Which of the following is characteristic of a buffer? a. The pH will go down sig

Question

Which of the following is characteristic of a buffer? a. The pH will go down significantly when OH^- is added to the buffer b. The pH will go down very slightly when OH^- is added to the buffer, c. The pH will go up significantly when OH^- is added to the buffer d. The pH will go up very slightly when OH^- is added to the buffer. 4. When will a protein have a net charge of zero? a. never b. when the pH is equal to its isoelectric point c. when the pH is above its isoelectric point d. when the pH is below its isoelectric point 5. Which of the following defines the primary structure of proteins? a. the geometric arrangement of the backbone atoms b. the geometne arrangement of the side chains c the sequence of the amino acids d. all of the above 6. How many different ammo acids are found in human proteins? a. 10 b. 20 c. 200 d. 1000 7. Which of the following contains a disulfide bond? a. alanine b. cysteine c. cystine d. methionine

Explanation / Answer

3)d

4)b

5)

6)b

7)b

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