Human physiology Exam With 100%
Correct Answers
Cells obtain energy by ________ food molecules such as glucose. - correct answers ✔✔oxidizing
Which of the following best describes the reduction of the coenzyme NAD? - correct answers
✔✔NAD+ + H -> NADH
A hydrogen atom consists of - correct answers ✔✔a proton and an electron.
Whenever a molecule is oxidized, another molecule must be reduced. - correct answers
✔✔True
NADH serves as an electron carrier that can donate its hydrogen to other molecules. - correct
answers ✔✔true
In glycolysis, glucose is converted to - correct answers ✔✔pyruvate
The NET result of a single glycolysis run is the formation of - correct answers ✔✔2 NADH and 2
ATP.
Under anaerobic conditions, the end-product of glycolysis is converted to - correct answers
✔✔lactic acid.
During glycolysis, a 6-carbon sugar diphosphate molecule is split into two 3-carbon sugar
phosphate molecules. - correct answers ✔✔true
, Under aerobic conditions, the end-product of glycolysis is further reduced to yield more ATP. -
correct answers ✔✔false
Before entering the Krebs cycle, pyruvate is converted to - correct answers ✔✔acetyl-CoA
A single "turn" of the Krebs cycle will yield - correct answers ✔✔1 ATP, 3 NADH, and 1 FADH2.
The initial reaction of the Krebs cycle involves the addition of a - correct answers ✔✔2-carbon
molecule to a 4-carbon molecule.
The Krebs cycle occurs in the mitochondrion. - correct answers ✔✔true
A single "turn" of the Krebs cycle involves three different decarboxylation reactions. - correct
answers ✔✔false
The sodium-potassium pump functions to pump - correct answers ✔✔sodium ions out of the
cell and potassium ions into the cell.
What is the source of energy used to power the sodium-potassium pump? - correct answers
✔✔breakdown of ATP
During one cycle, the sodium-potassium pump binds and moves. - correct answers ✔✔3 Na+
and 2 K+.
The sodium-potassium pump is a trans-membrane protein. - correct answers ✔✔True
The binding and release of sodium or potassium ions are due to conformational changes in the
protein. - correct answers ✔✔true
Correct Answers
Cells obtain energy by ________ food molecules such as glucose. - correct answers ✔✔oxidizing
Which of the following best describes the reduction of the coenzyme NAD? - correct answers
✔✔NAD+ + H -> NADH
A hydrogen atom consists of - correct answers ✔✔a proton and an electron.
Whenever a molecule is oxidized, another molecule must be reduced. - correct answers
✔✔True
NADH serves as an electron carrier that can donate its hydrogen to other molecules. - correct
answers ✔✔true
In glycolysis, glucose is converted to - correct answers ✔✔pyruvate
The NET result of a single glycolysis run is the formation of - correct answers ✔✔2 NADH and 2
ATP.
Under anaerobic conditions, the end-product of glycolysis is converted to - correct answers
✔✔lactic acid.
During glycolysis, a 6-carbon sugar diphosphate molecule is split into two 3-carbon sugar
phosphate molecules. - correct answers ✔✔true
, Under aerobic conditions, the end-product of glycolysis is further reduced to yield more ATP. -
correct answers ✔✔false
Before entering the Krebs cycle, pyruvate is converted to - correct answers ✔✔acetyl-CoA
A single "turn" of the Krebs cycle will yield - correct answers ✔✔1 ATP, 3 NADH, and 1 FADH2.
The initial reaction of the Krebs cycle involves the addition of a - correct answers ✔✔2-carbon
molecule to a 4-carbon molecule.
The Krebs cycle occurs in the mitochondrion. - correct answers ✔✔true
A single "turn" of the Krebs cycle involves three different decarboxylation reactions. - correct
answers ✔✔false
The sodium-potassium pump functions to pump - correct answers ✔✔sodium ions out of the
cell and potassium ions into the cell.
What is the source of energy used to power the sodium-potassium pump? - correct answers
✔✔breakdown of ATP
During one cycle, the sodium-potassium pump binds and moves. - correct answers ✔✔3 Na+
and 2 K+.
The sodium-potassium pump is a trans-membrane protein. - correct answers ✔✔True
The binding and release of sodium or potassium ions are due to conformational changes in the
protein. - correct answers ✔✔true
