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

4. Protein Structure

Peptide Bond

Biochemistry

4. Protein Structure

Peptide Bond

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Multiple Choice

Which molecule acts as an enzyme during the formation of peptide bonds between amino acids?

Transfer RNA (tRNA)

Messenger RNA (mRNA)

DNA polymerase

Ribosomal RNA (rRNA)

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Verified step by step guidance

Understand the context: Peptide bond formation occurs during protein synthesis, specifically in the ribosome, where amino acids are joined together to form a polypeptide chain.

Recall the role of ribosomal RNA (rRNA): rRNA is a structural and functional component of the ribosome. It plays a catalytic role in the formation of peptide bonds, acting as a ribozyme (an RNA molecule with enzymatic activity).

Eliminate incorrect options: Transfer RNA (tRNA) is involved in bringing amino acids to the ribosome, but it does not catalyze peptide bond formation. Messenger RNA (mRNA) provides the template for translation but does not have enzymatic activity. DNA polymerase is involved in DNA replication, not protein synthesis.

Focus on the correct answer: Ribosomal RNA (rRNA) is the molecule that catalyzes the formation of peptide bonds between amino acids during translation. Specifically, the peptidyl transferase activity is associated with the large subunit of the ribosome.

Conclude: The correct answer is ribosomal RNA (rRNA), as it acts as an enzyme during the formation of peptide bonds between amino acids in the ribosome.