Biochemistry WGU c785 Questions and
Top Explained Answers
, Nonenzymatic glycosylation or glycation creates glycoproteins by:
1. Chemical addition of sugars to polypeptides
2. Extracellular synthesis
3. Attaching 20 amino acids
4. Secretion into extracellular matrix - CORRECT ANS:1
Nonenzymatic glycosylation or glycation creates glycoproteins by the chemical addition of sugars to
polypeptides. Since this type of glycosylation is nonenzymatic, the time and the concentration of sugar
control glycosylation. Because people with higher circulating levels of glucose have higher levels of
nonenzymatic glycosylation, measurement of the glycosylated hemoglobin A1c is a diagnostic test used
to monitor blood sugar levels in persons with diabetes.
Which of the following is a 5-carbon sugar?
1. Glucose
2. Fructose
3. Ribose
4. Sucrose - CORRECT ANS:3
Ribose is a pentose, a simple sugar (monosaccharide) that has five carbon atoms per molecule. It is
synthesized in the body and obtained in small amounts from consumption of ripe fruits and vegetables.
Ribose serves as an energy substrate for the resynthesis of ATP and is a key component of ribonucleic
acid (RNA). Deoxyribose, a component of DNA, also is a pentose.
The optimum pH of pepsin is:
1. 5
2. 7.1
3. 8.1
4. 2 - CORRECT ANS:4
The optimum pH for enzymes varies for different enzymes and even enzymes with similar actions may
have different optimal pH based on where they act. For example, trypsin, a digestive enzyme that acts in
Top Explained Answers
, Nonenzymatic glycosylation or glycation creates glycoproteins by:
1. Chemical addition of sugars to polypeptides
2. Extracellular synthesis
3. Attaching 20 amino acids
4. Secretion into extracellular matrix - CORRECT ANS:1
Nonenzymatic glycosylation or glycation creates glycoproteins by the chemical addition of sugars to
polypeptides. Since this type of glycosylation is nonenzymatic, the time and the concentration of sugar
control glycosylation. Because people with higher circulating levels of glucose have higher levels of
nonenzymatic glycosylation, measurement of the glycosylated hemoglobin A1c is a diagnostic test used
to monitor blood sugar levels in persons with diabetes.
Which of the following is a 5-carbon sugar?
1. Glucose
2. Fructose
3. Ribose
4. Sucrose - CORRECT ANS:3
Ribose is a pentose, a simple sugar (monosaccharide) that has five carbon atoms per molecule. It is
synthesized in the body and obtained in small amounts from consumption of ripe fruits and vegetables.
Ribose serves as an energy substrate for the resynthesis of ATP and is a key component of ribonucleic
acid (RNA). Deoxyribose, a component of DNA, also is a pentose.
The optimum pH of pepsin is:
1. 5
2. 7.1
3. 8.1
4. 2 - CORRECT ANS:4
The optimum pH for enzymes varies for different enzymes and even enzymes with similar actions may
have different optimal pH based on where they act. For example, trypsin, a digestive enzyme that acts in
