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EXPH 386 Exam1 Questions and Correct Answers
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EXPH 386 Exam1 Questions and Correct Answers
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EXPH 386 Exam1The energy yield from food is in part determined by the efficiency of digestion - Answer-coefficient of
digestibility
Why do lipids contain more energy that carbs or proteins? - Answer-lipids are more energy dense
because they have more hydrogen atoms that can be oxidized
energy relates to the ability to do _____ - Answer-work
the first law of thermodynamics is the.. - Answer-conservation of energy
T OR F
the farther a reaction is from equilibrium, the more energy it can release - Answer-true
A person ingests some food which is subsequently broken down to water and carbon dioxide. What is
this process called? What type of reaction is this? What molecule does this result in? - Answer-
catabolism, exergonic, ADP + PI
T OR F
, ATP breakdown is an an aerobic process - Answer-false
An athlete is sprinting for 8 to 10 seconds. His skeletal muscle cells contain a very small amount of ATP.
When the initial supply of ATP is catabolized, a molecule is split to resynthesize ATP. What is the name
of the molecule and enzyme used in the reaction? - Answer-enzyme: adenylate kinase...
molecule: creatine kinase
What reaction is occuring in the process of ATP synthesis via the enzyme creatine kinase? - Answer-
phosphorylation
How much energy is released when the enzyme ______ splits ATP into _____ in vitro? - Answer-
ATPase....7.3 kcal
How much energy is released when the enzyme ______ splits ATP into _____ in vivo? - Answer-
ATPase... 10-11 kcal
Hydrogen atoms are stripped from carbohydrates, lipids, and proteins during energy metabolism. What
type of enzyme catalyzes this reaction? - Answer-dehydrogenase enzymes
Describe the mechanism that occurs in oxidative phosphorylation, which enables ATP synthesis. -
Answer-ATP is synthesized during the transfer of electrons from NADH and FADH2 to molecular O2
For every NADH and H+ in electron transport chain, ____________ molecules are produced - Answer-3
ATP
For every FADH in the electron transport chain, _____ molecules are produced - Answer-2 ATP
What is the final electron acceptor in the electron transport chain? - Answer-oxygen
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