Portage Learning CHEM 210 Final UPDATED ACTUAL Exam Questions and CORRECT Answers

Portage Learning CHEM 210 Final
UPDATED ACTUAL Exam Questions and CORRECT Answers

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
• Water is considered a polar solvent due to attractive forces known as
hydrogen bonds. A hydrogen bond is: -✓✓an attractive force between
molecules where partially positive hydrogen atoms are attracted to partially
negative atoms of F, O, or N


Question 8.
What is a London force?

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


Question 9.
What is a dipole-dipole force?

Correct Answer: an attraction between the positive end of one polar molecule
and the negative end of another


Question 10.
What attributes contribute to water's unusual properties?

Correct Answer: 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
• What is the measure of order of the system in a reaction? -✓✓ΔS = entropy

, Question 14.
A fibrous protein is an example of a protein ___.

Correct Answer: conformation


Question 15.
What is an example of protein conformation?

Correct Answer: fibrous and globular


Question 16.
Any molecule or ion that is necessary for an enzyme's function is called:

Correct Answer: cofactor


Question 17.
In a particular cell, molecules X binds to an enzyme causing to stop catalyzing reactions.
Molecule X is called what?

Correct Answer: inhibitor


Question 18.
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 19.
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


Question 20.
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?

Correct Answer: uncompetitive inhibitor
• 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? -✓✓competitive
inhibitor