Biochemistry - MCQ Practice Questions

The Maillard reaction occurs between reducing sugars and amino acids, leading to the formation of:

In hyperglycemia, excess glucose undergoes polyol pathway conversion. Which enzyme catalyzes the first step?

Which of the following is a branching enzyme in glycogen synthesis?

Cori cycle involves recycling of lactate from muscles to liver. Which enzyme is key in converting lactate back to glucose in the liver?

The anomeric carbon in glucose is:

HbA1c levels are used to monitor long-term glycemic control because glucose binds to hemoglobin through:

Cellulose differs from starch in that it contains:

In the pentose phosphate pathway, the oxidative phase primarily generates:

In diabetes mellitus type 2, impaired fasting glucose (100-125 mg/dL) is associated with:

Which of the following statements is TRUE about the Cori cycle?

A patient presents with lactic acidosis after consuming alcohol. Which enzyme's inhibition by acetaldehyde is primarily responsible for this condition?

Which monosaccharide is the primary carbon source for synthesis of heparin and other glycosaminoglycans?

In the pentose phosphate pathway, which intermediate can directly feed into glycolysis as glyceraldehyde-3-phosphate?

Which enzyme deficiency causes Essential Fructosuria, and why is it clinically benign?

Which carbohydrate metabolism enzyme is allosterically inhibited by citrate and ATP but activated by AMP and ADP?

In the glucose transporter classification, which GLUT protein is responsible for INSULIN-DEPENDENT glucose uptake in muscle and adipose tissue?

During starvation lasting 3-5 days, what is the PRIMARY source of glucose for the brain and RBCs?

In the non-oxidative phase of the pentose phosphate pathway, transketolase requires which cofactor?

Which enzyme catalyzes the first committed step of glycolysis and is inhibited by its end products ATP and citrate?

The Cori cycle operates between muscle and liver. Which of the following correctly describes the fate of lactate in the liver?