Biology Questions

Q:

What do eukaryotic cells have that prokaryotic cells do not?

A) Nucleus B) Cytoplasm
C) Ribosomes D) DNA
 
Answer & Explanation Answer: A) Nucleus

Explanation:

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Eukaryotic cells contain membrane-bound organelles, including a nucleus. Eukaryotes can be single-celled or multi-celled, such as you, me, plants, fungi, and insects.

 

Whereas Prokaryotic cells do not contain a nucleus or any other membrane-bound organelle. Bacteria are an example of prokaryotes.

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16 7593
Q:

The enzyme that is necessary to bring about clotting of blood is 

A) peptidase B) amylase
C) lipase D) thrombokinase
 
Answer & Explanation Answer: D) thrombokinase

Explanation:

The clotting of blood is a chain reaction initiated by the enzyme Thrombokinase produced by the platelets. This causes Prothrombin and calcium salts in plasma to join and produce thrombin. Thrombin combines with Fibrinogen to produce Fibrin threads which entangles the corpuscles  to create a clot.

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33 7144
Q:

Only male frog produce croacking sound because ____

A) Female frog have no larynx B) Female frog have larynx but no vocal cord
C) Male frog have three pair of vocal cord D) Male frog can magnify their voice with the help of sound box
 
Answer & Explanation Answer: A) Female frog have no larynx

Explanation:
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Q:

Which one of the following vitamins is known as the anti sterile factor  ?

A) Ascorbic acid B) Riboflavin
C) Niacin D) Retinol
 
Answer & Explanation Answer: B) Riboflavin

Explanation:
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Q:

The Vitamin required for the synthesis of nucleic acid is

A) Tocoferorl B) Folic acid
C) Cyanocobalamine D) Riboflavin
 
Answer & Explanation Answer: B) Folic acid

Explanation:
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37 6756
Q:

Damage to hearing is caused by sounds which exceed

A) 70 decibels B) 80 decibels
C) 100 decibels D) 120 decibels
 
Answer & Explanation Answer: D) 120 decibels

Explanation:

High frequency sound attacks the tympanic memberance and makes it defective. 120 decibels is too high a pitch to be heard and therefore it impairs the hearing ability.

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30 6618
Q:

Tissue in which cells have lost the capacity of cell division 

A) Mesristmatic tissue B) Permanent tissue
C) Both a and b D) None of these
 
Answer & Explanation Answer: B) Permanent tissue

Explanation:
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18 6601
Q:

The leaves used as wrappers for bides are obtained from which one of the following ?

A) Shikakai B) Rudraksha
C) Tendu D) Lemon grass
 
Answer & Explanation Answer: C) Tendu

Explanation:
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