The hormone that stimulates the pancreas to secrete bicarbonate is: MCQ with Answer and Explanation

The hormone that stimulates the pancreas to secrete bicarbonate is:
A. Motilin
B. Cholecystokinin
C. Gastrin
D. Secretin
Answer: Option D
Solution (By JKExamLibrary)
Secretin is released from the duodenum when acidic chyme enters, stimulating the pancreas to secrete bicarbonate-rich fluid, neutralizing the acid.

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The 'Red Data Book' keeps records of:
A. Endangered and threatened species
B. Human population
C. All living organisms
D. Fossil records

Correct Answer: Option A


Explanation:
The IUCN Red List (Red Data Book) documents the conservation status of plants, animals, and fungi, categorizing species from Extinct to Least Concern. It highlights species at risk of global extinction. It is a critical tool for conservation policy and action. Endangered species like the Bengal tiger and snow leopard are listed. The Red Data Book was first published by IUCN in 1964.

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Question #2
Assertion (A): Green plants are called autotrophs.
Reason (R): They can synthesize their own food by photosynthesis.
A. Both A and R are true, and R is the correct explanation.
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C. A false, R true.
D. A true, R false.

Correct Answer: Option A


Explanation:
Autotrophs produce organic compounds from inorganic CO₂ and water using light energy (photosynthesis). This exactly defines green plants. So both are true, and R explains A.

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The process by which white blood cells engulf pathogens is called:
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Correct Answer: Option B


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Phagocytosis ('cell eating') is the process by which cells like macrophages and neutrophils engulf solid particles, including pathogens, by extending pseudopodia to form a phagosome, which fuses with lysosomes for degradation. Pinocytosis is 'cell drinking', uptake of fluid. Exocytosis is secretion. Dialysis is artificial separation. Phagocytosis is a key innate immune defense.

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