AP Biology Unit

The parts of a gene that do NOT code for amino acids in a protein are called

• introns

• exons

• codons

• anticodons

Smaller segments of RNA nucleotides that transport amino acids to the ribosomes.

• mRNA

• tRNA

• rRNA

• DNA

The anticodon is located on 

• DNA

• mRNA

• tRNA

• rRNA

Choose the term that correctly describes the relationship between these two sugar molecules:

• cis-trans isomers

• enantiomers

• structural isomers

• isotopes

Which functional group is not present in this molecule?

• amino

• carboxyl

• hydroxyl

• sulfhydryl

Tags

NGSS.HS-LS1-6

Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?

• The two strands of the double helix would separate.

• The pyrimidines would be separated from the deoxyribose sugars.

• All bases would be separated from the deoxyribose sugars.

• The phosphodiester linkages of the polynucleotide backbone would be broken.

Which of the following best describes the relationship between the atoms described in Figure 2.1?

• They are isotopes.

• They each contain 1 neutron.

• They are compounds.

• They are polymers.

• They contain 1 and 3 protons, respectively.

Tags

NGSS.MS-PS1-1

The reactivity of an atom arises from

• the sum of the potential energies of all the electron shells.

• the potential energy of the valence shell.

• the average distance of the outermost electron shell from the nucleus.

• the existence of unpaired electrons in the valence shell.

Tags

NGSS.HS-PS1-2

Which of the following statements correctly describes any chemical reaction that has reached equilibrium?

• The reaction is now irreversible.

• The rates of the forward and reverse reactions are equal.

• Both forward and reverse reactions have halted.

• The concentrations of products and reactants are equal.

Tags

NGSS.HS-PS1-6

Many mammals control their body temperature by sweating. Which property of water is most directly responsible for the ability of sweat to lower body temperature?

• water's change in density when it condenses

• the absorption of heat by the breaking of hydrogen bonds

• the release of heat by the formation of hydrogen bonds

• water's ability to dissolve molecules in the air

Tags

NGSS.MS-PS3-4