Biology Questions

Q:

Total salt content in blood is about

A) 1.85 to 1.9% B) 11.85 to 11.9%
C) 2.85 to 2.9% D) 0.85 to 0.9%
 
Answer & Explanation Answer: D) 0.85 to 0.9%

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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73 10109
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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59 10007
Q:

Most abundant tissue in the body

A) Connective B) Nervous
C) Muscular D) Epithelial
 
Answer & Explanation Answer: A) Connective

Explanation:

We know that, there are four types of tissue in human body. They are 

 

1.Muscular
2.Connective
3.Epithelial
4.Nervous

 

Among these Connective Tissue are most abundant in our body

 

CONNECTIVE TISSUE

Most_abundant_tissue_in_the_body1552975117.jpg image

 

Connective tissue is found in between other tissues everywhere in the body, including the nervous system. It develops from the mesoderm.

 

Functions:

1) Wraps around and cushions and protects organs
2) Stores nutrients
3) Internal support for organs
4) As tendon and ligaments protects joints and attached muscles to bone and each other
5) Runs through organ capsules and in deep layers of skin giving strength

 

The 3 Elements of Connective Tissue are

1) Ground substance – gel around cells and fibers
2) Fibers – provide strength, elasticity and support
3) Cells

 

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41 9870
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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55 9645
Q:

An area of dead myocardial tissue is called

A) an infarct B) stenosis
C) an induration D) hypertrophy
 
Answer & Explanation Answer: A) an infarct

Explanation:

An area of dead myocardial tissue is called an infarct.

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17 9567
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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48 9528
Q:

Which of the following is not a function of cytoskeleton in a cell ?

A) Maintenance of cell shape and structure B) Intracellular transport
C) Cell motility D) Support of the organelle
 
Answer & Explanation Answer: B) Intracellular transport

Explanation:

A cytoskeleton is the frame that gives shape to a cell. And also it offers support, and facilitates movement through three main components:

microfilaments,

intermediate filaments, and

microtubules.

 

The cytoskeleton helps the cell move in its environment and controls the movement of all of the cell's interior workings.

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