Which organelle is primarily responsible for the synthesis of lipids?
A. Golgi apparatus
B. Lysosome
C. Rough endoplasmic reticulum
D. Smooth endoplasmic reticulum
Answer: Option D
Solution (By JKExamLibrary)
Smooth endoplasmic reticulum (SER) lacks ribosomes and is the site of lipid synthesis, including phospholipids and steroids. It also detoxifies drugs and poisons. Rough ER synthesizes proteins, Golgi modifies and packages molecules, lysosomes degrade waste. SER is abundant in cells producing steroid hormones.
Explanation:
HIV specifically infects and destroys CD4+ T cells, leading to immunodeficiency and AIDS. Without treatment, opportunistic infections occur.
Explanation:
Sericulture is the process of rearing silkworms (primarily Bombyx mori) for the production of silk. The silkworm feeds on mulberry leaves (Morus alba) and spins a continuous filament of silk protein (fibroin) to form a cocoon around itself during its pupal stage. The cocoons are then boiled to kill the pupa and unwind the silk filament for textile production.
Explanation:
The radicle is the embryonic root, emerging first during germination, and develops into the primary root system. The plumule develops into the shoot, hypocotyl is below cotyledons, epicotyl above cotyledons. The radicle grows downward (positively geotropic) to anchor and absorb water.
No comments yet. Be the first to start the discussion!