1. What is the pH of 10.0 mL solution of 0.75 M acetate after adding 5.0 mL of 0

ID: 69385 • Letter: 1

Question

1. What is the pH of 10.0 mL solution of 0.75 M acetate after adding 5.0 mL of 0.10 M HCl (assume a Ka of acetic acid of 1.78x10-5 )?

A. 3.60

B. 3.87

C. 5.90

D. 5.62

E. 4.45

2. Which of the following properties are NOT associated with sensitization of a G protein-coupled receptor?

A. Conformational changes induced by agonist binding.

B. Dissociation of the G protein from the receptor.

C. Rapid hydrolysis of GTP to yield GDP and Pi.

D. Dissociation of the G protein into the G and G.

3. In adipose tissue, prostaglandin E1 activates a PGE1 Recepter and ______ the synthesis of a second messenger that is _________.

A. activates; a cyclic version of AMP, known as cAMP

B. activates; a cysteinyl version of AMP, known as cAMP

C. inhibits; a cyclic version of AMP, known as cAMP

D. inhibits; a cysteinyl version of AMP, known as cAMP

Explain

Ans-2) C , Ans-3) C

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