BIOL 1201 HIGH-YIELD EXAM
PREPARATION
QUESTIONS WITH ANSWERS AND
RATIONALES
Scientific Method
Question 1
Which step of the scientific method involves making a testable explanation for an observation?
A. Observation
B. Hypothesis
C. Experiment
D. Conclusion
Answer: B. Hypothesis
Rationale: A hypothesis is a tentative, testable explanation for observed phenomena. Observations
identify a phenomenon, experiments test the hypothesis, and conclusions interpret results.
Question 2
What is the independent variable in an experiment?
A. The measured outcome
B. The factor being manipulated
C. The control group
D. The conclusion
Answer: B. The factor being manipulated
Rationale: The independent variable is intentionally changed by the researcher to determine its effect
on the dependent variable.
Question 3
,Why is a control group important?
A. It increases sample size
B. It eliminates all error
C. It provides a baseline for comparison
D. It proves the hypothesis
Answer: C. It provides a baseline for comparison
Rationale: Control groups allow researchers to determine whether observed effects are due to the
treatment.
Question 4
A scientific theory is:
A. A guess
B. An untested idea
C. A well-supported explanation based on evidence
D. A fact
Answer: C
Rationale: Scientific theories are supported by extensive evidence and testing.
Chemistry of Life
Question 5
What property of water allows it to moderate temperature?
A. Polarity
B. High specific heat
C. Adhesion
D. Cohesion
Answer: B
Rationale: Water absorbs large amounts of heat before changing temperature due to its high specific
heat.
Question 6
, The atomic number of an element equals:
A. Protons + neutrons
B. Electrons + neutrons
C. Number of protons
D. Total mass
Answer: C
Rationale: Atomic number is defined as the number of protons in the nucleus.
Question 7
Which bond involves sharing electrons?
A. Ionic
B. Hydrogen
C. Covalent
D. Van der Waals
Answer: C
Rationale: Covalent bonds form when atoms share electron pairs.
Question 8
Which macromolecule stores genetic information?
A. Protein
B. Lipid
C. Carbohydrate
D. Nucleic acid
Answer: D
Rationale: DNA and RNA are nucleic acids responsible for genetic information storage.
Cell Structure & Function
Question 9
Which organelle is known as the "powerhouse" of the cell?
PREPARATION
QUESTIONS WITH ANSWERS AND
RATIONALES
Scientific Method
Question 1
Which step of the scientific method involves making a testable explanation for an observation?
A. Observation
B. Hypothesis
C. Experiment
D. Conclusion
Answer: B. Hypothesis
Rationale: A hypothesis is a tentative, testable explanation for observed phenomena. Observations
identify a phenomenon, experiments test the hypothesis, and conclusions interpret results.
Question 2
What is the independent variable in an experiment?
A. The measured outcome
B. The factor being manipulated
C. The control group
D. The conclusion
Answer: B. The factor being manipulated
Rationale: The independent variable is intentionally changed by the researcher to determine its effect
on the dependent variable.
Question 3
,Why is a control group important?
A. It increases sample size
B. It eliminates all error
C. It provides a baseline for comparison
D. It proves the hypothesis
Answer: C. It provides a baseline for comparison
Rationale: Control groups allow researchers to determine whether observed effects are due to the
treatment.
Question 4
A scientific theory is:
A. A guess
B. An untested idea
C. A well-supported explanation based on evidence
D. A fact
Answer: C
Rationale: Scientific theories are supported by extensive evidence and testing.
Chemistry of Life
Question 5
What property of water allows it to moderate temperature?
A. Polarity
B. High specific heat
C. Adhesion
D. Cohesion
Answer: B
Rationale: Water absorbs large amounts of heat before changing temperature due to its high specific
heat.
Question 6
, The atomic number of an element equals:
A. Protons + neutrons
B. Electrons + neutrons
C. Number of protons
D. Total mass
Answer: C
Rationale: Atomic number is defined as the number of protons in the nucleus.
Question 7
Which bond involves sharing electrons?
A. Ionic
B. Hydrogen
C. Covalent
D. Van der Waals
Answer: C
Rationale: Covalent bonds form when atoms share electron pairs.
Question 8
Which macromolecule stores genetic information?
A. Protein
B. Lipid
C. Carbohydrate
D. Nucleic acid
Answer: D
Rationale: DNA and RNA are nucleic acids responsible for genetic information storage.
Cell Structure & Function
Question 9
Which organelle is known as the "powerhouse" of the cell?
