BIOC 3021 PRACTICE EXAM 1 EXAMQUESTIONS AND ANSWERS 2024/2025 |
VERIFIED
A buffer solution is made from a weak acid, HA (pKa 6.0) and its conjugate base A-. What is the ratio of
the base A- to the acid HA at pH 5.0? - pH = pKa + log[A-]/[HA]
5 = 6 + log[A-]/[HA]
-1 = log [A-]/[HA]
10^-1 = ratio
raio = 0.1
Which of these elements is the least common in organic compounds within living cells?
a) C
b) F
c) S
d) N - B- fluoride
If the hydrogen ion
concentration of the blood increases ten-fold, how much does the pH change? - pH decreases one
unit
If the pH changes from 7.0 to 6.0 which amino acid R-group is the most affected?
(Hint: The most affected R-group is the one with a pK the closest to pH 7.0)
a) Lysine
b)Aspartate
c) Glutamate
VERIFIED
A buffer solution is made from a weak acid, HA (pKa 6.0) and its conjugate base A-. What is the ratio of
the base A- to the acid HA at pH 5.0? - pH = pKa + log[A-]/[HA]
5 = 6 + log[A-]/[HA]
-1 = log [A-]/[HA]
10^-1 = ratio
raio = 0.1
Which of these elements is the least common in organic compounds within living cells?
a) C
b) F
c) S
d) N - B- fluoride
If the hydrogen ion
concentration of the blood increases ten-fold, how much does the pH change? - pH decreases one
unit
If the pH changes from 7.0 to 6.0 which amino acid R-group is the most affected?
(Hint: The most affected R-group is the one with a pK the closest to pH 7.0)
a) Lysine
b)Aspartate
c) Glutamate
