AP Biology Unit 8

An organic compound that is composed of carbon, hydrogen, and oxygen in a 1:2:1 ratio is known as a

• lipid

• carbohydrate

• protein

• nucleic acid

If the pH of a solution is decreased from 7 to 6, it means that the concentration of

• H+ has decreased to 1/10 of what it was at pH 7

• H+ has increased 10 times what it was at pH 7

• OH- has increased 10 times what it was at pH 7

• OH- has increased by 1/7 of what it was

Large bodies of water do not quickly fluctuate in temperature. Why?

• Water is a solvent.

• Water has a high heat capacity.

• Water acts as a buffer.

• Water is non-polar.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

What makes a molecule polar?

• Equal sharing of valence electrons

• Unequal sharing of valence electrons

• Stealing of electrons

• Temporary charges that come and go

Tags

NGSS.HS-PS1-1

Water has a much higher specific heat than most other covalent compounds. What do you predict might happen if water had a low specific heat instead?

• Flooding would occur and animals would be forced to migrate

•  Harmful organisms living in water would reproduce at a rapid rate

• Organisms that are sensitive to changes in temperature would die

• Plants would not have enough water to effectively carry out photosynthesis

Tags

NGSS.HS-LS1-3

Describe COHESION.

• Water molecules attracted to other substances.

• Water molecules climbing upwards against the force of gravity.

• Water molecules dissolving many substances because of its polarity.

• Water molecules attracted to other water molecules.

Which list of compounds characterizes RNA?

• a phosphate group, deoxyribose, and uracil

• a phosphate group, ribose, and uracil

• a phosphate group, ribose, and thymine

• an amino group, deoxyribose, and uracil

Hydrolysis is involved in which of the following?

• formation of starch, a polysaccharide, from monomers of glucose

• hydrogen bond formation between nitrogen bases of nucleic acids

• peptide bond formation between amino acids to form proteins

• the digestion of sucrose, a disaccharide to its monomers of glucose and fructose

Polymers of carbohydrates and proteins are all synthesized from monomers by which of the following processes?

• the joining of monosaccharides

• hydrolysis

• dehydration synthesis

• signal transduction

Peptide bonds happen in

• carbohydrates

• lipids

• proteins

• nucleic acids

Tags

NGSS.HS-LS1-6