Biochemistry Quiz

What is the rate-limiting enzyme in catecholamine biosynthesis?

• DOPA decarboxylase

• PNMT

• Tyrosine hydroxylase

• COMT

Which vitamin is required for the conversion of dopamine to norepinephrine?

• Vitamin B6

• Vitamin A

• Vitamin C

• Vitamin D

The pancreatic hormone that promotes fuel mobilization is:

• Insulin

• Glucagon

• Somatostatin

• Adiponectin

Which glucose transporter is responsible for glucose uptake in pancreatic β-cells?

• GLUT1

• GLUT2

• GLUT3

• GLUT4

Which hormone has the most potent anabolic effect in the body?

• Glucagon

• Cortisol

• Insulin

• Epinephrine

The primary function of leptin is to:

• Stimulate appetite

• Lower blood glucose

• Suppress appetite

• Promote glucagon secretion

Which hormone is secreted by the α-cells of the pancreas?

• Insulin

• Glucagon

• Somatostatin

• Leptin

GIP and GLP-1 are classified as:

• Pancreatic enzymes

• Incretins

• Steroid hormones

• Adrenal hormones

Which enzyme degrades GLP-1 and GIP?

• Amylase

• DPP-4

• COMT

• Lipase

Which hormone increases blood glucose by activating adenylate cyclase and cAMP in liver?

• Insulin

• Glucagon

• Leptin

• Melatonin