A mystery solution was tested using iodine. The mystery solution turned black while the control remained iodine-colored. What is this solution?

If you really want to know if this Sudan III test of this mystery solution is postive, what should you do?

A biochemist is performing a Biuret test on a mystery solution. Which test tube would be the experimental control? Why is this needed.

When Biuret solution is added to a mystery solution the chemical reaction produced a dark purple color. What does this tell you?

In an iodine test, what is the experiemental control?

In the experiment in this picture, which controlled variable was not controlled very well?

A biochemist wants to test five different mystery solutions for nutrients. In her experiment, what would be the controlled variables?

Scientists can collect qualitative data or quantitative data. Which type of data are you collecting when you do Biuret Tests, Bennedict's Tests, Iodine Tests, and Sudan III Tests?

Iodine was added to bread. What does the result of the chemical reaction tell you?

Which test tube has the positive Biuret test?

A biochemist is testing five different mystery solutions for protein. He designates one test tube for a control. What is his dependent varaible?

What does a positive Bennedict's test tell you about the mystery solution you are testing?

Which Bennedict's test is positive?