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Quiz Chapter 1: Introduction to Biology and Laboratory Rules

10 questions · Form 4 Biology Bab 1: Introduction to Biology and Laboratory Rules

10 questions · plays in fullscreen

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. Why are open-toed sandals strictly prohibited inside a biology laboratory?

  1. A. They reduce walking speed during emergency evacuation
  2. B. They do not protect feet from chemical spills and dropped glassware
  3. C. They generate static electricity that ignites gas burners
  4. D. They interfere with maintaining clean room humidity
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Answer: B

Enclosed footwear shields feet against falling equipment, broken glass, and corrosive or biohazardous liquid spills.

2. If a student accidentally splashes a chemical solution into their eye, what immediate action should be taken inside the lab?

  1. A. Wipe eyes vigorously with paper towels
  2. B. Apply hand sanitizer directly to eyelids
  3. C. Rinse eyes thoroughly at the eyewash station
  4. D. Wait for the experiment to end before seeking help
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Answer: C

The eyewash station provides an immediate continuous water stream to flush out chemical or biological contaminants from the eyes.

3. Liquid culture media containing bacteria (Category D waste) must be treated with which method prior to final liquid disposal?

  1. A. Dehydration in an oven
  2. B. Autoclaving or chemical disinfection
  3. C. Direct discharge into storm drains
  4. D. Freezing overnight in a conventional freezer
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Answer: B

Category D liquid waste must be autoclaved or treated with chemical disinfectants before disposal.

4. What is the key difference between a Fume Hood and a Laminar Flow Cabinet?

  1. A. Fume Hoods protect the worker from fumes; Laminar Flow Cabinets protect samples from contamination.
  2. B. Fume Hoods heat samples; Laminar Flow Cabinets freeze samples.
  3. C. Fume Hoods are used for animal dissections; Laminar Flow Cabinets are used for sharp tools.
  4. D. Fume Hoods discard solid waste; Laminar Flow Cabinets recycle plastic waste.
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Answer: A

Fume Hoods protect the user from volatile chemicals, while Laminar Flow Cabinets provide sterile filtered air to protect samples from airborne contamination.

5. A researcher is studying the molecular structure and chemical processes within plant cells. Which two biological fields are being applied?

  1. A. Zoology and Ecology
  2. B. Botany and Biochemistry
  3. C. Genetics and Anatomy
  4. D. Microbiology and Physiology
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Answer: B

Botany deals with plant life, while biochemistry focuses on chemical processes within cells.

6. Which axis on a line graph should represent the responding variable?

  1. A. X-axis (Horizontal axis)
  2. B. Y-axis (Vertical axis)
  3. C. Z-axis (3D depth axis)
  4. D. Either X-axis or Y-axis interchangeably
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Answer: B

In standard scientific data representation, the responding variable is plotted on the vertical Y-axis.

7. An animal carcass used during a dissection experiment belongs to which category of biological waste?

  1. A. Category A
  2. B. Category D
  3. C. Category C
  4. D. Category B
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Answer: C

Category C waste includes animal carcasses, tissues, and viscera from experimental work.

8. What is the primary function of a Biological Safety Cabinet (BSC)?

  1. A. To cool down chemical reagents to sub-zero temperatures
  2. B. To provide a safe enclosure for manipulating infectious pathogens
  3. C. To sterilize metal inoculation loops using a naked gas flame
  4. D. To wash large hazardous chemical splashes off lab workers
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Answer: B

Biological Safety Cabinets contain filtered air streams protecting users and environment from biohazardous microbes.

9. Formulating a testable statement that explains an observed biological phenomenon is known as:

  1. A. Formulating a hypothesis
  2. B. Writing a conclusion
  3. C. Data analysis
  4. D. Problem identification
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Answer: A

A hypothesis is a proposed, testable explanation for a scientific question or observation.

10. A student measures plant growth over 14 days under constant temperature and light intensity. What is light intensity in this setup?

  1. A. Responding variable
  2. B. Manipulated variable
  3. C. Fixed variable
  4. D. Experimental error
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Answer: C

Parameters kept constant throughout the experiment (like light intensity here) are fixed variables.

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