Chapter 6 Reading Quiz

The process of glycolysis occurs in the _____. Select one: a. smooth endoplasmic reticulum b. plasma membrane c. mitochondria of eukaryotic cells, and cytoplasm of prokaryotic cells d. mitochondria e. cytoplasm

e. cytoplasm

In glycolysis, two molecules of pyruvate are produced. As cellular respiration continues, a number of products are produced, including _____. Select one: a. glucose b. ATP c. CO2 d. O2 e. B and C

e. B and C

34% of the energy stored in glucose is captured in cellular respiration as ATP. What happens to the rest of the energy? Select one: a. Scientists are puzzled by this conundrum to this very day. b. It magically disappeared. c. It is removed as waste materials. d. It is stored as fat. e. It is released as heat.

e. It is released as heat.

Cellular respiration takes place in the nucleus of all eukaryotic cells. Select one: True False

False

What is the ultimate fate of the electrons that are stripped from glucose during cellular respiration? Select one: a. They are used to form water. b. They are used to oxidize oxygen. c. They are used to form ATP by chemiosmosis. d. They are donated to NADH. e. They result in the formation of heat.

a. They are used to form water.

A muscle cell deprived of molecular oxygen will convert glucose to lactic acid to _____. Select one: a. gain energy through chemiosmosis b. recycle NADH through fermentation c. recycle NADH and FADH2 through the electron transport chain d. continue with cellular respiration e. to transition into the citric acid cycle

b. recycle NADH through fermentation

What is the purpose of embedding the electron transport chain in the membrane of an organism? Select one: a. Hydrogen ions (H+) are the only substances that can be pumped across this membrane. b. It doesn't have to be, as some organisms don't have an electron transport chain. c. The citric acid cycle can be compartmentalized from glycolysis. d. The membrane is impermeable to H+. e. NADH can donate electrons to an electron carrier.

d. The membrane is impermeable to H+.

Primarily, cellular respiration serves to _____. Select one: a. produce cell structures from chemical building blocks b. make food c. break down ATP, so that ADP and P can be reused d. make ATP to power the cell's activities e. break down toxic molecules

d. make ATP to power the cell's activities

Fat is the most efficient molecule for long-term energy storage even compared to carbohydrates because _____. Select one: a. fats can directly enter the electron transport chain, the phase of respiration that produces the most ATP b. when compacted, fat occupies less volume than an equivalent amount of carbohydrate c. compared to carbohydrates, fat produces fewer toxic by-products when it's metabolized d. with their numerous hydrogen atoms, fats provide an abundant source of high-energy electrons

d. with their numerous hydrogen atoms, fats provide an abundant source of high-energy electrons