Chapter 22. Chapter 22

Problem-Solving Video Assessment

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Chapter 22 Problem-Solving Video Assessment

(Questions 1 & 2) Assume that you have an in vitro system for synthesizing fatty acids using the radioactive acetyl CoA shown below:

1.

What will be the ¹⁴C:³H ratio after the synthesis of lauric acid (C₁₂) using this system?

0.33

0.75

0.78

1.29

1.33

_feedback_correct: Correct. _feedback_incorrect: Incorrect.

2.

You add unlabeled propionyl CoA, a three-carbon molecule, to your system. Odd-chain fatty acids are synthesized using propionyl CoA as the initial starting molecule that condenses with malonyl CoA. What will be the ³H:¹⁴C ratio after the synthesis of the odd-chain fatty acid tridecylic acid (C₁₃) in this scenario?

0.75

1.00

1.33

3.00

No radioactivity will be incorporated into tridecylic acid.

_feedback_correct: Correct. _feedback_incorrect: Incorrect.

3.

Assume that you have an in vitro system for synthesizing fatty acids using the radioactive acetyl CoA shown below:

How many radioactive carbons will be incorporated into myristic acid (C₁₄) after it is synthesized using this system?

2 carbons

6 carbons

7 carbons

12 carbons

14 carbons

_feedback_correct: Correct. _feedback_incorrect: Incorrect.

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Chapter 22. Chapter 22

Introduction

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