Explanation

• The pharynx passes air into the larynx.
• It is the voice box.
• It is part of the respiratory system.
• The glottis is the opening between the vocal folds that allows air to pass through the larynx.
• The larynx directs air into the trachea, which carries it toward the bronchi and lungs.
• Air pathway: Pharynx → Larynx → Trachea → Bronchi → Lungs.

Last verified on 25-10-2026

Explanation

• Peripheral proteins are located on the inner or outer surface of the cell membrane.
• They are not embedded deeply in the lipid bilayer.
• They perform important functions, including cell signalling, enzymatic activity, and supporting the cell membrane.

Additional information:

• Integral proteins, in contrast, are embedded within the lipid bilayer and may extend across the entire membrane.
• Plasmodesmata are microscopic channels connecting adjacent plant cells, allowing substances and signals to pass between them.

Last verified on 25-10-2026

Explanation

• A, D, E, and K are fat-soluble vitamins.
• Fat-soluble vitamins are absorbed by the body along with dietary fats.
• They are present in foods that contain fats.
• The body stores these vitamins in the liver and fat tissue when they are not in use. 
• Megadoses of fat-soluble vitamins can be toxic.

Last verified on 25-10-2026

Explanation

• Polio can be effectively prevented through vaccines: Oral Polio Vaccine (OPV) and Inactivated Polio Vaccine (IPV).
• There is no cure or medication for polio, only prevention through immunization.

Last verified on 23-10-2026

Explanation

• Most skull bones are connected by fixed joints, also called suture joints.
• These are fibrous, immovable joints that hold the skull bones firmly together and protect the brain.
• The lower jaw is an exception because it forms a movable joint with the skull.

Last verified on 23-10-2026