Unit 2 - Chemistry of Life Review

Carbon is unique due to the carbon atom's

• bonding properties

• six outer unpaired electrons

• ionic compounds

• hydrogen bonding strength

Tags

NGSS.HS-PS1-1

Which category of carbon-based molecules includes sugars and starches?

• unsaturated fatty acids

• proteins

• nucleic acids

• carbohydrates

Fats, oils, and cholesterol are all types of:

• cell membranes

• hormones

• lipids

• fatty acids

Proteins are composed of which molecules?

• amino acids

• fatty acids

• monosaccharides

• nucleic acids

Tags

NGSS.HS-LS1-6

DNA and RNA are two types of:

• proteins

• nucleic acids

• lipids

• carbohydrates

Chemical reactions change substances into different substances by:

• conserving matter between the substances

• breaking and forming chemical bonds

• strengthening electrical charges of substances

• changing a solvent into a solute

Tags

NGSS.HS-PS1-7

Identify the reactants in the following chemical equation: 6 H₂O + 6 CO₂ → C₆H₁₂O₆ + 6 O₂

• 6 H₂O and 6 CO₂

• 6 CO₂ and C₆H₁₂O₆

• 6 H₂O, C₆H₁₂O₆, and 6 O₂

• C₆H₁₂O₆ and 6 O₂

Tags

NGSS.HS-LS2-5

NGSS.HS-PS1-2

The double arrows tell you that the reaction CO₂ + H₂O ↔ H₂CO₃

• takes place very rapidly

• is very unstable

• occurs in both directions

• has high bond energies

What is the term for the amount of energy that needs to be added for a chemical reaction to start?

• chemical energy

• activation energy

• reactant energy

• bond energy

Tags

NGSS.HS-PS1-4

Which phrase best describes an exothermic reaction?

• does not absorb any energy

• forms products with higher bond energy than reactants

• is in a state of equilibrium

• releases more energy than it absorbs

Tags

NGSS.HS-PS1-4