Use of a weigh boat in a laboratory.

It is used to contain substances while determining their mass on a balance.

What is the primary purpose of using an inoculating loop in microbiology?

To transfer bacteria from one medium to another without contamination.

Primary use of an electric balance in a laboratory?

To determine the mass of substances precisely.

Why is it important to tare a scale before measuring ingredients?

To subtract the weight of the container from the total measurement.

What is the main function of a magnetic stirrer in a laboratory setting?

Ensure efficient and uniform mixing of solutions.

Why might a scientist use a water bath during an experiment?

To maintain a constant temperature for samples or reactions.

What is the primary function of a spectrophotometer in laboratory experiments?

To measure the concentration of substances by analyzing light absorption

What is the primary function of a vortex mixer in a laboratory?

To mix small amounts of liquid by creating a swirling motion.

What happens when a precipitate forms in a chemical reaction?

A solid appears in the solution.

What is the primary purpose of using an electrophoresis apparatus in a laboratory?

To separate DNA molecules according to their electrical charge and size.

Which laboratory technique commonly uses a thermocycler?

Polymerase Chain Reaction (PCR)

What is the function of thermocycler?

To facilitate the polymerase chain reaction (PCR) for DNA amplification.

Main purpose of PCR in molecular biology?

To make multiple copies of a specific DNA segment.

Why is aseptic technique important in laboratory settings?

It helps to prevent contamination of samples and protects individuals from harmful microorganisms.

What biological entities is Abigail trying to remove by using aseptic techniques before surgery?

Harmful microorganisms (bacteria, viruses, fungi, spores)

Examples of disinfectants that can kill harmful microorganisms on surfaces.

Alcohol (isopropyl alcohol), bleach (sodium hypochlorite), and hydrogen peroxide.

What is the main reason for minimizing aerosol production during clinical procedures?

It prevents the spread of airborne infectious agents.

Methods commonly used to sterilize laboratory glassware?

Autoclaving and chemical disinfectants

Purpose of media used in laboratories?

To provide nutrients and an environment for microorganisms or cells to grow.

Primary use of a Laminar Airflow Hood in laboratories?

To provide a sterile working environment by filtering air and preventing contamination.

Which process is commonly performed using an autoclave in laboratories?

Sterilizing glassware and instruments with pressurized steam.

What are the two types of safety symbols?

Warning symbols and mandatory symbols

What does the symbol mean?

Harmful to environment with long-lasting effects

How are light microscopes different from dissecting microscopes?

Light microscopes are used for higher magnification and detail, while dissecting microscopes are for lower magnification and three-dimensional viewing.

What is a key advantage of using electron microscopes over light microscopes?

They can magnify objects to a much greater extent.

Purpose of using a wet mount in microscopy?

To observe living organisms in their natural state using a liquid medium.

How do you prepare a bacteria slide?

Place a drop of water on a slide, add bacteria, mix, and cover with a coverslip.

A solution is a homogeneous mixture of a solute and a solvent.

What best describes a solute in a solution?

A solute is a substance that is dissolved in a solution.

A substance used to cause a chemical reaction or to test for the presence of another substance.

Function of a buffer in a solution?

It helps maintain a stable pH when acids or bases are added.

What is an acidic solution?

An acidic solution is a solution with a pH less than 7.

Formed when an acid loses a proton.

When using a micropipette, what is the correct technique to draw fluid up?

Push the plunger to the first stop and release slowly to draw fluid up.

Unit 2 Ag biotech Flashcards: 50 Cards (12th Grade)

Student preview

50 questions

Show all answers

1.

FLASHCARD QUESTION

Front

Tool used to determine the amount of liquid in a container accurately.

Back

Graduated cylinder

2.

FLASHCARD QUESTION

Front

What is the meniscus?

Back

The meniscus is the curved surface of a liquid in a container.

3.

FLASHCARD QUESTION

Front

How do you read a meniscus?

Back

Read the measurement at the lowest point of the meniscus.

4.

FLASHCARD QUESTION

Front

What is the function of a beaker?

Back

To hold, mix, and heat liquids in a laboratory.

5.

FLASHCARD QUESTION

Front

What is the volume of the liquid in this graduated cylinder?

Back

7.5 mL

6.

FLASHCARD QUESTION

Front

What is the volume of the water in this graduated cylinder?

Back

11.5 mL

7.

FLASHCARD QUESTION

Front

What is a common use of an Erlenmeyer flask in laboratory experiments?

Back

To safely swirl and mix liquids without spilling.

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