Table of contents

1. Introduction to Biochemistry4h 34m
2. Water3h 23m
3. Amino Acids8h 10m
4. Protein Structure10h 4m
5. Protein Techniques14h 5m
6. Enzymes and Enzyme Kinetics13h 38m
7. Enzyme Inhibition and Regulation 8h 42m
8. Protein Function 9h 41m
9. Carbohydrates7h 49m
10. Lipids5h 49m
11. Biological Membranes and Transport 6h 37m
12. Biosignaling9h 45m
Review 1: Nucleic Acids, Lipids, & Membranes2h 47m
Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway3h 12m
Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism2h 26m
Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation1h 48m

1. Introduction to Biochemistry

Characteristics of Life

Biochemistry

1. Introduction to Biochemistry

Characteristics of Life

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Multiple Choice

Which of the following statements about trans fatty acids is true?

Trans fatty acids have at least one double bond in the trans configuration, which causes the hydrocarbon chain to remain relatively straight.

Trans fatty acids increase the fluidity of cell membranes more than cis fatty acids.

Trans fatty acids are produced exclusively by enzymatic processes in animal cells.

Trans fatty acids are naturally abundant in most fruits and vegetables.

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Verified step by step guidance

Step 1: Understand the structure of trans fatty acids. Trans fatty acids are unsaturated fatty acids that contain at least one double bond in the trans configuration. This configuration causes the hydrocarbon chain to remain relatively straight, unlike cis fatty acids, which have a bent structure due to the cis configuration of the double bond.

Step 2: Analyze the first statement: 'Trans fatty acids have at least one double bond in the trans configuration, which causes the hydrocarbon chain to remain relatively straight.' This statement is consistent with the structural properties of trans fatty acids and is likely true.

Step 3: Evaluate the second statement: 'Trans fatty acids increase the fluidity of cell membranes more than cis fatty acids.' This is incorrect because the straight structure of trans fatty acids reduces membrane fluidity compared to the bent structure of cis fatty acids.

Step 4: Assess the third statement: 'Trans fatty acids are produced exclusively by enzymatic processes in animal cells.' This is false because trans fatty acids are primarily produced through industrial processes like partial hydrogenation of vegetable oils, and they are not exclusively produced by enzymatic processes in animal cells.

Step 5: Examine the fourth statement: 'Trans fatty acids are naturally abundant in most fruits and vegetables.' This is incorrect because trans fatty acids are not naturally abundant in fruits and vegetables; they are found in small amounts in some animal products and are largely produced industrially.