BIOL 1408 Lab Practical Exam 2026/2027 | Complete Practice
Questions, Correct Answers & Detailed Explanations
Section I — Laboratory Safety, Scientific Method & Lab Skills
1.
Which item is most appropriate for protecting the eyes during a BIOL
1408 laboratory?
A. Face mask
B. Safety goggles
C. Apron
D. Gloves
Correct Answer: B. Safety goggles
Explanation: Safety goggles protect the eyes from chemical splashes,
biological materials, and broken glass.
2.
If a chemical splashes into your eye, what should you do first?
A. Wipe the eye with a towel
B. Close the eye tightly
C. Immediately flush with water at the eyewash station
D. Wait for the instructor
Correct Answer: C. Immediately flush with water at the eyewash
station
Explanation: Immediate irrigation helps remove the chemical and
reduce tissue damage.
,3.
Why should long hair be tied back during laboratory activities?
A. To improve concentration
B. To prevent contamination only
C. To prevent contact with flames, chemicals, or equipment
D. To make microscopy easier
Correct Answer: C. To prevent contact with flames, chemicals, or
equipment
Explanation: Loose hair can catch fire or become entangled in
laboratory equipment.
4.
Which action is generally prohibited in a biology laboratory?
A. Wearing goggles
B. Labeling specimens
C. Eating or drinking
D. Recording observations
Correct Answer: C. Eating or drinking
Explanation: Food and drinks can become contaminated with
laboratory chemicals or biological materials.
5.
What is the purpose of a control group in an experiment?
A. To receive every treatment
B. To provide a comparison with the experimental group
C. To eliminate all variables
D. To guarantee the hypothesis is correct
,Correct Answer: B. To provide a comparison with the experimental
group
Explanation: A control provides a baseline against which experimental
results can be compared.
6.
The variable intentionally changed by a researcher is the:
A. Dependent variable
B. Controlled variable
C. Independent variable
D. Constant
Correct Answer: C. Independent variable
Explanation: The independent variable is deliberately manipulated by
the researcher.
7.
The variable measured in an experiment is the:
A. Independent variable
B. Dependent variable
C. Control
D. Constant
Correct Answer: B. Dependent variable
Explanation: The dependent variable changes in response to the
independent variable and is measured.
8.
A hypothesis should be:
, A. Impossible to test
B. A testable explanation or prediction
C. Always proven correct
D. Based only on personal opinion
Correct Answer: B. A testable explanation or prediction
Explanation: Scientific hypotheses must be testable and potentially
falsifiable.
9.
Which instrument is commonly used to measure liquid volume
accurately in a biology laboratory?
A. Balance
B. Graduated cylinder
C. Microscope
D. Thermometer
Correct Answer: B. Graduated cylinder
Explanation: Graduated cylinders are designed to measure liquid
volumes.
10.
What does a balance measure?
A. Temperature
B. Mass
C. Volume
D. pH
Correct Answer: B. Mass
Explanation: A laboratory balance measures mass, usually in grams.
Questions, Correct Answers & Detailed Explanations
Section I — Laboratory Safety, Scientific Method & Lab Skills
1.
Which item is most appropriate for protecting the eyes during a BIOL
1408 laboratory?
A. Face mask
B. Safety goggles
C. Apron
D. Gloves
Correct Answer: B. Safety goggles
Explanation: Safety goggles protect the eyes from chemical splashes,
biological materials, and broken glass.
2.
If a chemical splashes into your eye, what should you do first?
A. Wipe the eye with a towel
B. Close the eye tightly
C. Immediately flush with water at the eyewash station
D. Wait for the instructor
Correct Answer: C. Immediately flush with water at the eyewash
station
Explanation: Immediate irrigation helps remove the chemical and
reduce tissue damage.
,3.
Why should long hair be tied back during laboratory activities?
A. To improve concentration
B. To prevent contamination only
C. To prevent contact with flames, chemicals, or equipment
D. To make microscopy easier
Correct Answer: C. To prevent contact with flames, chemicals, or
equipment
Explanation: Loose hair can catch fire or become entangled in
laboratory equipment.
4.
Which action is generally prohibited in a biology laboratory?
A. Wearing goggles
B. Labeling specimens
C. Eating or drinking
D. Recording observations
Correct Answer: C. Eating or drinking
Explanation: Food and drinks can become contaminated with
laboratory chemicals or biological materials.
5.
What is the purpose of a control group in an experiment?
A. To receive every treatment
B. To provide a comparison with the experimental group
C. To eliminate all variables
D. To guarantee the hypothesis is correct
,Correct Answer: B. To provide a comparison with the experimental
group
Explanation: A control provides a baseline against which experimental
results can be compared.
6.
The variable intentionally changed by a researcher is the:
A. Dependent variable
B. Controlled variable
C. Independent variable
D. Constant
Correct Answer: C. Independent variable
Explanation: The independent variable is deliberately manipulated by
the researcher.
7.
The variable measured in an experiment is the:
A. Independent variable
B. Dependent variable
C. Control
D. Constant
Correct Answer: B. Dependent variable
Explanation: The dependent variable changes in response to the
independent variable and is measured.
8.
A hypothesis should be:
, A. Impossible to test
B. A testable explanation or prediction
C. Always proven correct
D. Based only on personal opinion
Correct Answer: B. A testable explanation or prediction
Explanation: Scientific hypotheses must be testable and potentially
falsifiable.
9.
Which instrument is commonly used to measure liquid volume
accurately in a biology laboratory?
A. Balance
B. Graduated cylinder
C. Microscope
D. Thermometer
Correct Answer: B. Graduated cylinder
Explanation: Graduated cylinders are designed to measure liquid
volumes.
10.
What does a balance measure?
A. Temperature
B. Mass
C. Volume
D. pH
Correct Answer: B. Mass
Explanation: A laboratory balance measures mass, usually in grams.
