Laboratory Instruments and Equipment
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Questions and Answers

What is the primary purpose of a laboratory room?

  • To store chemicals safely for long-term use.
  • To provide a place for relaxation and study.
  • To conduct scientific research and experiments. (correct)
  • To hold administrative meetings and discussions.

    • Which of the following is NOT a preventive measure to be taken inside a laboratory room?

  • Eating snacks during experiments (correct)
  • Tying back long hair
  • Wearing safety goggles
  • Washing hands after handling chemicals

    • Which of the following correctly describes prokaryotic cells?

  • They are complex cells with a membrane-bound nucleus.
  • They are simple, single-celled organisms without organelles. (correct)
  • They contain DNA within a membrane-enclosed nucleus.
  • They lack a defined nucleus and are generally larger.

    • What is a recommended safety practice when working in a laboratory?

    <p>Keeping your hands away from your face. (C)</p> Signup and view all the answers

    What safety equipment should one be aware of in a laboratory?

    <p>First aid kit and fire blanket (C)</p> Signup and view all the answers

    Which characteristic differentiates eukaryotic cells from prokaryotic cells?

    <p>Eukaryotic cells have a membrane-bound nucleus. (D)</p> Signup and view all the answers

    What should a lab worker do if a spill or accident occurs?

    <p>Notify the teacher or supervisor immediately. (A)</p> Signup and view all the answers

    What type of signs are commonly used in laboratories to convey safety information?

    <p>Standardized safety symbols and instructions (D)</p> Signup and view all the answers

    What is the primary distinction between prokaryotic and eukaryotic cells?

    <p>Prokaryotic cells lack membrane-bound organelles. (A)</p> Signup and view all the answers

    Which of the following statements about eukaryotic cells is correct?

    <p>Eukaryotic cells can be either unicellular or multicellular. (B)</p> Signup and view all the answers

    What type of organisms can be classified as eukaryotes?

    <p>Microorganisms and multicellular organisms like animals and fungi. (A)</p> Signup and view all the answers

    Which of the following is NOT a characteristic of prokaryotic cells?

    <p>Presence of histones in DNA. (D)</p> Signup and view all the answers

    What structure do eukaryotic cells possess that distinguishes them from prokaryotic cells?

    <p>Mitochondria. (A)</p> Signup and view all the answers

    What is the size range commonly associated with eukaryotic cells?

    <p>10–100 µm. (A)</p> Signup and view all the answers

    What component is found in the cell walls of fungi but NOT in bacteria?

    <p>Chitin. (A)</p> Signup and view all the answers

    Which type of cell division is characteristic of eukaryotic cells?

    <p>Mitosis/meiosis. (D)</p> Signup and view all the answers

    Flashcards

    Laboratory Room

    A controlled environment for scientific research and experiments.

    Preventive Measures in Lab

    Safety practices to follow in a laboratory to avoid accidents.

    Wear Safety Goggles

    Protective eyewear to shield eyes from hazards like chemicals.

    Wash Hands After Handling Chemicals

    Important to clean hands with soap after lab work involving chemicals.

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    Prokaryotes

    Simple, single-celled organisms without a membrane-bound nucleus.

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    Eukaryotes

    Complex cells with a defined nucleus containing genetic material.

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    Lab Safety Signs

    Standardized symbols that communicate safety information in labs.

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    Microscopy

    The use of microscopes to view small organisms like bacteria.

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    Mitochondria

    Membrane-bound organelles responsible for energy production in eukaryotic cells.

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    Endoplasmic Reticulum

    A network of membranes involved in protein and lipid synthesis in eukaryotic cells.

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    Golgi Apparatus

    An organelle that modifies, sorts, and packages proteins and lipids for secretion or use.

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    Prokaryotic Cells

    Cells without a membrane-bound nucleus and organelles, generally smaller than eukaryotic cells.

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    Eukaryotic Cells

    Cells that have a membrane-bound nucleus and organelles, larger and more complex than prokaryotic cells.

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    Bacteria

    Single-celled prokaryotic microorganisms that can be free-living or parasitic.

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    Cell Wall

    A rigid structure that surrounds the cell membrane in bacteria, plants, and fungi.

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    Microbiology

    The study of microscopic organisms, including bacteria, fungi, and viruses.

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    Study Notes

    Laboratory Room

    • A laboratory room is a controlled environment for scientific research, experiments, analysis, and measurements.
    • It includes specialized tools, instruments, and safety equipment.
    • Researchers, scientists, and technicians use the room to conduct experiments accurately and safely.

    Laboratory Instruments

    • Bunsen burner: A gas burner used for heating in laboratories.
    • Evaporating dish: A shallow, often round, dish used for evaporating liquids.
    • Bacterial loop: A tool used to transfer small amounts of bacteria or other biological samples.
    • Wire brush: A tool used for cleaning lab equipment.
    • Crucible and cover: A container for high-temperature processes, often used in chemistry.
    • 24-well plate: A plate with multiple small wells, typically used for small-scale experiments or assays.
    • Test-tube rack: A rack for holding test tubes.
    • Mortar and pestle: Used for grinding substances into a fine powder.
    • Lab burner: A gas burner used in experiments, typically with a variable flame height for controlling temperature.
    • Forceps: Used for handling small samples or delicate objects.
    • Wash bottle: A bottle with a nozzle for dispensing liquids, used to wash laboratory equipment.
    • Pipet: A laboratory tool used to measure and transfer small volumes of liquid.
    • Graduated cylinder: Used to measure liquid volumes accurately.
    • Volumetric flask: Used to prepare specific volumes of solutions.
    • Conical flask: Used for mixing, heating, and storing liquids.
    • Watch glass: A shallow, circular glass used for covering beakers or evaporating substances.
    • Funnel: Used for pouring liquids into containers with small openings.
    • Dropper/pipette: Used to transfer small amounts of liquid.
    • Petri dish: A shallow dish used to culture microorganisms.

    Laboratory Safety Precautions

    • Always follow instructions carefully.
    • Wear appropriate safety equipment, like safety goggles.
    • Notify your teacher if there are spills or accidents.
    • Wash your hands after handling chemicals.
    • Keep hands away from face during experiments.
    • Tie back hair and roll up sleeves.
    • Know the location of fire extinguishers, first aid kits, eyewash stations, and other safety equipment.
    • Keep work areas clear of clutter.
    • Do not eat or drink in the laboratory.
    • Wear safety glasses or goggles when doing experiments.
    • Ensure you know the location of fire extinguishers, eyewash fountains, and emergency exits.

    Microbiology

    • Microbiology is the study of microscopic organisms.

    • It includes cells that are either unicellular (Bacteria), multicellular (fungi), or acellular (virus)

    • Prokaryotic cells: These are simple, single-celled organisms that lack a membrane-bound nucleus and have their genetic material (DNA) in a region called the nucleoid.

    • Eukaryotic cells: More complex; have a defined membrane-bound nucleus and membrane-bound organelles. Examples include mitochondria, the endoplasmic reticulum, and the Golgi apparatus.

    • Bacteria are single-celled organisms which can exist independently or as parasites.

    • Bacteria can be in different shapes, including coccus, coccobacillus, vibrio, bacillus, spirillum, and spirochete.

    • Bacteria can form various aggregations or structures.

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    Related Documents

    Laboratory Techniques 1-2 PDF

    Description

    Explore the essential instruments and tools used in laboratory settings. This quiz covers various laboratory equipment, their functions, and safety measures in scientific research. Perfect for students and professionals looking to refresh their knowledge on laboratory operations.

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