Please match the steps of the PCR technique with the statements that most accurately describe them.

A(n) _______ solution has a higher concentration of water and lower concentration of solute than the cell placed in the solution.

In the yeast fermentation experiment, what is being produced to cause the air bubble at the top of the tube to increase over time?

If a sperm cell contains 8 chromosomes, it comes from an animal that has ______

A student measured the weight of 10 male rats fed junk food compared to 10 male rats fed a healthy diet. The average weight of each group can be seen in the table below. What important variable did the student hold constant when she designed this experiment?   Weight in ounces Weight in kilograms Rats fed junk food 21.1 ? Rats fed healthy food 16 ?

Why do you think it is a good idea to soak wilted lettuce in cool water before serving it?

A(n) _______ solution has a lower concentration of water than the cell placed in the solution.

Imagine that you wish to compare two different diets that will be fed to tadpoles raised in a lab. One diet is a meat-based fish food, and the other is the traditional diet of boiled lettuce. You want to see if the meat-based diet will be associated with an increase in the average weight of the tadpoles. In your experiment you keep all other factors, such as tadpole density per pan, temperature, pH, and the amount of food the same. The only difference between your control and experimental groups is the type of food the tadpoles receive. Which is a good hypothesis for this tadpole experiment?

When biuret reagent is added to a solution containing protein, the solution turns pink or purple. In the absence of protein, the solution is blue. Biuret reagent was added to solutions that may or may not contain protein. The data can be seen in the table below. What conclusion can be drawn from this data?   Tube Result A Blue B Blue C Blue D Purple

How can you determine the optimum pH of an enzyme?