Question

multiple-choice question
what links together the amino acids?
□ hydrogen bond
□ nucleotide bond
□ rna bond
□ peptide bond

Explanation:

To determine what links amino acids, we analyze each option:

• Hydrogen bonds are weak bonds (e.g., in protein secondary structure), not for linking amino acids into chains.
• Nucleotide bonds link nucleotides (for DNA/RNA), not amino acids.
• "RNA bond" is not a standard term for linking amino acids.
• Peptide bonds form between the carboxyl group of one amino acid and the amino group of another, creating polypeptide chains (proteins).

Answer:

peptide bond (the option with "peptide bond" – note: since the original options’ checkboxes are empty, the correct choice is the one labeled "peptide bond" among the four, typically the last option here).