Biology Questions

Q:

When does DNA replication happen?

A) S - phase B) M - Phase
C) Prophase D) Anaphase
 
Answer & Explanation Answer: A) S - phase

Explanation:

DNA is replicated during the S-Phase in the interphase of a cell.

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Q:

Adamsia (Sea anemone), Pennatula (Sea-pen) are examples of which Phylum?

A) Coelenterata B) Aschelminthes
C) Annelida D) Arthropoda
 
Answer & Explanation Answer: A) Coelenterata

Explanation:
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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:

The size of the pupil is controlled by the

A) Retina B) Iris
C) Cornea D) Lens
 
Answer & Explanation Answer: B) Iris

Explanation:

The size of the pupil is controlled by the Iris when light enters the eye.

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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:

Non-Gonococcal Urethritis is most often caused by

A) chlamydia B) gonorrhea
C) progesterone D) herpes genitalis
 
Answer & Explanation Answer: A) chlamydia

Explanation:

Chlamydial infection is very common in both males and females.

 

NGU (Non-Gonococcal Urethritis) is an infection of the urethra caused by pathogens (germs) other than gonorrhea.

 

Several types of germs cause NGU. The most common and serious is chlamydia.

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Q:

Biological membranes are composed of

A) Phospholipids B) Proteins
C) Carbohydrate groups D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Biological membranes are composed of phospholipids, Proteins and Carbohydrate groups attached to lipids and proteins.

 

Biological_membranes_are_composed_of1559036778.jpg image

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Q:

Which process requires no energy from the cell?

A) Osmosis B) Diffusion
C) Both A & B D) None of the above
 
Answer & Explanation Answer: C) Both A & B

Explanation:

The processes both osmosis and diffusion come under passive transport and require no energy. The movement of solute from the region of higher concentration to the region of lower concentration is nothing but diffusion.

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