CHEM 210 Biochemistry – Complete Exam Bank
(NEW VERSION)| Modules 1–8 & Final Exam |
300+ Questions & Answers LATEST UPDATE
THIS YEAR-JUST RELEASED.pdf
MODULE 1: INTRODUCTION TO BIOCHEMISTRY & FUNCTIONAL GROUPS
1. Biochemistry is the study of:
A) The physical properties of matter
B) The chemical processes within and relating to living organisms
C) The structure of inorganic compounds
D) The laws of thermodynamics only
Answer: B
Biochemistry focuses on the chemical processes that occur in living organisms,
including the structure and function of biomolecules.
2. Which element is most abundant in living organisms by mass?
A) Carbon
B) Hydrogen
,C) Nitrogen
D) Oxygen
Answer: D
Oxygen is the most abundant element in living organisms by mass, followed by
carbon, hydrogen, and nitrogen.
3. The four most abundant elements in living organisms are:
A) Carbon, hydrogen, nitrogen, sulfur
B) Carbon, hydrogen, oxygen, nitrogen
C) Carbon, oxygen, phosphorus, sulfur
D) Hydrogen, oxygen, nitrogen, phosphorus
Answer: B
The four most abundant elements in living organisms are carbon, hydrogen,
oxygen, and nitrogen. These elements make up approximately 96% of the human
body mass.
4. The six most abundant elements in the human body are:
A) C, H, O, N, P, S
B) C, H, O, N, Ca, K
C) C, H, O, N, S, Fe
D) C, H, O, N, P, Ca
Answer: A
,The six most abundant elements in the human body are carbon, hydrogen,
oxygen, nitrogen, phosphorus, and sulfur (CHONPS).
5. Which of the following functional groups is found in carbohydrates?
A) Esters
B) Thiols
C) Carboxylic acids
D) Alcohols
E) Amines
Answer: D
Alcohols (hydroxyl groups, -OH) are the primary functional groups found in
carbohydrates. Carbohydrates are polyhydroxy aldehydes or ketones.
6. Which functional group is characterized by a carbon double-bonded to
oxygen and single-bonded to another carbon?
A) Alcohol
B) Carboxylic acid
C) Ketone
D) Aldehyde
E) Ester
Answer: C
, A ketone has a carbonyl group (C=O) bonded to two carbon atoms. Ketones are
found in carbohydrates such as fructose.
7. Which functional group contains a sulfur atom?
A) Alcohol
B) Thiol
C) Ether
D) Ketone
E) Aldehyde
Answer: B
Thiols contain a sulfur atom bonded to hydrogen (-SH). They are found in the
amino acid cysteine.
8. Which functional group is a carboxylic acid?
A) R-COOH
B) R-OH
C) R-NH₂
D) R-SH
E) R-O-R
Answer: A
Carboxylic acids contain the carboxyl group (-COOH), which consists of a carbonyl
and a hydroxyl group.
(NEW VERSION)| Modules 1–8 & Final Exam |
300+ Questions & Answers LATEST UPDATE
THIS YEAR-JUST RELEASED.pdf
MODULE 1: INTRODUCTION TO BIOCHEMISTRY & FUNCTIONAL GROUPS
1. Biochemistry is the study of:
A) The physical properties of matter
B) The chemical processes within and relating to living organisms
C) The structure of inorganic compounds
D) The laws of thermodynamics only
Answer: B
Biochemistry focuses on the chemical processes that occur in living organisms,
including the structure and function of biomolecules.
2. Which element is most abundant in living organisms by mass?
A) Carbon
B) Hydrogen
,C) Nitrogen
D) Oxygen
Answer: D
Oxygen is the most abundant element in living organisms by mass, followed by
carbon, hydrogen, and nitrogen.
3. The four most abundant elements in living organisms are:
A) Carbon, hydrogen, nitrogen, sulfur
B) Carbon, hydrogen, oxygen, nitrogen
C) Carbon, oxygen, phosphorus, sulfur
D) Hydrogen, oxygen, nitrogen, phosphorus
Answer: B
The four most abundant elements in living organisms are carbon, hydrogen,
oxygen, and nitrogen. These elements make up approximately 96% of the human
body mass.
4. The six most abundant elements in the human body are:
A) C, H, O, N, P, S
B) C, H, O, N, Ca, K
C) C, H, O, N, S, Fe
D) C, H, O, N, P, Ca
Answer: A
,The six most abundant elements in the human body are carbon, hydrogen,
oxygen, nitrogen, phosphorus, and sulfur (CHONPS).
5. Which of the following functional groups is found in carbohydrates?
A) Esters
B) Thiols
C) Carboxylic acids
D) Alcohols
E) Amines
Answer: D
Alcohols (hydroxyl groups, -OH) are the primary functional groups found in
carbohydrates. Carbohydrates are polyhydroxy aldehydes or ketones.
6. Which functional group is characterized by a carbon double-bonded to
oxygen and single-bonded to another carbon?
A) Alcohol
B) Carboxylic acid
C) Ketone
D) Aldehyde
E) Ester
Answer: C
, A ketone has a carbonyl group (C=O) bonded to two carbon atoms. Ketones are
found in carbohydrates such as fructose.
7. Which functional group contains a sulfur atom?
A) Alcohol
B) Thiol
C) Ether
D) Ketone
E) Aldehyde
Answer: B
Thiols contain a sulfur atom bonded to hydrogen (-SH). They are found in the
amino acid cysteine.
8. Which functional group is a carboxylic acid?
A) R-COOH
B) R-OH
C) R-NH₂
D) R-SH
E) R-O-R
Answer: A
Carboxylic acids contain the carboxyl group (-COOH), which consists of a carbonyl
and a hydroxyl group.
