The organ that removes old red blood cells and stores iron is the: MCQ with Answer and Explanation

The organ that removes old red blood cells and stores iron is the:
A. Kidney
B. Liver
C. Bone marrow
D. Spleen
Answer: Option A
Solution (By JKExamLibrary)
The spleen filters blood, removing aged or damaged RBCs, recycles iron, and stores platelets. The liver also processes hemoglobin products, but the spleen is the primary organ for RBC removal. The kidneys filter blood but don't remove RBCs.

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Practice More Biology Questions

Question #1
Which organelle is the site of photosynthesis?
A. Golgi body
B. Chloroplast
C. Endoplasmic reticulum
D. Mitochondria

Correct Answer: Option B


Explanation:
Chloroplasts contain chlorophyll and thylakoids, where light reactions occur, and stroma for the Calvin cycle. They convert light energy to chemical energy.

This question belongs to: Science Biology
Question #2
Which of the following animals belongs to the class Chondrichthyes?
A. Hippocampus
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C. Pristis (Sawfish)
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Correct Answer: Option C


Explanation:
Chondrichthyes are cartilaginous fishes with a skeleton made entirely of cartilage, a ventral mouth, and lack operculum. Pristis (sawfish), Scoliodon (dogfish), and Carcharodon (great white shark) belong to this class. Labeo rohita (Rohu) and Catla catla are Osteichthyes (bony fishes). Hippocampus (seahorse) is also a bony fish. Exam tip: Chondrichthyes = cartilaginous; Osteichthyes = bony.

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Question #3
Which of the following statements about the circulatory system is correct?
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B. The foramen ovale is a valve in the adult heart.
C. The heart of a fish has four chambers.
D. Blood pressure is highest in the veins.

Correct Answer: Option A


Explanation:
The hepatic portal system directs nutrient-rich blood from intestines to liver. Blood pressure is highest in arteries; fish have two-chambered heart; foramen ovale is a fetal structure that closes after birth.

This question belongs to: Science Biology