Question

Which of the structures is responsible for the manufacture of lipids and steroids?

• A. Smooth endoplasmic reticulum
• B. Mitochondria
• C. Ribosomes
• D. Centrioles

Answer 1

The correct option is A

Smooth endoplasmic reticulum

The correct option is A.

Explanation of correct option:

1. Many metabolic processes rely on the smooth endoplasmic reticulum.
2. Plasma membranes are made up of lipids, phospholipids, and steroids.
3. In cells that emit these substances, like testes, ovaries, and skin oil glands, the smooth endoplasmic reticulum is overproduced.

Explanation of incorrect option:

Option B:

1. Lipids are essential for central mitochondrial biogenesis and metabolism functions such as oxidative phosphorylation, protein import and assembly, membrane architecture and structure, and mitochondrial dynamics.

Option C:

1. The smooth endoplasmic reticulum, which lacks ribosomes and is involved in lipid synthesis but not metabolism, steroid hormone generation, or detoxification, performs these roles.
2. Ribosomes function to assemble amino acids to form proteins that are essential to carry out cellular functions.

Option D:

1. Centrioles are two barrel-shaped organelles found near the nuclear envelope in the cytoplasm of animal cells.
2. They help the cell during cell division, i.e., during the process of mitosis and meiosis.

Final answer: Smooth endoplasmic reticulum is responsible for the manufacture of lipids and steroids.