Question 1

Which type of bond is formed between two amino acids during protein synthesis as a result of a dehydration reaction?

Accepted Answer

Peptide bond

Question 2

A mutation causes the substitution of valine for glutamic acid in the beta chain of hemoglobin. What is the most likely consequence of this change?

Accepted Answer

Altered protein structure and function, potentially leading to sickle cell disease

Question 3

Which of the following best describes the primary structure of a protein?

Accepted Answer

The sequence of amino acids in the polypeptide chain

Question 4

Which level of protein structure is directly affected by hydrogen bonding between backbone atoms, resulting in alpha helices and beta sheets?

Accepted Answer

Secondary structure

Question 5

A protein is exposed to high temperature and extreme pH. What is the most likely outcome?

Accepted Answer

The protein will denature, losing its functional shape

Question 6

Which of the following is a function of transport proteins?

Accepted Answer

Transporting oxygen in blood via hemoglobin

Question 7

What is the monomer unit of a polysaccharide, and what type of bond links these monomers?

Accepted Answer

Monosaccharide; glycosidic linkage

Question 8

Which component of an amino acid varies among different amino acids and determines their unique properties?

Accepted Answer

R group (side chain)

Question 9

A protein consists of multiple polypeptide subunits. Which level of protein structure does this represent?

Accepted Answer

Quaternary structure

Question 10

Which of the following amino acids is most likely to disrupt an alpha helix due to its rigid structure?

Accepted Answer

Proline

Question 11

Which type of protein is responsible for the selective acceleration of chemical reactions in biological systems?

Accepted Answer

Enzymatic proteins

Question 12

A patient is diagnosed with familial transthyretin amyloidosis, which involves abnormal protein aggregation. Which level of protein structure is most directly affected in this disease?

Accepted Answer

Quaternary structure

Question 13

Which of the following best explains why a change in a single amino acid in a protein can drastically affect its function?

Accepted Answer

It alters the protein's primary structure, which can change folding and function

Question 14

Which of the following is NOT a function of proteins?

Accepted Answer

Storing genetic information

Question 15

Which type of interaction is primarily responsible for stabilizing the tertiary structure of a protein?

Accepted Answer

Interactions between R groups, including hydrophobic interactions, ionic bonds, and disulfide bridges

Question 16

Which protein is responsible for storing amino acids in egg whites for developing embryos?

Accepted Answer

Ovalbumin

Question 17

Which of the following statements about globular and fibrous proteins is correct?

Accepted Answer

Fibrous proteins provide structural support and are less sensitive to heat and pH changes

Question 18

Which of the following amino acids has a hydrophobic side chain?

Accepted Answer

Valine

Question 19

Which protein is responsible for the movement of cilia and flagella?

Accepted Answer

Motor proteins

Question 20

Which of the following best describes the central dogma of biology as it relates to protein structure?

Accepted Answer

DNA is transcribed into RNA, which is then translated into protein

Protein Structure and Function: Cellular Foundations of Life (BIO 104, Chapter 5)

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