Question

1. draw a rectangle around two different r groups on the amino acids in the secondary structure in model 2. 13. is there any interaction between r groups in the secondary structure in model 2? protein structure what are the levels of protein structure and what role do functional groups play? why? proteins accomplish many cellular tasks such as facilitating chemical reactions, providing structure, and carrying information from one cell to another. how a protein chain coils up and folds determines its three - dimensional shape. its shape will, in turn, determine how it interacts with other molecules and thus performs its function in the cell. model 1 - formation of a peptide bond amino acid 1 amino acid 2 dipeptide

Explanation:

Step1: Identify R - groups in amino - acids

In amino - acids, the R - group is the side - chain. In the given context, for amino acid 1, the R - group is $CH_2OH$ and for amino acid 2, the R - group is $CH_3$. When looking at the secondary structure in Model 2 (not shown here but in the context), one would visually identify two different R - groups and draw a rectangle around them.

Step2: Determine R - group interactions in secondary structure

In secondary structure, common interactions include hydrogen bonding. R - groups may or may not interact directly in secondary structure. In typical secondary structures like alpha - helices and beta - sheets, the main interactions are between backbone atoms (N - H and C=O). However, some R - groups can influence the stability of secondary structure through hydrophobic or hydrophilic interactions. But generally, direct R - group - to - R - group interactions are not the primary force in secondary structure formation. So, usually the answer is no.

Answer:

1. (You need to draw based on the actual Model 2. If we assume the above - mentioned amino acids, you can draw rectangles around $CH_2OH$ and $CH_3$ if they are in Model 2)
2. No