OFFICIAL AP Bio Unit 1 Test

A scientist is studying the ability of pollutants to cause cancer when added to cultures of different cell types. Which of the following is most likely a dependent variable in the scientist's investigation?

The percentage of cells that undergo cell division

Which part of the diagram below is showing a monomer and how can you tell?

Because the molecule include only one subunit

You are given a protein with the following amino acid sequence:

Methionine (nonpolar) — glycine (nonpolar) — serine (polar) — alanine (nonpolar) — lysine (polar)

Lysine is replaced by tryptophan (nonpolar)

The structure of cysteine, an amino acid, can be seen below. Cysteine is one of only a fee amino acids that contains sulfur. In which structural level of a protein would cysteine play the most significant role?

Tertiary Structure