Exam (elaborations)
BIO 425 EXAM 2 QUESTIONS AND ANSWERS (100% PASS)
BIO 425 EXAM 2 QUESTIONS AND ANSWERS (100% PASS)
[Show more]
Content preview
©PREP4EXAMS@2024 [REAL EXAM DUMPS] Thursday, July 18, 2024 5:35 PMBIO 425 EXAM 2 QUESTIONS AND ANSWERS (100% PASS)
An enzyme:
a. is typically effective only in large amounts.
b. is a type of carbohydrate.
c. raises the activation energy of its reaction.
d. functions as a catalyst.
e. is permanently altered during the course of its reaction. - ✔️✔️functions as a catalyst.
Most enzymes are:
a. RNA molecules.
b. proteins.
c. carbohydrates.
d. lipids.
e. DNA molecules. - ✔️✔️proteins
A substrate binds to its enzyme at a location called the ______ site.
a. coenzyme
b. substrate
c. active
d. polypeptide
e. cofactor - ✔️✔️active
1
,©PREP4EXAMS@2024 [REAL EXAM DUMPS] Thursday, July 18, 2024 5:35 PM
A negatively charged portion of a substrate molecule would most likely fit into a ______ region
of its enzyme's active site.
a. positively charged
b. negatively charged
c. hydrophilic
d. hydrophobic
e. polar - ✔️✔️positively charged
The general name for a nonprotein component required by some enzymes is a:
a. metal ion.
b. cofactor.
c. substrate.
d. prosthetic group.
e. coenzyme. - ✔️✔️cofactor
Most enzymes that catalyze phosphorylation reactions require ______ as a cofactor.
a. NAD+
b. Mg2+
c. Ca2+
d. AMP
e. an iron-sulfur cluster - ✔️✔️Mg2+
The vitamin niacin is part of the ______ molecule.
2
,©PREP4EXAMS@2024 [REAL EXAM DUMPS] Thursday, July 18, 2024 5:35 PM
a. ferredoxin
b. iron-sulfur
c. pyridoxal phosphate
d. pyrophosphate
e. NAD+ - ✔️✔️NAD+
In a NAD+ molecule, a pyrophosphate bridge joins:
a. two nicotinamide molecules.
b. two adenine molecules.
c. one ribose molecule with one nicotinamide molecule.
d. two ribose molecules.
e. one ribose molecule with one adenine molecule. - ✔️✔️two ribose molecules
Which of the following statements about metabolic pathways is FALSE?
a. The enzymes of some pathways are segregated inside specific organelles.
b. The enzymes of some pathways are embedded in specific membranes.
c. The enzymes of most pathways allow intermediate products to accumulate.
d. Exergonic reactions in the pathway will pull forward preceding reactions.
e. The products from exergonic reactions will push along subsequent reactions. - ✔️✔️The
enzymes of most pathways allow intermediate products to accumulate.
Isozymes are:
3
, ©PREP4EXAMS@2024 [REAL EXAM DUMPS] Thursday, July 18, 2024 5:35 PM
a. RNA molecules that catalyze metabolic reactions.
b. identical coenzymes that require different metal ions.
c. identical coenzymes located in different parts of the cell.
d. different enzymes that catalyze identical reactions.
e. identical enzymes that catalyze different reactions. - ✔️✔️different enzymes that catalyze
identical reactions.
As the temperature increases, the rate of an enzyme-catalyzed reaction usually:
a. increases constantly.
b. increases up to a point, then decreases.
c. decreases constantly.
d. decreases to a point, then increases.
e. increases, then decreases, then increases again. - ✔️✔️increases up to a point, decreases
Which of the following statements concerning the effect of pH on enzyme activity is FALSE?
a. Enzyme shape changes as the pH changes.
b. The pH affects positively-charged amino acids.
c. The pH affects negatively-charged amino acids.
d. The binding capacity of an enzyme is affected by pH.
e. Enzymes are always present at their pH optimum. - ✔️✔️Enzymes are always present at their
pH optimum.
Denaturation of an enzyme refers to the:
4
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller OliviaWest. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
52928 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now