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Biochemistry WGU c785 Questions and Answers
100% Correct
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 - ANSWER 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
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3. Ribose
4. Sucrose - ANSWER 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 - ANSWER 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 the small intestine has an optimal pH of 8
while pepsin, which acts in the more acidic milieu of the
stomach, has an optimal pH of 2.
A catabolic enzyme:
Biochemistry WGU c785 Questions and Answers
100% Correct
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 - ANSWER 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
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3. Ribose
4. Sucrose - ANSWER 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 - ANSWER 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 the small intestine has an optimal pH of 8
while pepsin, which acts in the more acidic milieu of the
stomach, has an optimal pH of 2.
A catabolic enzyme:
