Biochemistry Final Exam with Questions & 100% Correct Answers |Passed with A+ Grade
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Course
Biochemistry
Institution
Biochemistry
Which elements are found in simple carbohydrates?
A. Carbon, hydrogen and oxygen
B. Carbon, hydrogen, oxygen and nitrogen
C. Carbon, Hydrogen, oxygen and phosphorous
D. Carbon, Hydrogen, oxygen and sulfur
E. None of the above - A. Carbon, hydrogen and oxygen
Entropy is used to measure _____.
...
Biochemistry Final Exam with
Questions & 100% Correct Answers
|Passed with A+ Grade
Which elements are found in simple carbohydrates?
A. Carbon, hydrogen and oxygen
B. Carbon, hydrogen, oxygen and nitrogen
C. Carbon, Hydrogen, oxygen and phosphorous
D. Carbon, Hydrogen, oxygen and sulfur
E. None of the above - ✔✔A. Carbon, hydrogen and oxygen
Entropy is used to measure _____.
A. Free energy
B. Heat content
C. Temperature
D. Randomness
E. All of the above - ✔✔D. Randomness
,A spontaneous process always has _____.
A.ΔG<0
B.ΔG>0
C.ΔH<0
D.ΔH>0
E. none of the above - ✔✔A. ΔG < 0
Which of the following molecules contains the most oxidized form of carbon?
A. Ethylene
B. Ethanol
C. Carbon dioxide
D. Acetaldehyde
E. Acetic Acid - ✔✔C. Carbon dioxide
Photosynthetic organisms use energy from the sun to reduce _____ to _____
A. Formaldehyde ; ethanol
B. CO2 ; ethanol
C. CO2 ; carbohydrates
D. CO2 ; oxygen
E. None of the above - ✔✔C. CO2 ; carbohydrates
The O—H bonds in a water molecule are not linear because
A. A bent arrangement allows water molecules to pack tightly together
B. Oxygen's electron pairs have a tetrahedral arrangement
C. Hydrogen bonding distorts the linear geometry of a water molecule
,D. An oxygen atom is much more electronegative than a hydrogen atom - ✔✔oxygen's electron
pairs have a tetrahedral arrangement.
With which substance can a water molecule form hydrogen bonds?
A. methane (CH4)
B. methanol (CH3OH)
C. chloride ions (Cl-)
D. hydrogen gas (H2) - ✔✔B. methanol (CH3OH)
Choose the correct listing of interactions from weakest to strongest:
A. van der Waals interactions, Hydrogen bonds, ionic interactions
B. Hydrogen bonds, van der Waals interactions, ionic interactions
C. Ionic interactions, hydrogen bonds, van der Waals interactions
D. Van der Waals interactions, ionic interactions, hydrogen bonds - ✔✔A. Van der Waals
interactions, hydrogen bonds, ionic interactions
What substance is least soluble in water?
A. CH3CH2CH3
B. Ca2+
C. NH3
D. CH3CH2OH - ✔✔A. CH3CH2CH3
Nonpolar molecules separate from water because
A. Water molecules tend to form micelles
B. Separation maximizes the entropy of water molecules
, C. The nonpolar molecules are attracted to each other
D. Hydrogen bonding is strongest among nonpolar groups - ✔✔B. Separation maximizes the
entropy of water molecules
Which is more soluble in water: hexane (C6H14) or hexanol (C6H13OH)?
A. Hexanol, because it is more hydrophilic
B. Hexane, because it is more hydrophobic
C. Hexane, because it is more hydrophilic
D. Hexanol, because it is more hydrophobic - ✔✔A. Hexanol, because it is more hydrophilic
In a micelle,
A. non polar tails form hydrogen bonds with each other
B. Water molecules are trapped between the non polar
tails C. Two sheets of amphiphilic molecules form a bilayer
D. Polar head groups interact with water molecules - ✔✔D. Polar head groups interact with
water molecules
Which substance can diffuse most easily through a lipid bilayer?
A. CO2
B. Glucose
C. A protein
D. Na+ - ✔✔A. CO2
What is the pH of 500 mL of water after the addition of 50 mL of 25 mM HCl?
A. 2.9
B. 2.3
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