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Which cell organelle is responsible for energy production?

A.

Ribosome

B.

Nucleus

C.

Golgi apparatus

D.

Mitochondria

Answer and Explanation

The Correct Answer is D

A. Ribosome: Ribosomes are responsible for protein synthesis by translating mRNA into amino acid sequences. They do not produce energy for the cell.

B. Nucleus: The nucleus stores genetic material and regulates cellular activities by controlling gene expression. It does not generate cellular energy directly.

C. Golgi apparatus: The Golgi apparatus modifies, sorts, and packages proteins and lipids for transport within or outside the cell. It is not involved in energy production.

D. Mitochondria: Mitochondria are the “powerhouses” of the cell, generating ATP through cellular respiration. They convert nutrients like glucose and fatty acids into usable energy to fuel cellular functions.


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Related Questions

Correct Answer is A

Explanation

A. The Skull: The skull, or cranium, encases and protects the brain from mechanical injury. It consists of several bones fused together to form a rigid protective structure.

B. The Pelvic Girdle: The pelvic girdle supports the lower limbs and protects some pelvic organs but does not protect the brain.

C. The Vertebral Column: The vertebral column protects the spinal cord and supports the trunk but does not enclose the brain.

D. The Thoracic Cage: The thoracic cage shields the heart and lungs, providing support for respiration, but it does not protect the brain.

Correct Answer is D

Explanation

A. Cranial cavity: The cranial cavity houses the brain and associated structures. It does not contain organs responsible for digestion, so it is not involved in the digestive system.

B. Thoracic cavity: The thoracic cavity contains the heart and lungs within the ribcage. While it is critical for respiration and circulation, it does not house the primary organs of digestion.

C. Pelvic cavity: The pelvic cavity contains the bladder, reproductive organs, and the rectum. While part of the lower digestive tract (rectum) is present here, the majority of digestive organs are located in the abdominal cavity.

D. Abdominal cavity: The abdominal cavity contains the major digestive organs, including the stomach, liver, pancreas, intestines, and gallbladder. It provides the primary space for digestion and nutrient absorption.

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