Lab: Identifying Nutrients

Question 1

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

Revolt · Accepted Answer

A

Question 2

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

Revolt · Accepted Answer

gelatin

Question 3

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

Revolt · Accepted Answer

water

Question 4

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

Revolt · Accepted Answer

gelatin

Question 5

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

Revolt · Accepted Answer

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 use

Question 6

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

Revolt · Accepted Answer

Tell your teacher right away.

Question 7

Did you read the Student Guide carefully?

Revolt · Accepted Answer

yes

Question 8

Which reagent is used to test for protein?

Revolt · Accepted Answer

Biuret reagent

Question 9

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

Revolt · Accepted Answer

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

Lab: Identifying Nutrients Answers

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