Laboratory Equipment Quiz

A measure of a solute's relative nonpolarity, indicating faster lysis time with higher values.

The variable manipulated by the researcher in an experiment.

The variable measured to see how it changes in response to the independent variable.

Asks how two or more factors relate, without a prediction.

Hypothesis includes a prediction & rationale while a research question focuses on understanding relationships between factors.

A graduated glass tube used for precise dispensing of large volumes of liquids, typically ranging from 1 mL to 50 mL.

A disposable glass tube used for transferring small volumes of liquids, usually without precise measurement.

A precision instrument used to dispense very small volumes of liquids, typically in microliters (µL).

A type of microscope that uses multiple lenses to magnify an object, providing a 3D image with high resolution.

The overall magnification power of a compound microscope, calculated by multiplying the magnification of the objective lens by the magnification of the eyepiece lens.

A simple chemical test used to detect the presence of starch in a sample.

A sample that should not contain the substance being tested for, used to ensure that the test is working correctly.

Iodine solution interacts with starch molecules, causing a blue-black color change. The reaction occurs due to the formation of a complex between iodine and the amylose component of starch.

A type of micropipette capable of dispensing volumes between 20 and 200 μL. It has a three-digit display, where the first digit indicates the hundreds place and the second digit indicates the tens place.

A type of micropipette capable of dispensing volumes between 100 and 1000 μL. It has a four-digit display, where the first digit indicates the hundreds place, the second digit indicates the tens place, and the third digit indicates the ones place.

To set a micropipette for a specific volume, rotate the volume adjustment knob to the desired value. For P200, set the volume to 150μL using the three-digit display (150). For P1000, set the volume to 150μL using the four-digit display (0150).

One milliliter (mL) is equal to 1000 microliters (μL). To convert μL to mL, divide the volume in μL by 1000.

A variable that is kept constant throughout an experiment to ensure consistent conditions across different groups or treatments.

A variable that unexpectedly influences the results of an experiment, making it difficult to determine the true effect of the independent variable.

The numerical volume displayed on the micropipette, indicating the amount of liquid to be dispensed.

A testable prediction that suggests a specific relationship between variables, often based on existing knowledge or observations.

A structured plan outlining the steps involved in conducting an experiment, including the independent and dependent variables, control groups, and the methods for data collection.

The bursting of a cell, often due to an influx of water caused by osmotic pressure differences.

The movement of water across a semi-permeable membrane from an area of high water concentration to an area of low water concentration.

A solution with the same solute concentration as the inside of a cell, resulting in no net movement of water across the cell membrane.

A solution with a lower solute concentration than the inside of a cell, causing water to move into the cell and potentially causing it to swell or lyse.