BSC 2010 Ch.9 Exam Questions Correctly Answered.
What is the oxidizing agent in the following reaction? Pyruvate + NADH + H+ → Lactate + NAD+ - CORRECT ANSWER Pyruvate
Which term describes the degree to which an element attracts electrons? - CORRECT ANSWER Electronegativity
Which terms...
What is the oxidizing agent in the following reaction? Pyruvate + NADH + H+ → Lactate + NAD+ -
CORRECT ANSWER Pyruvate
Which term describes the degree to which an element attracts electrons? - CORRECT ANSWER
Electronegativity
Which terms describe two atoms when they form a bond in which electrons are completely transferred
from one atom to the other? - CORRECT 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. - CORRECT 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. - CORRECT ANSWER D) A
hydrogen atom is transferred to the atom that loses an electron.
What kind of bond is formed when lithium and fluorine combine to form lithium fluoride? - CORRECT
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? - CORRECT ANSWER Hydrogen, Polar
Which of the following processes is driven by chemiosmosis? - CORRECT ANSWER Oxidative
Phosphorylation
Which of the following metabolic processes normally occurs regardless of whether or not oxygen (O2) is
present? - CORRECT ANSWER Glycolysis
Which molecule is metabolized in a cell to produce energy "currency" in the form of ATP? - CORRECT
ANSWER Glucose
True or false? The potential energy in an ATP molecule is derived mainly from its three phosphate
groups. - CORRECT ANSWER True
Which process is not part of the cellular respiration pathway that produces large amounts of ATP in a
cell? - CORRECT ANSWER Fermentation
Which step of the cellular respiration pathway can take place in the absence of oxygen? - CORRECT
ANSWER Glycolysis
Into which molecule are all the carbon atoms in glucose ultimately incorporated during cellular
respiration? - CORRECT ANSWER Carbon Dioxide
Which of the following statements about the electron transport chain is true? - CORRECT ANSWER
NADH and FADH2 donate their electrons to the chain.
Which stage of glucose metabolism produces the most ATP? - CORRECT ANSWER Electron transport and
chemiosmosis
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