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 Biology Questions

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Q:

The study of relation of animals and plants to their surroundings is called__________

A) Ecology B) Ethrology
C) Genealogy D) Iconology
 
Answer & Explanation Answer: A) Ecology

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Q:

Mangroves are plants that have

A) Modified Roots B) Modified Stems
C) Respiratory Roots D) Respiratory Stems
 
Answer & Explanation Answer: C) Respiratory Roots

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Q:

....... produces a usable form of energy for the cell.

A) Ribosomes B) Plastids
C) Mitochondria D) Chloroplast
 
Answer & Explanation Answer: C) Mitochondria

Explanation:

Mitochondria are organelles that generate most of the chemical energy needed to power the cell's biochemical reactions. Hence, thay are also called as Power house of the cell.

 

mitochondria1593761207.jpg image

 

* Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).

 

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Q:

Which plant cell organelle contains its own dna and ribosomes?

A) mitochondria B) Chloroplasts
C) Both A & B D) Vacuole
 
Answer & Explanation Answer: C) Both A & B

Explanation:

The plant cell organelles, "The power house of the cell" mitochondria and the chloroplasts contains their own DNA and ribosomes.

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Q:

In roots, the protoxylem lies towards periphery and metaxylem lies towards the centre. Such arrangement of primary xylem is called ____________.

A) Xylem fibres B) Xylem parenchyma
C) Exarch D) Endarch
 
Answer & Explanation Answer: C) Exarch

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Q:

Which one of the following weeds is effective in controlling water pollution caused by industrial effluents?

A) Parthenium B) Elephant grass
C) Water hycinth D) Mogar grass
 
Answer & Explanation Answer: A) Parthenium

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Q:

Which of the following statements about enzymes is not true?

A) all enzymes have the same shape as their substrates B) enzymes are proteins
C) enzymes work best at a specified ph D) the shape of an enzyme allows it to do its job
 
Answer & Explanation Answer: A) all enzymes have the same shape as their substrates

Explanation:

All enzymes have the same shape as their substrates is the FALSE statement regarding enzymes.

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Q:

Pellagra and Scurvy are caused by which pair of vitamin deficiency respectively _______________

A) VitaminC and VitaminD B) VitaminB-12 and VitaminC
C) VitaminC and VitaminA D) Vitamin A and VitaminB-12
 
Answer & Explanation Answer: B) VitaminB-12 and VitaminC

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