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GK MCQ Questions with Answers

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Q :  

Which is the hardest substance in the human body?

(A) Kneecap

(B) Finger Nails

(C) Tooth Enamel

(D) Skull Bones

Correct Answer : C

Q :  

Which organism causes the Kala-azar disease?

(A) Amoeba

(B) Plasmodium

(C) Planaria

(D) Leishmania

Correct Answer : D
Explanation :

1. Kala-azar disease is caused by the protozoa Leishmania donovani.

2. It is a parasitic protozoa that belongs to the class Mastigophora or Flagellata. It is caused by sand fly (Phlebotomus) which causes kala azar or dumdum fever.


Q :  

Involuntary actions like blood pressure and vomiting are controlled by which part of hindbrain?

(A) Medulla oblongata

(B) Pons

(C) Cerebellum

(D) Cerebrum

Correct Answer : A
Explanation :

1. Involuntary actions like blood pressure, salivation and vomiting are controlled by the medulla.

2. The medulla oblongata, also called the medulla, is the lowest part of the brain and the lowest part of the brainstem.

3. The medulla oblongata or simply the medulla is a long stem-like structure that is part of the brain.


Q :  

Which one of the following is not an antioxidant? 

(A) Vitamin E

(B) Selenium

(C) Lycopene

(D) Aspartame

Correct Answer : D
Explanation :

All of the following are peroxidases.

(A) Vitamin E

(B) Selenium

(C) Lycopene

Q :  

First mammal to be cloned was -

(A) Sheep

(B) Goat

(C) Rat

(D) Frog

Correct Answer : A
Explanation :

Dolly (5 July 1996 – 14 February 2003) was a female domestic sheep, and the first mammal cloned from an adult somatic cell using the process of nuclear transfer.


Q :  

Which is called the emergency hormone in the human body?

(A) Thyroxin

(B) Insulin

(C) Adrenaline

(D) Progesterone

Correct Answer : C
Explanation :

1. It is secreted in the adrenal gland into the medulla as well as in some neurons of the central nervous system.

2. It is known as an emergency hormone because it initiates an instant response that causes the person to think about the stress and react quickly.


Q :  

The escape velocity of the Earth is?

(A) 15.0 km/sec

(B) 21.1 km/sec

(C) 7.0 km/sec

(D) 11.2 km/sec

Correct Answer : D
Explanation :

1. The lowest velocity used to escape the gravitational pull of the Earth is called escape velocity.

2. The escape velocity of the Earth is 11.2 km/second.


Q :  

Pancreatic juice contains which enzyme that breaks down emulsified fats?

(A) Lipase

(B) Pepsin

(C) Trypsin

(D) Amylase

Correct Answer : A
Explanation :

1. Pancreatic juice contains a lipase enzyme, which decomposes emulsified fats.

2. Lipase: It is an enzyme found in pancreatic juice and responsible for the breakdown of emulsified fats.


Q :  

Which one of the following is not correctly matched?

(A) DPT - Vaccine

(B) DOTS - Tuberculosis

(C) Adrenaline - Hormone

(D) AB+ Blood group - Universal Donor

Correct Answer : D
Explanation :

All of the following are matched. 

(A) DPT - Vaccine

(B) DOTS - Tuberculosis 

(C) Adrenaline - Hormone


Q :  

Which of the following forests are often called the "Lungs of the Planet"?

(A) Tundra forest

(B) Taiga forest

(C) Monsoon forest

(D) Amazon rain forests

Correct Answer : D
Explanation :

1. Amazon rain forests have also been called the lungs of planet Earth.

2. These rain forests of South America are the largest and have the highest diversity of tropical rain forests on our planet.

3. They provide 20% of the total oxygen of our planet.


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