TCC Biology Exam 2 with all Correct & 100% Verified
Answers |Latest Version |Already Graded A+
What are two types of electron carriers used in cellular respiration? ✔Correct Answer-
NAD+/NADH and FAD/FADH2
When an atom or molecule gains one or more electrons, it is said to be ✔Correct Answer-
reduced.
You return home to find that your baby brother has scattered his toy trains and trucks all over
the floor of your room. As you begin to pick up the toys and put them away, you realize that
even though he is just a baby, he has clearly mastered ✔Correct Answer-the second law of
thermodynamics; free energy
The energy needed to destabilize existing chemical bonds and start a chemical reaction is called
✔Correct Answer-activation energy.
The synthesis of sugar molecules through the process of photosynthesis requires energy
absorbed from sunlight. Bearing this in mind, what kind of reaction is photosynthesis?
✔Correct Answer-endergonic
The phosphate groups of ATP are held together by unstable bonds that can be broken to release
energy. ✔Correct Answer-Many metabolic pathways are ultimately concerned with ATP;
either with the generation of ATP, or with the requirement of ATP for that pathway to function.
Why is ATP so important to metabolism?
A drug binds to the active site of an enzyme. If it is bound to the active site of the enzyme, it
prevents substrate binding. This drug would be considered a ✔Correct Answer-competitive
inhibitor
decrease the temperature of the incubator where the cells are growing ✔Correct Answer-You
are studying an enzyme-catalyzed reaction that induces a particular cellular activity in the lab. If
you wanted to slow down that particular cellular activity by controlling the enzyme, what could
you do?
Metal ions, such as iron, are used by enzymes to aid enzymatic activity. They are known as
____________. ✔Correct Answer-Cofactors
These mutations most likely change the shape of the active site of the enzyme ✔Correct
Answer-A current problem in modern medicine is the development of drug-resistance
mutations. This occurs when a mutation arises in a disease-causing microbe making it resistant
to a drug and thus rendering the drug useless in treating a specific disease. Many useful drugs
, are competitive inhibitors of specific enzymes, and the drug-resistance mutations prevent the
binding of the drug. These types of mutations, in addition to preventing competitive inhibitor
binding, can also sometimes reduce the activity of the enzyme. Why is that the case?
Organisms that depend on the energy stored in chemical bonds by other organisms for their
food energy are called ________. ✔Correct Answer-heterotrophs
In animals that take in oxygen from their environment, glucose is broken down into carbon
dioxide and water in a process called ✔Correct Answer-aerobic respiration
What aspect of cellular respiration occurs in the cytoplasm in eukaryotic cells? ✔Correct
Answer-glycolysis
in the mitochondria ✔Correct Answer-Where does pyruvate oxidation occur in eukaryotic
cells?
In bacterial cell division, the cell divides into two nearly equal halves. This process is referred to
as ✔Correct Answer-binary fission
At the end of glycolysis ✔Correct Answer-At what point in cellular respiration is pyruvate
produced?
the mitochondria ✔Correct Answer-All of the reactions of cellular respiration that occur after
glycolysis take place in what part of the eukaryotic cell?
2 CO2, 3 NADH, 1 FADH2, 1 ATP ✔Correct Answer-What are the products of one turn of the
Krebs cycle?
to generate and maintain the proton gradient essential for ATP production. ✔Correct Answer-
Why are the components of the electron transport chain embedded in the inner mitochondrial
membrane rather than floating freely in the cytoplasm of mitochondrial matrix?
a difference in H+ concentration on the two sides of the inner mitochondrial membrane.
✔Correct Answer-In aerobic respiration, chemiosmotic generation of ATP is driven by
The product will likely cause weight gain instead of loss. You look forward to reading news
stories confirming what you have already figured out and try to convince friends and family not
to buy the product in the meantime. ✔Correct Answer-A new product being marketed for
rapid weight loss, "GnuYou", is receiving rave reviews from celebrities and social media
influencers. You, being a diligent student of the sciences and critical thinker, decide to check the
mechanism of the product to determine whether it actually does what the makers claim. You
find on the product website, tucked in an obscure page titled "Product Technical Details", what
you are looking for: "This product (GnuYou) is formulated to influence the efficacy of the cellular
respiration within eukaryotic cells by increasing the number of free hydrogen ions or protons in
Answers |Latest Version |Already Graded A+
What are two types of electron carriers used in cellular respiration? ✔Correct Answer-
NAD+/NADH and FAD/FADH2
When an atom or molecule gains one or more electrons, it is said to be ✔Correct Answer-
reduced.
