BioChem 210 Final Exam 2027 - Portage Learning Question and Answer | 100% Correct Answers | Exam Review Pack

BioChem 210 Final Exam 2027 - Portage Learning Question and
Answer | 100% Correct Answers | Exam Review Pack

Question 1.
Small elements that are common in biomolecules:

Correct Answer: CHOPS N: - carbon - hydrogen - oxygen - phosphorous - sulfur
- nitrogen


Question 2.
T/F: The time it takes for a compound to flow through a metabolic pathway is called the
flux.

Correct Answer: true


Question 3.
T/F: Proteins, carbohydrates, and fats all get broken down into NADH and FADH2 in
energy production.

Correct Answer: true


Question 4.
T/F: A fat is a lipid molecules that is a liquid at room temperature.

Correct Answer: false


Question 5.
In RNA, guanine always pairs with:

Correct Answer: cytosine


Question 6.
In RNA, adenine always pairs with:

Correct Answer: uracil


Question 7.
In DNA, adenine always pairs with:

Correct Answer: thymine


Question 8.
Water is considered a polar solvent due to attractive forces known as hydrogen bonds. A
hydrogen bond is:

,Correct Answer: an attractive force between molecules where partially
positive hydrogen atoms are attracted to partially negative atoms of F, O, or N


Question 9.
What is a London force?

Correct Answer: a temporary attraction between atoms due to electron
alignment


Question 10.
What is a dipole-dipole force?

Correct Answer: an attraction between the positive end of one polar molecule
and the negative end of another
• What attributes contribute to water's unusual properties? -✓✓1. geometry of
the molecule
2. polarity of the -OH bonds
3. ability of water molecules to hydrogen bond
4. body angle of water molecules to H bond


Question 11.
The H+ concentration of a solution is 7.9 x 10^-13 M. What is the pH?

Correct Answer: 12.1
pH = -log(7.9 x 10^-13)


Question 12.
What represents the free-energy change of a reaction?

Correct Answer: ΔG = Gibbs free energy


Question 13.
What is the measure of heat content in a reaction?

Correct Answer: ΔH = enthalpy


Question 14.
What is the measure of order of the system in a reaction?

Correct Answer: ΔS = entropy


Question 15.
A fibrous protein is an example of a protein ___.

Correct Answer: conformation

, Question 16.
What is an example of protein conformation?

Correct Answer: fibrous and globular


Question 17.
Any molecule or ion that is necessary for an enzyme's function is called:

Correct Answer: cofactor


Question 18.
In a particular cell, molecules X binds to an enzyme causing to stop catalyzing reactions.
Molecule X is called what?

Correct Answer: inhibitor


Question 19.
What is the function of lipids in cells?

Correct Answer: 1. energy source/storage
2. structural role in membranes (myelin sheaths)
3. vitamins
4. basis for dye molecules (carotenoids)


Question 20.
What is the function of carbohydrates in cells?

Correct Answer: 1. structural role in DNA and RNA
2. intermediate in metabolism
3. energy source for cells
• In a particular cell, molecule X binds near the active site on an enzyme
causing it to slow catalyzing reactions. Molecules X is called what?
-✓✓uncompetitive inhibitor


Question 21.
In a particular cell, molecule X binds to an enzyme at the active site causing it to stop
catalyzing reactions. Molecules X is called what?

Correct Answer: competitive inhibitor


Question 22.
A particular lipid is solid at room temperature, so it is called:

Correct Answer: fat