Help with this please Which of the following is a peptide bond?

A. C-H bond
B. N-H bond
C. C-C bond
D. C-N bond

The correct answer is - D.C-N bond

Explanation:

A chemical bond is formed between the carboxyl group of an amino acid to the amino group of the other amino acid and release a water molecule. It is a dehydration synthesis reaction.

So, the peptide bond normally formed by the reaction between amino acid from C1 of one amino acid molecule and N2 of the other amino acid molecule.

So the peptide bond that formed by this reaction is involve bonding of C-N bond.

the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.