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BSC 2010 Ch.9 Questions with Answers (100%
Correct Answers)
What is the oxidizing agent in the following reaction? Pyruvate + NADH +
H+ → Lactate + NAD+ Answer: Pyruvate
Which term describes the degree to which an element attracts electrons?
Answer: Electronegativity
Which terms describe two atoms when they form a bond in which electrons are
completely transferred from one atom to the other? Answer: Anion and cation
Which of the following statements is true of the bonds in a water molecule?
A) The electron in each hydrogen atom is completely transferred to the oxygen
atom, and each hydrogen atom has a net charge of +1.
B) Oxygen acts as the electron acceptor and is oxidized.
C) Oxygen holds electrons more tightly than hydrogen does, and the net charge
is zero.
D) There is equal sharing of the electrons between the oxygen atom and the
two hydrogen atoms, and the net charge is zero. Answer: C) Oxygen holds
electrons more tightly than hydrogen does, and the net charge is zero.
Which of the following statements is not true of most cellular redox reactions?
A) Changes in potential energy can be released as heat.
B) The electron acceptor is reduced.
C) The reactant that is oxidized loses electrons.
D) A hydrogen atom is transferred to the atom that loses an electron. Answer:
D) A hydrogen atom is transferred to the atom that loses an electron.
, 2
What kind of bond is formed when lithium and fluorine combine to form
lithium fluoride? Answer: Ionic
Gaseous hydrogen burns in the presence of oxygen to form water:
2H2 + O2 → 2H2 O + energy
Which molecule is oxidized and what kind of bond is formed? Answer:
Hydrogen, Polar
Which of the following processes is driven by chemiosmosis? Answer:
Oxidative Phosphorylation
Which of the following metabolic processes normally occurs regardless of
whether or not oxygen (O2) is present? Answer: Glycolysis
Which molecule is metabolized in a cell to produce energy "currency" in the
form of ATP? Answer: Glucose
True or false? The potential energy in an ATP molecule is derived mainly from
its three phosphate groups. Answer: True
Which process is not part of the cellular respiration pathway that produces
large amounts of ATP in a cell? Answer: Fermentation
Which step of the cellular respiration pathway can take place in the absence of
oxygen? Answer: Glycolysis
Into which molecule are all the carbon atoms in glucose ultimately
incorporated during cellular respiration? Answer: Carbon Dioxide
Which of the following statements about the electron transport chain is true?
Answer: NADH and FADH2 donate their electrons to the chain.
Which stage of glucose metabolism produces the most ATP? Answer: Electron
transport and chemiosmosis
BSC 2010 Ch.9 Questions with Answers (100%
Correct Answers)
What is the oxidizing agent in the following reaction? Pyruvate + NADH +
H+ → Lactate + NAD+ Answer: Pyruvate
Which term describes the degree to which an element attracts electrons?
Answer: Electronegativity
Which terms describe two atoms when they form a bond in which electrons are
completely transferred from one atom to the other? Answer: Anion and cation
Which of the following statements is true of the bonds in a water molecule?
A) The electron in each hydrogen atom is completely transferred to the oxygen
atom, and each hydrogen atom has a net charge of +1.
B) Oxygen acts as the electron acceptor and is oxidized.
C) Oxygen holds electrons more tightly than hydrogen does, and the net charge
is zero.
D) There is equal sharing of the electrons between the oxygen atom and the
two hydrogen atoms, and the net charge is zero. Answer: C) Oxygen holds
electrons more tightly than hydrogen does, and the net charge is zero.
Which of the following statements is not true of most cellular redox reactions?
A) Changes in potential energy can be released as heat.
B) The electron acceptor is reduced.
C) The reactant that is oxidized loses electrons.
D) A hydrogen atom is transferred to the atom that loses an electron. Answer:
D) A hydrogen atom is transferred to the atom that loses an electron.
, 2
What kind of bond is formed when lithium and fluorine combine to form
lithium fluoride? Answer: Ionic
Gaseous hydrogen burns in the presence of oxygen to form water:
2H2 + O2 → 2H2 O + energy
Which molecule is oxidized and what kind of bond is formed? Answer:
Hydrogen, Polar
Which of the following processes is driven by chemiosmosis? Answer:
Oxidative Phosphorylation
Which of the following metabolic processes normally occurs regardless of
whether or not oxygen (O2) is present? Answer: Glycolysis
Which molecule is metabolized in a cell to produce energy "currency" in the
form of ATP? Answer: Glucose
True or false? The potential energy in an ATP molecule is derived mainly from
its three phosphate groups. Answer: True
Which process is not part of the cellular respiration pathway that produces
large amounts of ATP in a cell? Answer: Fermentation
Which step of the cellular respiration pathway can take place in the absence of
oxygen? Answer: Glycolysis
Into which molecule are all the carbon atoms in glucose ultimately
incorporated during cellular respiration? Answer: Carbon Dioxide
Which of the following statements about the electron transport chain is true?
Answer: NADH and FADH2 donate their electrons to the chain.
Which stage of glucose metabolism produces the most ATP? Answer: Electron
transport and chemiosmosis
