Biology Chapter: Cells and Safety in Labs

A laboratory room is a controlled environment designed for scientific research, experiments, analysis, and measurement. It is equipped with specialized instruments, tools, and safety equipment to ensure accurate and safe experimentation.

Prokaryotic cells have circular DNA without histones, while eukaryotic cells have linear DNA associated with histones.

Safety goggles protect your eyes from harmful chemicals, heated materials, and flying debris that could cause serious injury.

<p>Prokaryotic cells are typically much smaller, ranging from 1 to 10 µm in diameter, while eukaryotic cells are larger, ranging from 10 to 100 µm in diameter.</p> Signup and view all the answers

<p>A fire extinguisher and an eyewash station are crucial safety equipment that should be easily accessible in a laboratory room.</p> Signup and view all the answers

<p>Prokaryotic cells are simple, single-celled organisms without a membrane-bound nucleus or organelles. Eukaryotic cells are more complex and have a defined nucleus containing their genetic material (DNA).</p> Signup and view all the answers

<p>Prokaryotic cells use binary fission, while eukaryotic cells use mitosis and meiosis.</p> Signup and view all the answers

<p>A clean and organized work area reduces the risk of accidents, contamination, and misidentification of samples or materials.</p> Signup and view all the answers

<p>Prokaryotic cells lack membrane-bound organelles, while eukaryotic cells have various membrane-bound organelles like mitochondria, endoplasmic reticulum, and Golgi apparatus.</p> Signup and view all the answers

<p>Always follow instructions carefully, wear appropriate protective gear, and notify your teacher immediately in case of spills or accidents.</p> Signup and view all the answers

<p>Examples of prokaryotic organisms include bacteria and archaea.</p> Signup and view all the answers

<p>Eukaryotic organisms can be single-celled (protists) or multicellular (animals, plants, and fungi). They possess a nucleus and other membrane-bound organelles.</p> Signup and view all the answers

<p>Safety signs in a laboratory communicate important safety information through standardized symbols and instructions, helping to prevent hazards and ensure the safety of lab personnel and visitors.</p> Signup and view all the answers

<p>Knowing the location of emergency equipment is crucial for reacting swiftly and appropriately in case of an accident or emergency, potentially preventing serious injury.</p> Signup and view all the answers

<p>The study of microscopic organisms is called microbiology</p> Signup and view all the answers

<p>A Petri dish is a shallow, circular dish used for growing cultures in microbiology, while a laboratory glass is a general term referring to various types of glass containers used for different purposes in a lab.</p> Signup and view all the answers

<p>Free-living bacteria can exist independently, while parasitic bacteria depend on another organism for life.</p> Signup and view all the answers

<p>Bacteria are classified based on their morphology (shape) and aggregation (how they group together) observed under a light microscope.</p> Signup and view all the answers

<p>Bacteria are an example of prokaryotic organisms, while animal cells are an example of eukaryotic organisms.</p> Signup and view all the answers

<p>Understanding bacterial aggregation is crucial in microbiology as it can be used to identify different bacterial species and differentiate them based on their grouping patterns.</p> Signup and view all the answers

A controlled environment for scientific research and experiments.

Guidelines to ensure safety in the laboratory.

Protective eyewear to shield eyes from hazards.

Identifying where to find fire safety equipment in a lab.

Simple, single-celled organisms without a nucleus.

Complex cells with a defined nucleus and organelles.

Region in prokaryotic cells containing DNA, not membrane-bound.

Keeping the workspace uncluttered and tidy during experiments.

Washing hands after handling chemicals to ensure safety.

Prohibition of food or drink in the laboratory for safety reasons.

Membrane-bound organelle that contains DNA.

Eukaryotic DNA is linear and associated with histones; prokaryotic DNA is circular.

Prokaryotic cells are usually smaller (1-10 µm) than eukaryotic cells (10-100 µm).

Prokaryotic cells divide by binary fission; eukaryotic cells divide by mitosis or meiosis.

Prokaryotic ribosomes are 70S; eukaryotic ribosomes are 80S.

Prokaryotic cells have peptidoglycan; eukaryotic plant cells have cellulose.

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

Bacteria are classified by shape and aggregation types.