proteins into polypeptides that are then broken down by various exopeptidases and dipeptidases into amino acids.

 

Hence, digestion of protein begin in stomach.

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