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

6. Enzymes and Enzyme Kinetics

Optimal Enzyme Conditions

Biochemistry

6. Enzymes and Enzyme Kinetics

Optimal Enzyme Conditions

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Multiple Choice

Enzymes in human cells tend to perform best under which of the following conditions?

At a temperature of 25^a0\mathrm{^b0C} and pH 2

At a temperature of 100^a0\mathrm{^b0C} and highly basic pH

At a temperature of 0^a0\mathrm{^b0C} and highly acidic pH

At a temperature of approximately 37^a0\mathrm{^b0C} and near-neutral pH

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Verified step by step guidance

Understand the optimal conditions for enzyme activity in human cells. Enzymes are proteins that catalyze biochemical reactions, and their activity is highly dependent on environmental factors such as temperature and pH.

Recognize that human enzymes are adapted to function within the physiological conditions of the human body. The average internal body temperature is approximately 37°C, which is the optimal temperature for most human enzymes.

Consider the pH environment. Most human enzymes perform best at a near-neutral pH, which is around pH 7. This is because the majority of biochemical processes occur in environments like the cytoplasm or blood, which are near-neutral in pH.

Eliminate the incorrect options based on the physiological conditions of the human body. Temperatures like 25°C or 0°C are too low for optimal enzyme activity, while 100°C is too high and would denature most enzymes. Similarly, highly acidic or highly basic pH values are not conducive to enzyme stability and function in human cells.

Conclude that the correct answer is: At a temperature of approximately 37°C and near-neutral pH, as these conditions align with the natural environment of human cells and support optimal enzyme activity.