Chapter 3, Problem 4SC

With regard to enzymes, why are vitamins and minerals necessary for good health? Give examples.

The hormone insulin enhances the transport of glucose (sugar) from the blood into most body cells. Its secretion is controlled by a negative-feedback system between the concentration of glucose in the blood and the insulin-secreting cells. Therefore, which of the following statements is correct? A decrease in blood glucose concentration stimulates insulin secretion, which in turn further towers blood glucose concentration. An increase in blood glucose concentration stimulates insulin secretion, which in turn lowers blood glucose concentration. A decrease in blood glucose concentration stimulates insulin secretion, which in turn increases blood glucose concentration. An increase in blood glucose concentration stimulates insulin secretion, which in turn further increases blood glucose concentration. None of the preceding is correct.

Which molecule does not form during glycolysis? a. NADH c. oxygen (O2) b. pyruvate d. ATP

The cholesterol synthesized by cells uses which component of the glycolytic pathway as a starting point? a. glucose b. acetyl CoA c. pyruvate d. carbon dioxide

Dixie Bee wanted to make JELL-O shots for her next party, but felt guilty about encouraging her guests to consume alcohol. She tried to compensate for the toxicity of the alcohol by adding pieces of healthy fresh pineapple to the shots, but when she did, the JELL-O never solidified. What happened? Hint: JELL-O is mainly sugar and a gelatinous mixture of proteins.

Basal metabolic rate is a measure of ______. a. the total amount of calories you burn in 24 hours b. the amount of food energy needed to sustain basic body operations c. the amount of energy burned by skeletal muscle in a given period d. both a and b

The energy currency used by cells is _____. a. ATP b. ADP c. AMP d. adenosine

_________ is a monosaccharide. a. Glucose b. Sucrose c. Ribose d. Starch e. a and c f. a, b, and c

Cellulose and starch are examples of______. a. monosaccharides b. disaccharides c. lipids d. polysaccharides