BIOLOGY FIRST SEMESTER FINAL EXAM REVIEW

Carbon is unique due to the carbon atom's 

• bonding properties
• six outer unpaired electrons
• ionic compounds
• hydrogen bonding strength

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

• unsaturated fatty acids
• phospholipids
• proteins
• carbohydrates

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NGSS.HS-LS1-6

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

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NGSS.HS-LS1-1

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

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NGSS.HS-PS1-5

NGSS.HS-PS1-7

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

• chemical energy
• activation energy
• bond energy
• reaction energy

Which phrase best describes an exothermic chemical 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

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NGSS.HS-PS1-4

Which phrase best describes the effect of a catalyst on a chemical reaction?

• increases the temperature
• increases the volume of reactants
• decreases the reaction rate
• decreases the activation energy

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NGSS.HS-PS1-5

Enzymes affect chemical reactions in living organisms by

• changing the direction of a reaction
• breaking down molecules into starch
• increasing the temperature range
• weakening bonds in reactants

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NGSS.HS-PS1-2

NGSS.HS-PS1-5