Biochemistry Final Exam Questions and Answers Already Passed
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Biochemistry
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Biochemistry
Biochemistry Final Exam Questions and
Answers Already Passed
What role do protein domains play in enzyme function?
Protein domains allow enzymes to perform specific functions, often facilitating interactions
with other molecules or substrates.
How do post-translational modifications aff...
Biochemistry Final Exam Questions and
Answers Already Passed
What role do protein domains play in enzyme function?
✔✔ Protein domains allow enzymes to perform specific functions, often facilitating interactions
with other molecules or substrates.
How do post-translational modifications affect protein behavior?
✔✔ They can alter protein activity, localization, and stability, enabling dynamic responses to
cellular signals.
What is the significance of the "lock and key" model in enzyme-substrate interactions?
✔✔ It illustrates how specific substrates fit precisely into an enzyme's active site, allowing for
efficient catalysis.
How do membrane proteins contribute to cell signaling?
✔✔ They act as receptors, transmitting signals from the extracellular environment to elicit
cellular responses.
1
,What is the function of the cytoskeleton in maintaining cell shape?
✔✔ The cytoskeleton provides structural support, enabling cells to maintain their shape and
facilitating movement.
How does the body utilize ketone bodies during prolonged fasting?
✔✔ Ketone bodies serve as an alternative energy source for the brain and other tissues when
glucose availability is low.
What are the unique features of archaeal cell membranes compared to bacterial membranes?
✔✔ Archaeal membranes contain ether-linked lipids and can form monolayers, allowing them to
withstand extreme environments.
How do reactive oxygen species (ROS) contribute to cellular signaling?
✔✔ ROS can function as signaling molecules, influencing processes such as apoptosis and
immune responses at low concentrations.
What is the role of proteolytic enzymes in protein turnover?
✔✔ They break down damaged or unneeded proteins, recycling amino acids for new protein
synthesis.
2
, How do hydrophobic interactions influence protein folding?
✔✔ Hydrophobic amino acids tend to cluster away from water, driving the folding process and
contributing to the protein's final structure.
What is the connection between metabolism and thermoregulation in endothermic animals?
✔✔ Metabolism generates heat as a byproduct, helping maintain a stable internal temperature in
warm-blooded animals.
How do dietary fibers contribute to gut health?
✔✔ They promote the growth of beneficial gut bacteria and improve bowel regularity,
supporting overall digestive health.
What is the significance of the tertiary structure in enzyme function?
✔✔ The tertiary structure determines the enzyme's active site configuration, directly impacting
its ability to catalyze reactions.
How does the concept of energy coupling enable cellular work?
3
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