Question

Consider a scenario where a person eats a cupcake composed of glucose molecules. The person has digested the cupcake, and the glucose has been absorbed into the bloodstream. Based on this information and your knowledge about biology, select true or false for each of the following statements.
a. Some of the energy stored in glucose will eventually be transformed into heat.
b. Carbon atoms from glucose could be exhaled by the person as carbon dioxide.
c. Carbon atoms from glucose could later be found in a plant cell.
d. Carbon atoms from glucose could be converted into oxygen during metabolism.

Answer 1

Answer: a.b.c-true.

              d-false.

a. Some of the energy stored in glucose will eventually be transformed into heat.

This is through  the process of Glycolysis (and Krebs's cycle )where the Carbon atoms in the glucose(substrate level phosphorylation) undergo metabolism with the liberation of ATPs as  heat during  metabolisms. The glucose serves as the substrate for the generation of heat.However,largest amount of ATP's  is expended as heat during oxidative phosphorylation,due to the glucose used as substrate in preceding stages of glycolysis and Kreb Cycle.

b. Carbon atoms from glucose could be exhaled by the person as carbon dioxide.

Yes, this is through glycoylsis and kreb's Cycle where  CO2 is given off as during metabolisms as one compound change from one form to another.E.g from Citric acid(6C) to Succinate(5C),some Carbon atoms are lost as C02. Like during glycolysis.

C. Carbon atoms from glucose could later be found in a plant cell.Yes this is because  the CO2 expired  by human could be trapped by green plants and react with water in the presence of sunlight trapped by chlorophyll to form carbohydrate in plants.This is photosynthesis.

Explanation:

Carbon can't not be converted to oxygen,big FALSE.