CHEM 210 BIOCHEMISTRY MODULE 1 TO 8
EXAMS' & FINAL EXAM QUESTIONS AND
CORRECT ANSWERS WITH RATIONALES
GRADED A+ LATEST
TABLE OF CONTENTS
Module 1 Exam …………………... 02
Module 2 Exam …………………... 20
Module 3 Exam …………………... 40
Module 4 Exam …………………... 55
Module 5 Exam …………………... 70
Module 6 Exam …………………... 90
Module 7 Exam …………………... 105
Module 8 Exam …………………... 120
Final Exam ………………….......... 154
,CHEM 210 - MODULE 1 EXAM
1. Which of the following best describes a chiral carbon?
A. A carbon atom with four identical substituents
B. A carbon atom with two identical substituents
C. A carbon atom with four different substituents
D. A carbon atom double-bonded to oxygen
E. A carbon atom in an aromatic ring
Correct Answer: C
Rationale: A chiral carbon is bonded to four different substituents, producing non-
superimposable mirror images.
2. Which functional group is characteristic of amino acids?
A. Aldehyde
B. Carboxyl and amino
C. Ketone
D. Ester
E. Ether
Correct Answer: B
Rationale: Amino acids contain both an amino (-NH₂) and carboxyl (-COOH)
group.
3. Which of the following is NOT a monosaccharide?
A. Glucose
B. Fructose
C. Ribose
D. Sucrose
E. Galactose
Correct Answer: D
Rationale: Sucrose is a disaccharide composed of glucose and fructose.
,4. What type of bond forms between two amino acids?
A. Hydrogen bond
B. Ionic bond
C. Peptide bond
D. Glycosidic bond
E. Phosphodiester bond
Correct Answer: C
Rationale: Amino acids link through peptide bonds between the carboxyl group of
one and amino group of another.
5. Which property is responsible for water’s high heat capacity?
A. Nonpolar nature
B. Hydrogen bonding
C. Ionic bonding
D. High molecular weight
E. Covalent bonding
Correct Answer: B
Rationale: Hydrogen bonds allow water to absorb and release heat without large
temperature changes.
6. A solution with pH 3 is how many times more acidic than pH 6?
A. 3 times
B. 10 times
C. 100 times
D. 1,000 times
E. 10,000 times
Correct Answer: D
Rationale: Each pH unit is 10×; 3 units difference = 10³ = 1,000.
, 7. Which statement best describes a buffer?
A. A strong acid solution
B. A strong base solution
C. A solution that resists changes in pH
D. A solution with only water
E. A solution that only contains salts
Correct Answer: C
Rationale: Buffers neutralize added acids or bases to maintain stable pH.
8. Which of the following is the correct formula for a peptide bond?
A. C–N
B. C=O
C. N–H
D. O–H
E. C–O
Correct Answer: A
Rationale: A peptide bond is a covalent bond between carbon and nitrogen.
9. Which bond is strongest in a protein’s tertiary structure?
A. Hydrogen bond
B. Ionic bond
C. Disulfide bond
D. Van der Waals forces
E. Hydrophobic interactions
Correct Answer: C
Rationale: Disulfide bonds are covalent and provide strong stabilization.
10. Which molecule is a nucleotide?
A. Glucose
B. ATP
C. Lactose
D. Glycogen
EXAMS' & FINAL EXAM QUESTIONS AND
CORRECT ANSWERS WITH RATIONALES
GRADED A+ LATEST
TABLE OF CONTENTS
Module 1 Exam …………………... 02
Module 2 Exam …………………... 20
Module 3 Exam …………………... 40
Module 4 Exam …………………... 55
Module 5 Exam …………………... 70
Module 6 Exam …………………... 90
Module 7 Exam …………………... 105
Module 8 Exam …………………... 120
Final Exam ………………….......... 154
,CHEM 210 - MODULE 1 EXAM
1. Which of the following best describes a chiral carbon?
A. A carbon atom with four identical substituents
B. A carbon atom with two identical substituents
C. A carbon atom with four different substituents
D. A carbon atom double-bonded to oxygen
E. A carbon atom in an aromatic ring
Correct Answer: C
Rationale: A chiral carbon is bonded to four different substituents, producing non-
superimposable mirror images.
2. Which functional group is characteristic of amino acids?
A. Aldehyde
B. Carboxyl and amino
C. Ketone
D. Ester
E. Ether
Correct Answer: B
Rationale: Amino acids contain both an amino (-NH₂) and carboxyl (-COOH)
group.
3. Which of the following is NOT a monosaccharide?
A. Glucose
B. Fructose
C. Ribose
D. Sucrose
E. Galactose
Correct Answer: D
Rationale: Sucrose is a disaccharide composed of glucose and fructose.
,4. What type of bond forms between two amino acids?
A. Hydrogen bond
B. Ionic bond
C. Peptide bond
D. Glycosidic bond
E. Phosphodiester bond
Correct Answer: C
Rationale: Amino acids link through peptide bonds between the carboxyl group of
one and amino group of another.
5. Which property is responsible for water’s high heat capacity?
A. Nonpolar nature
B. Hydrogen bonding
C. Ionic bonding
D. High molecular weight
E. Covalent bonding
Correct Answer: B
Rationale: Hydrogen bonds allow water to absorb and release heat without large
temperature changes.
6. A solution with pH 3 is how many times more acidic than pH 6?
A. 3 times
B. 10 times
C. 100 times
D. 1,000 times
E. 10,000 times
Correct Answer: D
Rationale: Each pH unit is 10×; 3 units difference = 10³ = 1,000.
, 7. Which statement best describes a buffer?
A. A strong acid solution
B. A strong base solution
C. A solution that resists changes in pH
D. A solution with only water
E. A solution that only contains salts
Correct Answer: C
Rationale: Buffers neutralize added acids or bases to maintain stable pH.
8. Which of the following is the correct formula for a peptide bond?
A. C–N
B. C=O
C. N–H
D. O–H
E. C–O
Correct Answer: A
Rationale: A peptide bond is a covalent bond between carbon and nitrogen.
9. Which bond is strongest in a protein’s tertiary structure?
A. Hydrogen bond
B. Ionic bond
C. Disulfide bond
D. Van der Waals forces
E. Hydrophobic interactions
Correct Answer: C
Rationale: Disulfide bonds are covalent and provide strong stabilization.
10. Which molecule is a nucleotide?
A. Glucose
B. ATP
C. Lactose
D. Glycogen
