Question 1:

Which of the following is not a mode of cell communication?

Explanation: Endocytosis is a process of cellular uptake and is not a mode of cell communication. Therefore, option A is correct.

Question 2:

Which of the following is a direct cell-to-cell communication process?

Explanation: Synaptic signaling involves direct cell-to-cell communication through specialized structures called synapses. Therefore, option C is correct.

Question 3:

Which type of signaling molecule can pass through the cell membrane and bind to intracellular receptors?

Explanation: Lipophilic signaling molecules are hydrophobic and can pass through the cell membrane to bind to intracellular receptors. Therefore, option C is correct.

Question 4:

Which of the following is an example of paracrine signaling?

Explanation: Paracrine signaling involves the release of signaling molecules by neighboring cells to influence nearby target cells. The release of growth factors by neighboring cells is an example of paracrine signaling. Therefore, option C is correct.

Question 5:

Which of the following is an example of endocrine signaling?

Explanation: Endocrine signaling involves the release of hormones into the bloodstream to reach distant target cells. Therefore, option C is correct.