BIOCHEMISTRY EXAM REVIEW () Actual Questions and Answers
Expert-Verified Explanation This Exam contains:
✪ 30 Questions and Answers
✪ Multiple-choice and True/False Format
✪ Expert-Verified Explanations
✪ Verified with Trusted Textbooks
1. What are three ways that biochemists study biological organisms? A. By observing animal
behaviors, climate patterns, and soil conditions
B. By studying cell morphology, protein digestion, and human anatomy
C. By analyzing structure-function relationships, metabolism, and communication among
organisms
D. By memorizing DNA sequences, listing enzymes, and conducting interviews with organisms
Answer: C
EXPLANATION: Biochemists focus on how structure relates to function, metabolic processes, and
biochemical communication.
2. What is biochemistry? A. Study of minerals
B. The chemistry of life
C. Study of rocks and fossils
D. The study of environmental toxins
Answer: B
EXPLANATION: Biochemistry is the study of the chemical processes and substances that occur
within living organisms.
3. What is the bond angle of a tetrahedral molecular arrangement? A. 104.5 degrees
B. 120 degrees
C. 109.5 degrees
D. 180 degrees
Answer: C
EXPLANATION: A tetrahedral shape has bond angles of approximately 109.5°.
4. How many of the 90 naturally occurring elements are found in living organisms? A. About 60
B. Less than 30
C. All 90
D. Only 5
Answer: B
EXPLANATION: Fewer than 30 naturally occurring elements are essential to life.
5. Why are smaller elements favored for forming strong covalent bonds? A. They have larger
atomic nuclei
B. They form unstable bonds
C. Their small size allows stable bonding
, D. They are metallic and more reactive
Answer: C
EXPLANATION: Smaller atoms allow closer proximity and stronger covalent bonds.
6. What element is critical to all living things and found in large amounts? A. Helium
B. Nitrogen
C. Oxygen
D. Carbon
Answer: D
EXPLANATION: Carbon’s ability to form four bonds makes it essential to life.
7. What does organic chemistry primarily study? A. Non-living substances
B. Compounds containing metals
C. Carbon-based compounds
D. Nuclear reactions
Answer: C
EXPLANATION: Organic chemistry focuses on carbon-containing compounds.
8. Which of the following is a straight-chain hydrocarbon? A. Methane
B. Water
C. Carbon dioxide
D. Ammonia
Answer: A
EXPLANATION: Methane (CH4) is a simple straight-chain hydrocarbon.
9. What is the chemical formula for propane? A. C2H4
B. C3H8
C. C4H10
D. C5H12
Answer: B
EXPLANATION: Propane’s chemical formula is C3H8.
10. Which is not a valid way to draw an organic molecule? A. Condensed formula
B. Line bond formula
C. Bar graph
D. Kekulé formula
Answer: C
EXPLANATION: Bar graphs are not used in chemical structure representation.
11. What is a functional group? A. An enzyme family
B. A protein structure
C. A specific arrangement of atoms defining a compound's chemistry
D. A cell organelle
Answer: C
EXPLANATION: Functional groups determine chemical reactivity.
Expert-Verified Explanation This Exam contains:
✪ 30 Questions and Answers
✪ Multiple-choice and True/False Format
✪ Expert-Verified Explanations
✪ Verified with Trusted Textbooks
1. What are three ways that biochemists study biological organisms? A. By observing animal
behaviors, climate patterns, and soil conditions
B. By studying cell morphology, protein digestion, and human anatomy
C. By analyzing structure-function relationships, metabolism, and communication among
organisms
D. By memorizing DNA sequences, listing enzymes, and conducting interviews with organisms
Answer: C
EXPLANATION: Biochemists focus on how structure relates to function, metabolic processes, and
biochemical communication.
2. What is biochemistry? A. Study of minerals
B. The chemistry of life
C. Study of rocks and fossils
D. The study of environmental toxins
Answer: B
EXPLANATION: Biochemistry is the study of the chemical processes and substances that occur
within living organisms.
3. What is the bond angle of a tetrahedral molecular arrangement? A. 104.5 degrees
B. 120 degrees
C. 109.5 degrees
D. 180 degrees
Answer: C
EXPLANATION: A tetrahedral shape has bond angles of approximately 109.5°.
4. How many of the 90 naturally occurring elements are found in living organisms? A. About 60
B. Less than 30
C. All 90
D. Only 5
Answer: B
EXPLANATION: Fewer than 30 naturally occurring elements are essential to life.
5. Why are smaller elements favored for forming strong covalent bonds? A. They have larger
atomic nuclei
B. They form unstable bonds
C. Their small size allows stable bonding
, D. They are metallic and more reactive
Answer: C
EXPLANATION: Smaller atoms allow closer proximity and stronger covalent bonds.
6. What element is critical to all living things and found in large amounts? A. Helium
B. Nitrogen
C. Oxygen
D. Carbon
Answer: D
EXPLANATION: Carbon’s ability to form four bonds makes it essential to life.
7. What does organic chemistry primarily study? A. Non-living substances
B. Compounds containing metals
C. Carbon-based compounds
D. Nuclear reactions
Answer: C
EXPLANATION: Organic chemistry focuses on carbon-containing compounds.
8. Which of the following is a straight-chain hydrocarbon? A. Methane
B. Water
C. Carbon dioxide
D. Ammonia
Answer: A
EXPLANATION: Methane (CH4) is a simple straight-chain hydrocarbon.
9. What is the chemical formula for propane? A. C2H4
B. C3H8
C. C4H10
D. C5H12
Answer: B
EXPLANATION: Propane’s chemical formula is C3H8.
10. Which is not a valid way to draw an organic molecule? A. Condensed formula
B. Line bond formula
C. Bar graph
D. Kekulé formula
Answer: C
EXPLANATION: Bar graphs are not used in chemical structure representation.
11. What is a functional group? A. An enzyme family
B. A protein structure
C. A specific arrangement of atoms defining a compound's chemistry
D. A cell organelle
Answer: C
EXPLANATION: Functional groups determine chemical reactivity.
