Biology Questions

Q:

Where are the proteins of the electron transport chain located?

A) mitochondrial matrix B) mitochondrial inner membrane
C) mitochondrial outer membrane D) mitochondrial intermembrane space
 
Answer & Explanation Answer: B) mitochondrial inner membrane

Explanation:

The proteins of the electron transport chain are present in mitochondrial inner membrane in Eukaryotes.

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Q:

Cells use active transport proteins to

Answer

Cells use active transport proteins to create a concentration gradient across a cell membrane.

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Q:

Which among the following do NOT have a perfect pair of sex chromosomes?

A) Only men B) Only women
C) Both men and women D) Neither men nor women
 
Answer & Explanation Answer: A) Only men

Explanation:
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Q:

In unicellular organisms, all functions like digestion, respiration and reproduction are performed by a how many cell(s)?

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: A) 1

Explanation:
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Q:

Haemophilia is a hereditary disease carried by

A) females and expressed by males B) males and expressed by males
C) females and expressed by females D) males and expressed by females
 
Answer & Explanation Answer: A) females and expressed by males

Explanation:

Haemophilia is an inherited bleeding disorder where the blood doesn't clot properly. It is caused when blood does not have enough clotting factor.


The main treatment for hemophilia is called replacement therapy. Concentrates of clotting factor VIII (for hemophilia A) or clotting factor IX (for hemophilia B) are slowly dripped or injected into a vein. These infusions help replace the clotting factor that's missing or low.

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Q:

What is plant cell wall mainly composed of?

A) Lipids B) Vitamin
C) Cellulose D) Protein
 
Answer & Explanation Answer: A) Lipids

Explanation:
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Q:

With which of the following body organ is 'pace-maker' associated?

A) Liver B) Brain
C) Heart D) Lungs
 
Answer & Explanation Answer: B) Brain

Explanation:
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Q:

Which of the following is a risk factor for osteoporosis?

A) Smoking cigarettes B) Drinking alcohol
C) Both A & B D) None of the above
 
Answer & Explanation Answer: C) Both A & B

Explanation:

Osteoporosis makes you more likely to loss bone mass and density resulting in fractures. Smoking cigarettes and drinking alcohol can lead to loss bone mass and density. Oseoporosis is more common in women than men.

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