Two key organizing principles for large multicellular organisms are

Question: Two key organizing principles for large multicellular organisms are
[A].

prokaryotic cell structure and cell specialization

[B].

cell specialization and communication between cells

[C].

communication between cells and simple nerve reflexes

[D].

simple nerve reflexes and cell specialization

Answer: Option B

Explanation:

No answer description available for this question.

cAMP and cGMP are derived from

Question: cAMP and cGMP are derived from
[A].

ATP and GTP by the actions of adenylate cyclase and guanylate cyclase respectively

[B].

GTP and ATP by the actions of adenylate cyclase and guanylate cyclase respectively

[C].

ATP and GTP by the actions of guanylate cyclase and adenylate cyclase respectively

[D].

none of the above

Answer: Option A

Explanation:

No answer description available for this question.

The binding of ligands to many G-proteins linked receptors leads to shortlived

Question: The binding of ligands to many G-proteins linked receptors leads to shortlived
[A].

increase in the concentration of certain intracellular signaling molecules called second messenger

[B].

decrease in the concentration of certain intracellular signaling molecules called second messenger

[C].

increase in the concentration of certain extracellular signaling molecules called first messenger

[D].

decrease in the concentration of certain extracellular signaling molecules called first messenger

Answer: Option A

Explanation:

No answer description available for this question.

Which of the following comes under the category of cell surface receptor?

Question: Which of the following comes under the category of cell surface receptor?
[A].

Enzyme linked receptors

[B].

Ion-channel linked receptors

[C].

G protein linked receptors

[D].

All of these

Answer: Option D

Explanation:

No answer description available for this question.

The enzyme that catalyzes the splitting of PIP2 into two molecules of inositol triphosphate (IP3) and diacylglycerol in cell signaling, is

Question: The enzyme that catalyzes the splitting of PIP2 into two molecules of inositol triphosphate (IP3) and diacylglycerol in cell signaling, is
[A].

phosphokinase C

[B].

phospholipase C

[C].

phosphodiesterase C

[D].

lipokinase

Answer: Option B

Explanation:

No answer description available for this question.

Which of the following statement is incorrect?

Question: Which of the following statement is incorrect?
[A].

The principal lipophilic hormones that binds to receptors located in the plasma membranes are prostaglandins

[B].

Prostaglandins are synthesized from arachidonic acid

[C].

Prostaglandins act as paracrine signaling molecules

[D].

None of the above

Answer: Option D

Explanation:

No answer description available for this question.