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BIOC 3021 Practice Exam 1 Questions And
Answers (Guaranteed A+)
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? - answer✔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 - answer✔B- fluoride
If the hydrogen ion
concentration of the blood increases ten-fold, how much does the pH change? - answer✔pH
decreases one unit
If the pH changes from 7.0 to 6.0 which amino acid R-group is the most affected?
1|Page
ALL RIGHTS RESERVED.
BIOC 3021 Practice Exam 1 Questions And
Answers (Guaranteed A+)
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? - answer✔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 - answer✔B- fluoride
If the hydrogen ion
concentration of the blood increases ten-fold, how much does the pH change? - answer✔pH
decreases one unit
If the pH changes from 7.0 to 6.0 which amino acid R-group is the most affected?
1|Page
