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

3. Amino Acids

Amino Acid Groups

Biochemistry

3. Amino Acids

Amino Acid Groups

Previous problemNext problem

Struggling with Biochemistry?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

How many different standard amino acids are incorporated into proteins during translation in humans?

Previous problemNext problem

Verified step by step guidance

Understand the context of the question: Translation is the process by which ribosomes synthesize proteins using mRNA as a template. Proteins are composed of amino acids, which are the building blocks of these macromolecules.

Recall that standard amino acids are the 20 amino acids encoded directly by the genetic code and incorporated into proteins during translation. These amino acids are universal across most organisms, including humans.

Note that while there are additional amino acids like selenocysteine and pyrrolysine, they are considered non-standard because they require special mechanisms for incorporation and are not universally encoded by the genetic code.

Eliminate the incorrect options: 21 and 22 refer to the inclusion of non-standard amino acids, which are not part of the standard set. 18 is incorrect because it excludes some of the standard amino acids.

Conclude that the correct answer is 20, as these are the standard amino acids incorporated into proteins during translation in humans.