Biochemistry - Cell Signalling and Transduction

Exercise :: Cell Signalling and Transduction - Section 1

  • Cell Signalling and Transduction - Section 1
26. 

Which of the following is a second messenger?

A. lnositol 1,4,5-triphosphate
B. Diacyl glycerol
C. Phospholipase C
D. Both (a) and (b)

Answer: Option D

Explanation:

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27. 

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:

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28. 

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:

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29. 

Which of the following is a hormone whose action requires a cell surface receptor?

A. Nitric oxide
B. Progesterone
C. Adrenaline
D. Growth factors

Answer: Option C

Explanation:

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30. 

The hormone or ligand can be considered as

A. first messenger
B. second messenger
C. both (a) and (b)
D. none of these

Answer: Option A

Explanation:

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