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BIO 181 Exam 2- Questions & Answers
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BIO 181 Exam 2- Questions & Answers
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BIO 181 Exam 2- Questions & AnswersWith regards to glycolysis, what is the most important molecule that is generated? Correct
Ans-pyruvate
Briefly describe how ATP synthase generates ATP. Correct Ans-ATP synthesis is a protein
complex that is essentially a proton-driven rotary motor that produces ATP from ADP and Pi.
ATP serves energy currency of the cell and can be though of as an available source of chemical
energy.
What is the final electron acceptor in cellular respiration? Correct Ans-oxygen
Where in the cell does chemiosmosis occur and what is its purpose? Correct Ans-
mitochondria or chloroplast, movemnet of ions across a selectively permeable membrane.
Where does oxidative phosphorlation occur in the cell and what is its purpose? Correct Ans-
Inner membrane. Create ATP
Aerobic Correct Ans-relating to, involving, or requiring free oxygen.
Anaerobic Correct Ans-relating to, involving, or requiring an absence of free oxygen.
cellular respiration Correct Ans-The series of metabolic processes by which living cells
produce energy through the oxidation of organic substances.
, Fermentation Correct Ans-is a metabolic process that converts sugar to acids, gases or
alcohol. It occurs in yeast and bacteria, but also in oxygen-starved muscle cells, as in the case of
lactic acid fermentation.
Catabolic Pathway Correct Ans-A series of metabolic reactions leading to breakdown of a
complex organic molecule to a simpler ones, with release of energy.
Anabolic Pathway Correct Ans-is the set of metabolic pathways that construct molecules
from smaller units. These reactions require energy.
Kinetic Energy Correct Ans-The energy possessed by a body because of its motion, equal to
one half the mass of the body times the square of its speed.
Potential Energy Correct Ans-the energy, existing in a body by virtue of its position or state of
existence, which is not being exerted at the time.
Exergonic Reaction Correct Ans-proceeds with a net release of free energy and is
spontaneous (-ΔG)
Endergonic Reaction Correct Ans-absorbs free energy from its surrounding and is non
spontaneous (+ΔG)
Explain how ATP performs cellular work Correct Ans-ADP is combined with a phosphate to
form ATP in the reaction ADP+Pi+free energy→ATP+H2O. The energy released from the
hydrolysis of ATP into ADP is used to perform cellular work, usually by coupling the exergonic
reaction of ATP hydrolysis with endergonic reactions.
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