Mcqs
What is the Cori cycle?
A) A biochemical pathway in which glucose is converted to
glycogen
B) A biochemical pathway in which lactate is converted to
pyruvate
C) A biochemical pathway in which lactate is transported
from muscle to the liver and converted to glucose
D) A biochemical pathway in which glucose is converted to
pyruvate
Answer: C
Which one is true
about the Cori cycle?
A) It occurs exclusively in muscle cells
B) It occurs exclusively in liver cells
C) It occurs in both muscle and liver cells
D) It occurs in red blood cells
Answer: C
What is the primary function of the Cori cycle?
A) To provide energy for muscle contraction
B) To transport lactate to the liver
C) To convert lactate to pyruvate
D) To convert pyruvate to lactate
Answer: B
What is the fate of lactate in the liver during the Cori
cycle?
A) It is converted to glucose
B) It is converted to pyruvate
C) It is converted to glycogen
D) It is excreted in the urine
Answer: A
Which enzyme is responsible for converting lactate to
pyruvate in the liver during the Cori cycle?
A) Lactate dehydrogenase
B) Pyruvate dehydrogenase
C) Alanine transaminase
D) Gluconeogenesis
Answer: A
What is the energy yield of the Cori cycle?
A) 2 ATP molecules
B) 4 ATP molecules
C) 6 ATP molecules
D) 8 ATP molecules
Answer: A
During exercise, what is the source of lactate that is
transported to the liver during the Cori cycle?
A) Muscle glycogen
B) Blood glucose
C) Dietary carbohydrate
D) Blood lipids
Answer: A
What is the role of the Cori cycle in gluconeogenesis?
A) It provides lactate as a substrate for gluconeogenesis
B) It provides pyruvate as a substrate for gluconeogenesis
C) It provides ATP for gluconeogenesis
D) It provides glucose for gluconeogenesis
Answer: A
Which hormone stimulates the Cori cycle?
A) Insulin
B) Glucagon
C) Adrenaline
D) Thyroxine
Answer: C
What effect does high-intensity exercise have on the Cori
cycle?
A) It increases the rate of lactate production and transport
to the liver
B) It decreases the rate of lactate production and transport
to the liver
C) It has no effect on the Cori cycle
D) It results in the accumulation of lactate in the muscle
Answer: A
Which of the following is a consequence of the Cori cycle?
A) Increased blood glucose levels
B) Increased blood lactate levels
C) Increased blood pyruvate levels
D) Increased blood glycogen levels
Answer: A
What is the role of lactate dehydrogenase in the Cori cycle?
A) To convert lactate to pyruvate in the liver
B) To convert pyruvate to lactate in the muscle
C) To convert glucose to glycogen in the liver
D) To convert glycogen to glucose in the muscle
Answer: B
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