Overview of Glycolysis Process
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Questions and Answers

What is the main function of glycolysis?

  • Convert glucose to pyruvate and ATP (correct)
  • Prevent movement of substrates through enzymes
  • Produce toxic intermediates
  • Generate 4 ATP

Which enzyme is responsible for transferring a phosphoryl group from ATP to glucose?

  • Hexokinase (correct)
  • Isomerase
  • Phosphorylase
  • Kinase

In glycolysis, what is the compound that can be cleaved into two phosphorylated 3-carbon molecules?

  • Glyceraldehyde 3-phosphate
  • Fructose 1,6-bisphosphate (correct)
  • Glucose 6-phosphate
  • Dihydroxyacetone phosphate

Which stage of glycolysis involves the trapping and preparation phase?

<p>Stage 1 (C)</p> Signup and view all the answers

What is the net yield of ATP in glycolysis?

<p>2 ATP (D)</p> Signup and view all the answers

Which enzyme helps in the conversion of glucose to fructose 1,6-bisphosphate in glycolysis?

<p>Phosphofructokinase (C)</p> Signup and view all the answers

What is the function of substrate channeling in glycolysis?

<p>Ensures movement of substrates and products through enzymes (D)</p> Signup and view all the answers

Which part of glycolysis involves ATP harvesting?

<p>Stage 2 (D)</p> Signup and view all the answers

Which enzyme catalyzes the conversion of galactose 1-phosphate to UDP-galactose?

<p>Galactose 1-phosphate uridyl transferase (B)</p> Signup and view all the answers

What is the role of UDP-galactose 4-epimerase in the pathway?

<p>Converts UDP-galactose to UDP-glucose (C)</p> Signup and view all the answers

Which of the following statements about glucose 1-phosphate is correct?

<p>It is converted to glucose 6-phosphate by phosphoglucomutase (A)</p> Signup and view all the answers

Which enzyme in glycolysis is regulated by allosteric effectors or covalent modification, serving as a control point?

<p>Hexokinase (C)</p> Signup and view all the answers

In muscle cells, how is glycolysis primarily regulated?

<p>By allosteric regulation of phosphofructokinase by ATP and AMP (A)</p> Signup and view all the answers

Which statement about hexokinase in muscle cells is correct?

<p>It is inhibited by glucose 6-phosphate (A)</p> Signup and view all the answers

Which of the following statements about glucose metabolism in the liver is true?

<p>Glucose metabolism in the liver is highly versatile, involving various processes (D)</p> Signup and view all the answers

How is phosphofructokinase in the liver regulated?

<p>By allosteric regulation by citrate and fructose 2,6-bisphosphate (D)</p> Signup and view all the answers

What is a key feature of glucokinase in the liver, unlike hexokinase?

<p>It has a high affinity for glucose and is not inhibited by glucose 6-phosphate (C)</p> Signup and view all the answers

Which of the following statements about gluconeogenesis is correct?

<p>It is regulated by fructose 1,6-bisphosphatase and glucose 6-phosphatase (D)</p> Signup and view all the answers

What is the role of phosphoglucose isomerase in glycolysis?

<p>It converts glucose 6-phosphate to fructose 6-phosphate (B)</p> Signup and view all the answers

Which enzyme catalyzes the irreversible reaction of fructose 6-phosphate to fructose 1,6-bisphosphate?

<p>Phosphofructokinase (PFK) (D)</p> Signup and view all the answers

Which enzyme catalyzes the oxidation-reduction reaction of glyceraldehyde 3-phosphate to 1,3-bisphosphoglycerate in stage 2 of glycolysis?

<p>Glyceraldehyde 3-phosphate dehydrogenase (C)</p> Signup and view all the answers

What is the role of phosphoglycerate kinase in glycolysis?

<p>It catalyzes the formation of ATP by transferring a phosphoryl group from 1,3-bisphosphoglycerate to ADP (B)</p> Signup and view all the answers

What is the net reaction of the conversion of glucose to pyruvate in glycolysis?

<p>Glucose + 2 Pi + 2 ADP + 2 NAD+ 2 pyruvate + 2 ATP + 2 NADH + 2 H+ + H2O (B)</p> Signup and view all the answers

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