The organ that stores and concentrates bile is the: MCQ with Answer and Explanation

The organ that stores and concentrates bile is the:
A. Gall bladder
B. Pancreas
C. Duodenum
D. Liver
Answer: Option A
Solution (By JKExamLibrary)
The gall bladder, a small pear-shaped sac under the liver, stores and concentrates bile produced by the liver, releasing it into the duodenum in response to cholecystokinin (CCK). The liver makes bile, pancreas secretes enzymes, duodenum is the entry point.

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Question #1
The disease caused by the protozoan Trypanosoma cruzi is:
A. Leishmaniasis
B. Chagas disease
C. Sleeping sickness
D. Malaria

Correct Answer: Option B


Explanation:
Chagas disease is caused by T. cruzi, transmitted by triatomine bugs. Sleeping sickness is T. brucei, malaria Plasmodium, leishmaniasis Leishmania.

This question belongs to: Science Biology
Question #2
The process by which a bacterium acquires genes from a bacteriophage is:
A. Transduction
B. Conjugation
C. Mutation
D. Transformation

Correct Answer: Option A


Explanation:
Transduction is the transfer of bacterial DNA from one bacterium to another by a bacteriophage. Generalized transduction occurs when phage accidentally packages host DNA; specialized transduction involves specific genes near the prophage integration site. Conjugation needs direct contact, transformation free DNA.

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Question #3
Assertion (A): The cell wall of fungi is made of cellulose.
Reason (R): Chitin is a characteristic component of fungal cell walls.
A. A is false, but R is true.
B. Both A and R are true, and R is the correct explanation.
C. A is true, but R is false.
D. Both A and R are true, but R is not the correct explanation.

Correct Answer: Option A


Explanation:
Fungal cell walls contain chitin, not cellulose. Cellulose is found in plant cell walls. Thus, A is false and R is true.

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