The organelle that is the site of glycolysis is the: MCQ with Answer and Explanation

The organelle that is the site of glycolysis is the:
A. Mitochondria
B. Nucleus
C. Golgi body
D. Cytoplasm
Answer: Option D
Solution (By JKExamLibrary)
Glycolysis, the breakdown of glucose to pyruvate, occurs in the cytoplasm of cells. The Krebs cycle and oxidative phosphorylation occur in mitochondria.

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Practice More Biology Questions

Question #1
The disease caused by the deficiency of vitamin B₁ is:
A. Pellagra
B. Rickets
C. Beriberi
D. Scurvy

Correct Answer: Option C


Explanation:
Beriberi involves neurological and cardiovascular symptoms due to thiamine deficiency, common in polished rice diets. Scurvy is vitamin C, pellagra niacin, rickets D.

This question belongs to: Science Biology
Question #2
The pigment that is responsible for the red color of tomatoes and watermelon is:
A. Lycopene
B. Anthocyanin
C. Beta-carotene
D. Chlorophyll

Correct Answer: Option A


Explanation:
Lycopene is a red carotenoid pigment that accumulates in ripe tomatoes and watermelon. Beta-carotene is orange, chlorophyll green, anthocyanin purple/red in some plants.

This question belongs to: Science Biology
Question #3
In the human body, the 'Pineal gland' is a small endocrine gland located in the epithalamus. It is often referred to as the 'third eye' in some lower vertebrates because:
A. It produces tears
B. It can literally see light
C. It controls eye movement
D. It is photosensitive and regulates circadian rhythms in response to light, and in some reptiles and amphibians, it has a parietal eye structure

Correct Answer: Option D


Explanation:
The pineal gland is a small, pinecone-shaped gland located in the epithalamus, near the center of the brain. In humans, it is not a true eye, but it is photosensitive; it receives information about the light-dark cycle from the retina via the suprachiasmatic nucleus and the sympathetic nervous system, and uses this to regulate the secretion of melatonin, thus controlling circadian rhythms. In some lower vertebrates (like certain reptiles, amphibians, and fish), the pineal complex includes a parietal eye (or 'third eye'), a light-sensitive organ on the top of the head that can literally detect light and shadows, helping with camouflage and predator detection.

This question belongs to: Science Biology