9
Q:

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

A) peptidase B) amylase
C) lipase D) thrombokinase

Answer:   D) thrombokinase



Explanation:

The clotting of blood is a chain reaction initiated by the enzyme thrombokinase produced by the platelets. This causes prothrombin to be converted into thrombin in the presence of Ca++ion.

Thrombin combines with fibrinogen  to produce fibrin threads which entangles the corpuscles to form the clot.

Subject: Biology
Exam Prep: AIEEE , GATE
Q:

Which of these is the energy conversion that happens in the process called photosynthesis?

 

A) Potential energy to chemical energy   B) Light energy to chemical energy  
C) Heat energy to chemical energy   D) Heat energy to light energy  
 
Answer & Explanation Answer: B) Light energy to chemical energy  

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Exam Prep: AIEEE , Bank Exams

2 379
Q:

The plant hormone that helps in the growth of the stem is ...........

 

A) Gibberellins B) Cytokinins
C) Auxins D) Insulin
 
Answer & Explanation Answer: C) Auxins

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Filed Under: Biology
Exam Prep: Bank Exams

3 423
Q:

The pressure variations inside the inner ear are turned into electrical signals by the:

 

A) Cochlea B) Hammer
C) Stirrup D) Anvil
 
Answer & Explanation Answer: A) Cochlea

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1 1100
Q:

What is the straight tube, about 40 cm long, that carries sperms to the seminal vesicles, called?

 

A) Urethra B) Penis
C) epithelial D) connective
 
Answer & Explanation Answer: C) epithelial

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3 598
Q:

Xylem is a/an ......... tissue.

 

A) simple permanent B) complex permanent
C) epithelial D) connective
 
Answer & Explanation Answer: B) complex permanent

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2 239
Q:

The carpel contains ............

 

A) Pollen grains B) Sepals
C) Petals D) Ovules
 
Answer & Explanation Answer: D) Ovules

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Exam Prep: Bank Exams

2 253
Q:

Chiropody is a branch of science related to which part of the body?

 

A) Liver B) Kidney
C) Feet D) Lungs
 
Answer & Explanation Answer: C) Feet

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Exam Prep: Bank Exams

2 1565
Q:

Pernicious anaemia is caused by the deficiency of vitamin .......

 

A) B2 B) B6
C) B1 D) B1
 
Answer & Explanation Answer: D) B1

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Exam Prep: Bank Exams , AIEEE

1 780