BIOL 271 Module 2 exam (Latest Update
) Microbiology Questions &
Answers {Grade A} 100% Correct - Portage
Learning
What are the two main strategies utilized by cells to replenish the supply of NAD+? -
Correct answer 1. Fermentation
2. Respiration
What is the first step in anerobic and aerobic carbohydrate metabolism? - Correct
answer Glycolysis
Why does glycolysis require energy? - Correct answer Simply because it is hard work
to break stuff, glycolysis breaks bonds of glucose which requires energy, but at the
same time by breaking the bonds of glucose and placing it in ATP and energy carriers,
cells are able to yield energy through this process.
,What is Fermentation? - Correct answer an anaerobic process in which NADH is
converted back to NAD+ while pyruvate is converted to a waste byproduct, to be
eliminated from the cell.
Does fermentation produce any additional energy for the cell? - Correct answer No.
While fermentation may resupply the levels of NAD+ in a cell, it cannot oxidize
pyruvate so it does not produce any additional energy.
T/F:
many microbes are capable of processing pyruvate further, releasing high yields of
energy through respiration. - Correct answer True
T/F:
Both anaerobic and aerobic metabolism use cellular respiration. - Correct answer
True
What is the difference between aerobic and anaerobic pathways? - Correct answer the
final electron acceptor;
,aerobic pathway = oxygen is the final electron acceptor
anaerobic pathway = uses alternative electron acceptors
Fermentation allows organisms running _______ on final electron acceptors or that do
not have _______ to convert _______ to NAD+. - Correct answer low; electron transport
chains; NADH
Through fermentation, converting NADH to NAD+ allows for glycolysis to continue by
providing _______ substrate to capture _______ in the reactions. - Correct answer
Oxidized; electrons
What is the purpose of fermentation? - Correct answer to regenerate electron carriers
(NAD+)
Fermentation is a temporary pathway, why? - Correct answer because it produces
toxic products that could harm the cell
, Define Respiration... - Correct answer a more efficient aerobic process used by
microorganisms to produce energy
Since most of the potential energy from glucose is still locked in the form of _______
following the initial stage of glycolysis, respiration is the process of ________ that
energy. - Correct answer pyruvate; unlocking
The central pathway of respiration is called the _______. - Correct answer Tricarboxylic
acid cycle (TCA)
What is another term for the TCA? - Correct answer The Krebs Cycle
What is the Krebs Cycle named after? - Correct answer 1953 Noble Prize-winning
scientist Hans Krebs
What coenzyme does the Krebs Cycle require that is similar to NAD? - Correct answer
FAD, Flavin adenine dinucleotide
) Microbiology Questions &
Answers {Grade A} 100% Correct - Portage
Learning
What are the two main strategies utilized by cells to replenish the supply of NAD+? -
Correct answer 1. Fermentation
2. Respiration
What is the first step in anerobic and aerobic carbohydrate metabolism? - Correct
answer Glycolysis
Why does glycolysis require energy? - Correct answer Simply because it is hard work
to break stuff, glycolysis breaks bonds of glucose which requires energy, but at the
same time by breaking the bonds of glucose and placing it in ATP and energy carriers,
cells are able to yield energy through this process.
,What is Fermentation? - Correct answer an anaerobic process in which NADH is
converted back to NAD+ while pyruvate is converted to a waste byproduct, to be
eliminated from the cell.
Does fermentation produce any additional energy for the cell? - Correct answer No.
While fermentation may resupply the levels of NAD+ in a cell, it cannot oxidize
pyruvate so it does not produce any additional energy.
T/F:
many microbes are capable of processing pyruvate further, releasing high yields of
energy through respiration. - Correct answer True
T/F:
Both anaerobic and aerobic metabolism use cellular respiration. - Correct answer
True
What is the difference between aerobic and anaerobic pathways? - Correct answer the
final electron acceptor;
,aerobic pathway = oxygen is the final electron acceptor
anaerobic pathway = uses alternative electron acceptors
Fermentation allows organisms running _______ on final electron acceptors or that do
not have _______ to convert _______ to NAD+. - Correct answer low; electron transport
chains; NADH
Through fermentation, converting NADH to NAD+ allows for glycolysis to continue by
providing _______ substrate to capture _______ in the reactions. - Correct answer
Oxidized; electrons
What is the purpose of fermentation? - Correct answer to regenerate electron carriers
(NAD+)
Fermentation is a temporary pathway, why? - Correct answer because it produces
toxic products that could harm the cell
, Define Respiration... - Correct answer a more efficient aerobic process used by
microorganisms to produce energy
Since most of the potential energy from glucose is still locked in the form of _______
following the initial stage of glycolysis, respiration is the process of ________ that
energy. - Correct answer pyruvate; unlocking
The central pathway of respiration is called the _______. - Correct answer Tricarboxylic
acid cycle (TCA)
What is another term for the TCA? - Correct answer The Krebs Cycle
What is the Krebs Cycle named after? - Correct answer 1953 Noble Prize-winning
scientist Hans Krebs
What coenzyme does the Krebs Cycle require that is similar to NAD? - Correct answer
FAD, Flavin adenine dinucleotide
