Explanation

Phospholipids form the fundamental bilayer structure of biological membranes, providing a barrier and matrix for proteins.

They have hydrophilic heads and hydrophobic tails, allowing them to spontaneously arrange into stable membranes in aqueous environments.

Explanation

Hepatitis A is primarily spread through the fecal-oral route, often via consumption of contaminated food or water.

It can be prevented by maintaining good hygiene, ensuring safe drinking water, and vaccination.

Explanation

Vitamin B Complex deficiency, specifically Vitamin B1 (Thiamine) deficiency, can cause:

Beriberi, a disease characterized by:

• Fatigue and weakness
• Nerve damage and pain
• Heart problems
• Swelling of legs and feet

Explanation

The heart consists of four chambers in which blood flows.

Blood enters the right atrium and passes through the right ventricle.

The right ventricle pumps the blood to the lungs where it becomes oxygenated.

Explanation

Vitamin C is found in:

• Citrus fruits like oranges, lemons, and grapefruit
• Other fruits like kiwi, guava, strawberries, and cantaloupe
• Vegetables like peppers, broccoli, Brussels sprouts, and potatoes