Lab: Identifying Nutrients

What is the name of the glass container above that you used to heat water?

a beaker

If Zack is guilty, and the mystery food sample contains protein, which test tube will the mystery food sample resemble?

gelatin

While using Biuret reagent, you test not only the mystery food sample, but also gelatin and water. Which solution acts as a positive control?

gelatin

Sweetened foods often contain simple___1__ and are known as__2__.

1 sugar 2 monosaccharides

1____are constructed from amino acids, and some of these are only available to our bodies if they are ingested as__2.

1 proteins 2 food

Which pipette above shows that 4 mL of liquid has been dispensed?

A

Which reagent is used to test for protein?

Biuret reagent

A test tube fell on the floor and broke! What would you do? Check all that apply.

Tell your teacher right away.

Why was a beaker used for heating the solution?

The beaker's wide mouth makes it easier to add and remove test tubes without spilling

The test above shows test for the mystery food sample.

negative

In each trial, you will add an indicator to the mystery food sample. But you will also add the indicator to a known substance and water. Why is that important? Check all reasons.

to match the mystery food sample to a definite positive result (gelatin, oil, etc.) to match the mystery food sample to a definite negative result (water)

Check all the ways listed below that ensure accurate reading of volume from a graduated pipette.

using subtraction to determine the volume dispensed. making sure that you read the volume with the liquid inside the pipette at eye level. ensuring that air bubbles are not in the column of liquid inside the pipette.

Select all steps below that ensure laboratory safety during the experiment you carried out.

using test tube tongs to handle the hot test tubes checking the beaker for chips prior to heating on the hot plate turning off the hot plate after us

Which test tube(s) acts as a negative control?

water