Chapter 7 pre/post quiz.

Where does glycolysis occur in animal cells?

• inner mitochondrial membrane

• cytosol

• mitochondrial matrix

• outer mitochondrial membrane

Which of the following terms describes metabolic pathways that break down complex molecules to release stored energy?

• endergonic pathways

• bioenergetic pathways

• anabolic pathways

• catabolic pathways

Why are carbohydrates and fats considered high-energy foods?

• They have a large number of electrons associated with hydrogen.

• They have many carbon atoms bound together by single covalent bonds.

• They have few nitrogen atom

• They have many oxygen atoms.

Which of the following metabolic pathways generates a proton gradient?

• the citric acid cycle

• glycolysis

• he oxidation of pyruvate to acetyl CoA

• the electron transport chain

• chemiosmosis

Which of the following describes the result of transferring an electron from a less electronegative atom to a more electronegative atom?

• The more electronegative atom is oxidized, and energy is consumed.

• The more electronegative atom is oxidized, and energy is released.

• The more electronegative atom is reduced, and energy is released.

• The more electronegative atom is reduced, and energy is consumed.

In addition to ATP, what are the products of glycolysis?

• CO2 and NADH

• NADH and pyruvate

• CO2 and pyruvate

• H2O, FADH2, and citrate

• CO2 and H2O

Why is glycolysis considered to be one of the first metabolic pathways to have evolved?

• It is found in prokaryotic cells but not in eukaryotic cells.

• It relies on chemiosmosis, which is a metabolic mechanism present only in prokaryotic cells

• It does not involve organelles or specialized structures, does not require oxygen, and is present in most organisms.

• It produces much less ATP than does oxidative phosphorylation.

What is the proton-motive force?

• the energy required to remove an electron from a hydrogen atom

• the energy that moves hydrogen into the intermembrane space

• the energy that moves hydrogen atoms into the mitochondrion

• the energy provided by a transmembrane hydrogen ion gradient

The oxygen consumed during cellular respiration is involved directly in which process or event?

• accepting electrons at the end of the electron transport chain

• glycolysis

• the citric acid cycle

• the phosphorylation of ADP to form ATP

• the oxidation of pyruvate to acetyl CoA

Which of the following metabolic pathways occur(s) in mitochondria?

• glycolysis and oxidation of pyruvate to acetyl CoA

• oxidation of pyruvate to acetyl CoA and the citric acid cycle

• glycolysis and fermentation

• fermentation and chemiosmosis

• fermentation and oxidative phosphorylation