BIO 311C Unit 3 Study Quiz

Which experiment showed that organic molecules could arise on Earth before life evolved?

• Miller-Urey experiment

• Bohr's experiment

• Einstein's experiment

• Newton's experiment

What is the significance of the presence of oxygen in the Miller-Urey experiment?

• It would have no effect

• It would cause molecules to break down

• It would prevent the synthesis of organic molecules

• It would cause molecules to ignite

Which domain of life contains prokaryotic cells?

• Archaea

• Animals

• Eukarya

• Plants

What is the function of aquaporins in cells?

• Facilitate the diffusion of water

• Facilitate the diffusion of ions

• Facilitate the diffusion of large molecules

• Facilitate the diffusion of gases

Which type of hormone requires a cell surface receptor for signaling?

• Peptide hormone

• Steroid hormone

• Amino acid derivative hormone

• Thyroid hormone

What is the main function of G-protein coupled receptors (GPCRs)?

• Catalyze the transfer of phosphate groups

• Facilitate the diffusion of water

• Activate other proteins when bound to by ligand

• Initiate protein synthesis

What type of ion channels open in response to a physical stimulus?

• Ligand-gated ion channels

• Light-gated ion channels

• Voltage-gated ion channels

• Mechanically gated ion channels

What is the main function of kinases in regulating protein activity?

• Initiate protein synthesis

• Catalyze the transfer of phosphate groups

• Remove phosphate groups from molecules

• Attach phosphate groups to molecules

Which amino acid has a hydroxyl group attached to a carbon ring in the side chain?

• Tyrosine

• Tryptophan

• Phenylalanine

• Cysteine

Why is the process of kinase action and p-group transfers called a phosphorylation cascade?

• It involves the removal of phosphate groups from molecules

• It involves the attachment of phosphate groups to molecules

• It involves a single chemical reaction of kinases

• It involves a series of linked chemical reactions of kinases