Biology - Study Mode

[#641] Which organelle in the cell, other than nucleus contains DNA?
Correct Answer

(B) Mitochondria

Explanation

Solution: Mitochondria contain DNA other than nucleus.

[#642] The single membrane surrounding vacuoles in plant cells is known as
Correct Answer

(C) Tonoplast

Explanation

Solution: Also called the vacuolar membrane, the tonoplast is the cytoplasmic membrane surrounding a vacuole, separating the vacuolar contents from the cell's cytoplasm.

[#643] Cellular respiration occurs in
Correct Answer

(C) Mitochondria

Explanation

Solution: Cellular respiration occurs in the double-membrane organelle called the mitochondrion.

[#644] Reflex actions are controlled by
Correct Answer

(A) The Spinal Chord

Explanation

Solution: A reflex arc is a neural pathway that controls a reflex. In vertebrates, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord. This allows for faster reflex actions to occur by activating spinal motor neurons without the delay of routing signals through the brain.

[#645] What part of the body controls balance?
Correct Answer

(B) Cerebellum

Explanation

Solution: The cerebellum, in the back of the brain, controls balance, coordination and fine muscle control (e.g., walking). It also functions to maintain posture and equilibrium.