You return home to find that your baby brother has scattered his toy trains and trucks all over
the floor of your room. As you begin to pick up the toys and put them away, you realize that
even though he is just a baby, he has clearly mastered ✔Correct Answer-the second law of
thermodynamics; free energy
The energy needed to destabilize existing chemical bonds and start a chemical reaction is called
✔Correct Answer-activation energy.
The synthesis of sugar molecules through the process of photosynthesis requires energy
absorbed from sunlight. Bearing this in mind, what kind of reaction is photosynthesis?
✔Correct Answer-endergonic
The phosphate groups of ATP are held together by unstable bonds that can be broken to release
energy. ✔Correct Answer-Many metabolic pathways are ultimately concerned with ATP;
either with the generation of ATP, or with the requirement of ATP for that pathway to function.
Why is ATP so important to metabolism?
A drug binds to the active site of an enzyme. If it is bound to the active site of the enzyme, it
prevents substrate binding. This drug would be considered a ✔Correct Answer-competitive
inhibitor
decrease the temperature of the incubator where the cells are growing ✔Correct Answer-You
are studying an enzyme-catalyzed reaction that induces a particular cellular activity in the lab. If
you wanted to slow down that particular cellular activity by controlling the enzyme, what could
you do?
Metal ions, such as iron, are used by enzymes to aid enzymatic activity. They are known as
____________. ✔Correct Answer-Cofactors
These mutations most likely change the shape of the active site of the enzyme ✔Correct
Answer-A current problem in modern medicine is the development of drug-resistance
mutations. This occurs when a mutation arises in a disease-causing microbe making it resistant
to a drug and thus rendering the drug useless in treating a specific disease. Many useful drugs
, are competitive inhibitors of specific enzymes, and the drug-resistance mutations prevent the
binding of the drug. These types of mutations, in addition to preventing competitive inhibitor
binding, can also sometimes reduce the activity of the enzyme. Why is that the case?
Organisms that depend on the energy stored in chemical bonds by other organisms for their
food energy are called ________. ✔Correct Answer-heterotrophs
In animals that take in oxygen from their environment, glucose is broken down into carbon
dioxide and water in a process called ✔Correct Answer-aerobic respiration
What aspect of cellular respiration occurs in the cytoplasm in eukaryotic cells? ✔Correct
Answer-glycolysis
in the mitochondria ✔Correct Answer-Where does pyruvate oxidation occur in eukaryotic
cells?
In bacterial cell division, the cell divides into two nearly equal halves. This process is referred to
as ✔Correct Answer-binary fission
At the end of glycolysis ✔Correct Answer-At what point in cellular respiration is pyruvate
produced?
the mitochondria ✔Correct Answer-All of the reactions of cellular respiration that occur after
glycolysis take place in what part of the eukaryotic cell?
2 CO2, 3 NADH, 1 FADH2, 1 ATP ✔Correct Answer-What are the products of one turn of the
Krebs cycle?
to generate and maintain the proton gradient essential for ATP production. ✔Correct Answer-
Why are the components of the electron transport chain embedded in the inner mitochondrial
membrane rather than floating freely in the cytoplasm of mitochondrial matrix?
a difference in H+ concentration on the two sides of the inner mitochondrial membrane.
✔Correct Answer-In aerobic respiration, chemiosmotic generation of ATP is driven by
The product will likely cause weight gain instead of loss. You look forward to reading news
stories confirming what you have already figured out and try to convince friends and family not
to buy the product in the meantime. ✔Correct Answer-A new product being marketed for
rapid weight loss, "GnuYou", is receiving rave reviews from celebrities and social media
influencers. You, being a diligent student of the sciences and critical thinker, decide to check the
mechanism of the product to determine whether it actually does what the makers claim. You
find on the product website, tucked in an obscure page titled "Product Technical Details", what
you are looking for: "This product (GnuYou) is formulated to influence the efficacy of the cellular
respiration within eukaryotic cells by increasing the number of free hydrogen ions or protons in
