Which of the following is a product of glycolysis?
Lactate
Carbon dioxide
Pyruvate
Acetyl-CoA
The Correct Answer is C
A. Lactate is produced during anaerobic metabolism (when oxygen is scarce) as a byproduct of glycolysis, but it is not the direct product of glycolysis itself.
B. Carbon dioxide is a byproduct of cellular respiration, specifically during the Krebs cycle, not glycolysis.
C. Pyruvate is the end product of glycolysis, where glucose is broken down into two molecules of pyruvate.
D. Acetyl-CoA is formed from pyruvate during the transition step before the Krebs cycle, not directly from glycolysis.
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Correct Answer is C
Explanation
A. The small intestine absorbs lipids but does not produce HDL (high-density lipoprotein).
B. The pancreas produces enzymes and hormones, but it does not produce HDL.
C. The liver is the primary organ responsible for the synthesis of HDL. HDL is involved in reverse cholesterol transport, carrying cholesterol from tissues back to the liver.
D. The gallbladder stores and concentrates bile but does not produce HDL.
Correct Answer is C
Explanation
A. Fundus is the upper part of the stomach, which does not regulate the flow of contents to the duodenum.
B. Gastric rugae are folds in the stomach lining that allow for expansion but do not regulate the flow of contents to the duodenum.
C. Pyloric sphincter controls the flow of partially digested food (chyme) from the stomach into the duodenum.
D. Antrum is the lower portion of the stomach that helps in mixing and grinding food but does not directly regulate its flow to the duodenum.