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 Biology Questions

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Q:

Which of the following vitamins is synthesized by intestinal bacteria?

A) Vitamin B B) Vitamin A
C) Vitamin D D) Vitamin K
 
Answer & Explanation Answer: D) Vitamin K

Explanation:

Most of the Vitamin K is synthesized by intestinal bacteria in the large intestine.

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Q:

Which word best describes the structure of the cell membrane?

A) Rigid B) Impermeable
C) Nonpolar D) Layered
 
Answer & Explanation Answer: D) Layered

Explanation:
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Q:

The upper chambers of the heart are the

A) Ventricles B) Atria
C) Both A & B D) None of the above
 
Answer & Explanation Answer: B) Atria

Explanation:
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Q:

The fundamental excitable cell in the nervous system is the

A) Nephron B) Axon
C) Neuron D) Dendrite
 
Answer & Explanation Answer: C) Neuron

Explanation:
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Q:

Which tissue makes the plant hard and stiff?

A) Parenchyma B) Sclerenchyma
C) Collenchyma D) Xylem
 
Answer & Explanation Answer: B) Sclerenchyma

Explanation:
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Q:

Activation of the receptors by stimuli is called

A) Adaptation B) Perception
C) Habituation D) Sensation
 
Answer & Explanation Answer: D) Sensation

Explanation:

Sensation is the activation of the receptors by stimuli.

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Q:

Where does transcription occur in eukaryotes?

A) Cytoplasm B) Nucleus
C) Chromosomes D) None of the above
 
Answer & Explanation Answer: B) Nucleus

Explanation:
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Q:

Which organelles supply energy to the cell?

A) Mitochondria B) Cytoplasm
C) Ribosomes D) None of the above
 
Answer & Explanation Answer: A) Mitochondria

Explanation:

Mitochondria which is present in both plant and animal cells supplies energy to the cells and hence called as the powerhouse of the cell.

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