Where do peptide bonds form? Between adjacent amino groups on amino acids. Betwe

Question

Where do peptide bonds form?

Between adjacent amino groups on amino acids.

Between amino acids of two different protein chains.

Between the carboxyl group of one amino acid and the amino group of another amino acid.

Between adjacent carboxyl groups on amino acids.

Question 2

Select one answer.

10 points

Amino acids in a protein chain are attached by bonds called ____________.

carboxyl bonds

amino bonds

peptide bonds

protein bonds

Question 3

Select one answer.

10 points

The amino acid valine is shown with its sidechain atoms highlighted in yellow. Do you think this amino acid is hydrophilic or hydrophobic?

hydrophobic (non-polar)

hydrophilic (polar)

Question 4

Select one answer.

10 points

The sequence and folded form of three different proteins are shown below. Although the sequences are different, the folded structures are the same (S shaped).

Which of the following three structures will be the least stable (white=polar sidechains, black=non-polar sidechains).

protein A

protein B

protein C

Question 5

Select one answer.

10 points

The following shows the dipeptide alanine-serine. Four atoms are labeled. Which atom is part of the peptide bond that joins the two amino acids?

Atom A

Atom B

Atom C

Atom D

Question 6

Select one answer.

10 points

Which of the following is the correct result after adding the amino acid serine to a dipeptide made of two alanine residues?

Question 7

Select one answer.

10 points

The peptide bond that forms between two amino acids is an example of a(n):

ionic bond

hydrogen bond

covalent bond

Question 8

Select one answer.

10 points

Which of the following curves best represents the activity of an enzyme isolated from a bacteria that lives in the hot springs in Yellowstone (water temperature 120 degrees C)?

curve A

curve B

curve C

Question 9

Select one answer.

10 points

Which of the following plots more correctly shows the activity of pepsin as a function of pH?

plot A

plot B

plot C

plot D

Question 10

Select one answer.

10 points

Two enzymes catalyze the same reaction. Enzyme A converts substrate to product twice as fast as enzyme B. Which enzyme has the lower activation energy or energy barrier: A or B?

Enzyme A

Enzyme B

Explanation / Answer

Answer 1 c) Between the carboxyl group of one amino acid and the amino group of another amino acid.

Reason - Peptide bond is a bond between two amino acids linked in a polypeptide chain. this bond is formed between the amino group of one amino acid and the carboxyl group of another amino acid. this is known as condensation reaction which results in the release of one water molecule for each peptide bond formation.

Answer 2 c) peptide bond

Reason - as stated already that the Peptide bond is a bond between two amino acids linked in a polypeptide chain. this bond is formed between the amino group of one amino acid and the carboxyl group of another amino acid. this is also called as a condenstaion reaction which results in the release of one water molecule for each peptide bond formation.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.