Question 1
3 / 3 pts
True or False: Nitrogen is called the superglue of the chemical world.
FALSE
Question 2
3 / 3 pts
True or False: Large elements, such as strontium, are common in biomolecules.
FALSE
Question
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Question 1
3 / 3 pts
True or False: Nitrogen is called the superglue of the chemical world.
FALSE
Question 2
3 / 3 pts
True or False: Large elements, such as strontium, are common in biomolecules.
FALSE
Question 3
3 / 3 pts
True or False: The time it takes for a compound to flow through a metabolic pathway is
called the payoff phase.
FALSE
Question 4
3 / 3 pts
True or False: Proteins, carbohydrates, and fats all get broken down into acetyl-CoA.
TRUE
Question 5
3 / 3 pts
True or False: A fat is a lipid molecule that is a solid at room temperature.
TRUE
Question 6
3 / 3 pts
In DNA, guanine always pairs with ________.
Thymine
Guanine
Uracil
Cytosine
Both A and B
CYTOSINE
Question 7
3 / 3 pts
Water is considered a polar solvent due to attractive forces known as hydrogen bonds.
A hydrogen bond is __________.
A bond that is stronger than a covalent bond
An attractive force between molecules where partially positive hydrogen atoms are
attracted to partially negative atoms of F, O, or N.
The polar O–H bond in water
An ionic bond between H and another atom
A covalent bond between H and O
AN ATTRACTIVE FORCE BETWEEN MOLECULES WHERE PARTIALLY POSITIVE
HYDROGEN ATOMS ARE ATTRACTED TO PARTIALLY NEGATIVE F, O, OR N
Question 8
3 / 3 pts
Which of the following is the structure of ADP?
B
Question 9
3 / 3 pts
Water is a unique molecule. Which of the following contributes to water’s unique place
in the chemical world?
The geometry of the molecule
The polarity of the O-H bonds
The ability of water molecules to hydrogen bond
The bond angle of water
All of the answers are correct
ALL ANSWERS ARE CORRECT
Question 10
3 / 3 pts
Scientific Calculator
The H+ concentration of a solution is 7.9 x 10-13 M. What is the pH?
-6.70
6.70
11.17
-12.1
12.1
12.1
[ [H+]=7.9 x 10-13; pH=-log[7.9 x 10-13]= 12.1]
Question 11
3 / 3 pts
Which of the following is the enthalpy change of a reaction?
A) ΔG
B) ΔS
C) ΔH
D) ΔF
E) None of the above
C
Question 12
3 / 3 pts
The following is what type of protein secondary structure?
Alpha helix
Beta turn
Parallel beta sheet
Anti-parallel beta sheet
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