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BIOC 3021 Practice Exam 1 Questions and Answers 100% Solved | Graded A+ $8.49
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BIOC 3021 Practice Exam 1 Questions and Answers 100% Solved | Graded A+

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BIOC 3021 Practice Exam 1 Questions and Answers 100% Solved | Graded 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? - pH = pKa + log[A-]/[HA] 5 = 6 + log[A-]/[HA] -1 = log [A-]/[HA] 10^-1 = rat...

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  • December 7, 2024
  • 6
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • BIOC 3021
  • BIOC 3021
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BIOC 3021 Practice Exam 1 Questions

and Answers 100% Solved | Graded 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? - ✔✔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
1
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

, 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

d) Histidine

e) Arginine - ✔✔Histidine: pK=6



lysine(pK=10.5), arginine (pK=12.5)

aspartate (pK=3.9), glutamate (pK=4.3)

Which amino acid is essentially incompatible with alpha helix and beta

sheet formation? - ✔✔Proline


2
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

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