PHYSIOLOGY MIDTERM EXAM || 175
QUESTIONS AND EXPERT VERIFIED
ANSWERS 2025 EXAM
Which of the following statements about the law of mass action is
FALSE?
A) The slope of a curve represents the rate of reaction; the greater the
slope the faster the rate of reaction.
B) It is critical in physiological processes because concentrations of
reactants and products in cells and body fluids constantly change.
C)An increase in the concentration of reactants relative to products tends
to push a reaction forward, and an increase in the concentration of
products relative to reactants tends to push a reaction in reverse.
D) After reaching equilibrium, more reactant is added, which causes the
production of more product.
,E) Equilibrium is reached when the concentration of reactant equals the
concentration of product. - ANSWER- E
In skeletal muscle, ATP can be synthesized by transferring a phosphate
group from creatine-P to ADP to form ATP and creatine. In this
example, ATP was synthesized by what process?
A) oxidative phosphorylation
B) oxidation
C) reduction
D) substrate-level phosphorylation
E) condensation - ANSWER- D
Potential energy describes the energy possessed by an object in motion.
T/F - ANSWER- FALSE
During what type of reaction are electrons removed from the reactant?
A) reduction
B) phosphorylation
C) oxidation
D) electrocution
,E) None of the answers is correct. - ANSWER- C
How do enzymes speed up chemical reactions?
A) by increasing the activation energy barrier
B) by making sure the enzyme is part of the product
C) by lowering the temperature, thereby reducing friction
D) by converting kinetic energy back to potential energy
E) by lowering the activation energy barrier - ANSWER- E
An increase in temperature increases the potential energy of molecules.
T/F - ANSWER- FALSE
Which of the following is a correct description of an anabolic pathway?
A) Glycogen is synthesized in the cytosol from glucose.
B) Proteins are transcribed from DNA in the nucleus.
, C) The primary site of the breakdown of triglycerides is in the adipose
tissue.
P) Proteins are degraded by mRNA in the cytoplasm.
E) The primary site of the synthesis of triglycerides is in the liver. -
ANSWER- A
Tony is about to participate in his first 10K run. One of his friends told
him to make sure to "carbo load" and to take a niacin supplement before
the race. Tony had heard the term "carbo loading" before but was not
sure why it was necessary and had no idea why he would need a niacin
supplement. He had been training for months and was confident that he
would finish the race easily and, therefore, did not heed his friend's
advice.
On the day of the race, Tony was so excited it felt like he was flying
through the first half of the race. Tony wanted to beat his current best
time and was nearing the end of the race when he decided to pick up his
pace to the finish line. Unfortunately, Tony became fatigued and had to
walk to the finish line out of breath and with his muscles burning. -
ANSWER- Eating excess carbohydrates over a period of time allows the
excess carbohydrates to be stored as glycogen in your liver and muscles.
During a race, the glycogen is converted to glucose and, therefore, the
glucose can be utilized to provide the body with more energy.
In the chemical equation A + B ⇌ C + D, the materials on the left-hand
side of the equation are known as ________ whereas the materials on
the right-hand side of the equation are know as ________.
QUESTIONS AND EXPERT VERIFIED
ANSWERS 2025 EXAM
Which of the following statements about the law of mass action is
FALSE?
A) The slope of a curve represents the rate of reaction; the greater the
slope the faster the rate of reaction.
B) It is critical in physiological processes because concentrations of
reactants and products in cells and body fluids constantly change.
C)An increase in the concentration of reactants relative to products tends
to push a reaction forward, and an increase in the concentration of
products relative to reactants tends to push a reaction in reverse.
D) After reaching equilibrium, more reactant is added, which causes the
production of more product.
,E) Equilibrium is reached when the concentration of reactant equals the
concentration of product. - ANSWER- E
In skeletal muscle, ATP can be synthesized by transferring a phosphate
group from creatine-P to ADP to form ATP and creatine. In this
example, ATP was synthesized by what process?
A) oxidative phosphorylation
B) oxidation
C) reduction
D) substrate-level phosphorylation
E) condensation - ANSWER- D
Potential energy describes the energy possessed by an object in motion.
T/F - ANSWER- FALSE
During what type of reaction are electrons removed from the reactant?
A) reduction
B) phosphorylation
C) oxidation
D) electrocution
,E) None of the answers is correct. - ANSWER- C
How do enzymes speed up chemical reactions?
A) by increasing the activation energy barrier
B) by making sure the enzyme is part of the product
C) by lowering the temperature, thereby reducing friction
D) by converting kinetic energy back to potential energy
E) by lowering the activation energy barrier - ANSWER- E
An increase in temperature increases the potential energy of molecules.
T/F - ANSWER- FALSE
Which of the following is a correct description of an anabolic pathway?
A) Glycogen is synthesized in the cytosol from glucose.
B) Proteins are transcribed from DNA in the nucleus.
, C) The primary site of the breakdown of triglycerides is in the adipose
tissue.
P) Proteins are degraded by mRNA in the cytoplasm.
E) The primary site of the synthesis of triglycerides is in the liver. -
ANSWER- A
Tony is about to participate in his first 10K run. One of his friends told
him to make sure to "carbo load" and to take a niacin supplement before
the race. Tony had heard the term "carbo loading" before but was not
sure why it was necessary and had no idea why he would need a niacin
supplement. He had been training for months and was confident that he
would finish the race easily and, therefore, did not heed his friend's
advice.
On the day of the race, Tony was so excited it felt like he was flying
through the first half of the race. Tony wanted to beat his current best
time and was nearing the end of the race when he decided to pick up his
pace to the finish line. Unfortunately, Tony became fatigued and had to
walk to the finish line out of breath and with his muscles burning. -
ANSWER- Eating excess carbohydrates over a period of time allows the
excess carbohydrates to be stored as glycogen in your liver and muscles.
During a race, the glycogen is converted to glucose and, therefore, the
glucose can be utilized to provide the body with more energy.
In the chemical equation A + B ⇌ C + D, the materials on the left-hand
side of the equation are known as ________ whereas the materials on
the right-hand side of the equation are know as ________.
