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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. 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.

2. In a scientific experiment, what is the variable that is intentionally changed or manipulated by the investigator?

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

The manipulated variable is the specific factor adjusted by the researcher to test a hypothesis.

3. Which temperature and pressure settings are standard for autoclaving Category B biological waste?

  1. A. 100°C at 5 psi for 30 minutes
  2. B. 150°C at 20 psi for 5 minutes
  3. C. 121°C at 15 psi for 15 minutes
  4. D. 80°C at 10 psi for 60 minutes
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Answer: C

Standard autoclave conditions for sterilization of biohazard waste are 121°C at 15 psi pressure for 15 minutes.

4. 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.

5. 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.

6. 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.

7. When presenting scientific data in a table, what is a mandatory practice?

  1. A. Omitting measurement units from headers
  2. B. Including standard units in column headers and keeping decimal places consistent
  3. C. Writing values in Roman numerals
  4. D. Changing measurement units randomly between rows
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Answer: B

Tables must clearly list units in column headers and maintain consistent decimal places for all recorded numerical data.

8. Which field of biology specifically studies the interactions between living organisms and their environment?

  1. A. Ecology
  2. B. Physiology
  3. C. Anatomy
  4. D. Genetics
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Answer: A

Ecology is the study of interactions between living organisms and their biotic and abiotic environment.

9. 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.

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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