1. Which of these statements is TRUE? a) Buffering is the phenomenon whereby tha
ID: 590331 • Letter: 1
Question
1. Which of these statements is TRUE?
a) Buffering is the phenomenon whereby that around the pKa the pH of a solution does not change appreciably even when large amounts of acid or base are added.
b) A buffer is a mixture of an acid and its conjugate weak base.
c) A buffer may have a pH below, above, or right near to 7.
d) A buffer is special in that it will resist pH change upon addition of strong (or weak) acid or base.
e) all of the above
2. The source of glucose in our diet is
A Starch
B Sucrose, and other disaccharides
C Lactose
D Glucose and other monosaccharides
E all of the above
3. Which of the following biomolecules are naturally occurring antioxidants?
a) vitamin E (tocopherol)
b) urate
c) vitamin C
d) beta- carotene at low P02
e) all of the above
Explanation / Answer
The answers are:
1) (E) all of the above
Because all the given statements regarding buffer are correct.
2) (E) all of the above
Glucose is present in Starch,Sucrose,Lactose, monosaccharides, glucose and disaccharides.
3) (e) all of the above
The naturally occuring antioxidants are vitamin E, urate, vitamin C and beta-carotene at low P02.
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