Biochemistry 301 - Exam MCQs | Questions and
Answers (Verified Answers)
When free fatty acids are attached to CoA in the cytoplasm, what intermediate is formed? -
✔✔Acyl Adenylate
How do fatty acids pass into the mitochondrial matrix? - ✔✔they cross the membranes as
acyl-carnitines
When 2 electrons from FADH2 are transported to oxygen via the mitochondrial electron
transport chain, how many ATPs are formed? - ✔✔1.5
Where is the cytochrome c located? - ✔✔intermembrane space
The RQ or respiratory quotient is the Vmax of oxygen use divided by the resting rate. What is
the RQ for normally coupled mitochondria? (The RQ for completely uncoupled mitochondria is
1.0) - ✔✔10
Which conformation of the binding site in E1 causes formation of ATP? - ✔✔tight
The Wernicke-Korsakoff Syndrome is a defect in the structure of Transketolase, but symptoms
are mainly observed in alcoholics. Why? - ✔✔alcoholics often have vitamin deficiencies
In the lab Erythrose-4-P and Fructose-6-P are mixed with Transaldolase. The resulting sugars are
found to be - ✔✔Sedoheptulose-7-P and G3P
The Pentose Phosphate Pathway enzymes provide an important part of the Calvin Cycle. This
cycle is NOT a part of - ✔✔the light reaction
, Which human tissue contains the highest level of PPP enzymes? - ✔✔adipose
Which result implies a deficiency of Branching Enzyme (Type IV Andersen's disease?) if in vitro
hydrolysis of assayed liver glycogen yields: - ✔✔95% G1P, 5% Glucose
Which is always true? The inactive form of Glycogen Phosphorylase is - ✔✔tense
The activity of which of the following enzymes is NOT required for the release of large amounts
of glucose from liver glycogen? - ✔✔Glycogen Phosphorylase
If your supply of liver glycogen is depleted, you can replenish it by eating as little as - ✔✔one
piece of cake
Which of the followning features are common to both glycogen synthesis and glycogen
breakdown? Select all correct answers. - ✔✔- Both involve Glucose-1-Phosphate
- Both are driven in part by the hydrolysis of pyrophosphate
- Both occur on the cytoplasmic glycogen granules
During glycogen synthesis, the "Branching" enzyme moves how many residues from the main
chain to form a branch? - ✔✔7
Ketone bodies are found in the blood. Which is not a ketone body? - ✔✔Acetoacetyl CoA
Which enzyme is under the control of a hormonal cascade, just like Glycogen Phosphorylase? -
✔✔Lipase
Which would NOT lead to ketosis - ✔✔low cal diet including carbs
Answers (Verified Answers)
When free fatty acids are attached to CoA in the cytoplasm, what intermediate is formed? -
✔✔Acyl Adenylate
How do fatty acids pass into the mitochondrial matrix? - ✔✔they cross the membranes as
acyl-carnitines
When 2 electrons from FADH2 are transported to oxygen via the mitochondrial electron
transport chain, how many ATPs are formed? - ✔✔1.5
Where is the cytochrome c located? - ✔✔intermembrane space
The RQ or respiratory quotient is the Vmax of oxygen use divided by the resting rate. What is
the RQ for normally coupled mitochondria? (The RQ for completely uncoupled mitochondria is
1.0) - ✔✔10
Which conformation of the binding site in E1 causes formation of ATP? - ✔✔tight
The Wernicke-Korsakoff Syndrome is a defect in the structure of Transketolase, but symptoms
are mainly observed in alcoholics. Why? - ✔✔alcoholics often have vitamin deficiencies
In the lab Erythrose-4-P and Fructose-6-P are mixed with Transaldolase. The resulting sugars are
found to be - ✔✔Sedoheptulose-7-P and G3P
The Pentose Phosphate Pathway enzymes provide an important part of the Calvin Cycle. This
cycle is NOT a part of - ✔✔the light reaction
, Which human tissue contains the highest level of PPP enzymes? - ✔✔adipose
Which result implies a deficiency of Branching Enzyme (Type IV Andersen's disease?) if in vitro
hydrolysis of assayed liver glycogen yields: - ✔✔95% G1P, 5% Glucose
Which is always true? The inactive form of Glycogen Phosphorylase is - ✔✔tense
The activity of which of the following enzymes is NOT required for the release of large amounts
of glucose from liver glycogen? - ✔✔Glycogen Phosphorylase
If your supply of liver glycogen is depleted, you can replenish it by eating as little as - ✔✔one
piece of cake
Which of the followning features are common to both glycogen synthesis and glycogen
breakdown? Select all correct answers. - ✔✔- Both involve Glucose-1-Phosphate
- Both are driven in part by the hydrolysis of pyrophosphate
- Both occur on the cytoplasmic glycogen granules
During glycogen synthesis, the "Branching" enzyme moves how many residues from the main
chain to form a branch? - ✔✔7
Ketone bodies are found in the blood. Which is not a ketone body? - ✔✔Acetoacetyl CoA
Which enzyme is under the control of a hormonal cascade, just like Glycogen Phosphorylase? -
✔✔Lipase
Which would NOT lead to ketosis - ✔✔low cal diet including carbs
