Unit 1 AP Biology Chemistry of Life

Cohesive forces between water molecules and adhesive forces between water molecules enable ______ to occur

• surface tension

• capillary action

• photosynthesis

• ice floating on water

Tags

NGSS.HS-ESS2-5

Describe the bonds in water

• covalent bonds connect H and O of one water molecule; hydrogen bonds connect different water molecules

• ionic bonds connect H and O of one water molecule; covalent bonds different water molcules

• hydrogen bonds connect H and O of one water molecule; hydrogen bonds connect different water molcules

• hydrogen bonds connect H and O of one water molecule; covalent bonds connect different water molcules

Tags

NGSS.MS-PS1-1

Large bodies of water help to keep nearby climates from being too hot or too cold because they

• absorb heat in the fall and slowly release heat in the spring

• absorb heat in the spring and slowly release that heat in the fall

• absorb heat in the summer and slowly release that heat in the winter

• absorb heat in the winter and slowly release that heat in the summer

Tags

NGSS.HS-ESS2-4

The fact that ice floats on water is due to the fact that water's solid form ____ than its liquid form

• is more dense

• is less dense

• is more polar

• has less surface tension

Which statement correctly describes hydrolysis reactions?

• Hydrolysis adds water to build a larger molecule

• Hydrolysis removes water to build a larger molecule

• Hydrolysis adds water to split a molecule

• hydrolysis removes water to split a molecule

Which of the following are the strongest interactions?

• Covalent bonds

• ionic bonds

• hydrogen bonds

• Van der Waals forces

Mammals sweat to regulate body temperature (evaporative cooling). What property of water is responsible?

• water's change in density when it condenses

• water's ability to dissolve molecules in air

• the release of heat by the formation of hydrogen bonds

• the absorption of heat by during a phase change

Tags

NGSS.HS-PS3-4

Which describes the bonds in a DNA molecule?

• covalent bonds in the backbone and hydrogen bonds holding the bases together

• covalent bonds in the backbone and ionic bonds holding the bases together

• hydrogen bonds in the backbone and ionic bonds holding the bases together

• hydrogen bonds in the backbone and ionic bonds holding the bases together

A protein made of only one polypeptide is heated to a high temperature, breaking Hydrogen bonds. What level(s) of protein structure would be affected?

• all - primary, secondary, tertiary, quaternary

• primary, secondary, tertiary

• secondary and tertiary

• secondary, tertiary, and quaternary

In what ways do DNA and RNA differ?

• DNA is double stranded and RNA contains deoxyribose

• DNA contains thymine and RNA contains ribose

• DNA contains ribose and RNA is single-stranded

• DNA contains uracil and RNA contains ribose