AP Biology Enzymes and Energy

Which of the following correctly describes how enzymes work?  

• they lower the energy of the reactants to increase the rxn rate
• they supply energy to the reaction to increase the rxn rate
• they lower the energy of the products to increase the rxn rate
• they lower the activation energy of the reaction to increase the rxn rate

Tags

NGSS.HS-PS1-5

What type of macromolecule are enzymes?

• Protein
• Carbohydrate
• Lipid
• Nucleic Acid

Tags

NGSS.MS-LS1-7

Enzymes are made up of these repeating monomers.

• monosaccharides
• amino acids
• nucleotides
• phospholipids

Tags

NGSS.HS-LS1-6

The part of the enzyme that the substrate bonds to is called the _____.

• active site
• activation energy
• bond site
• peptide bond

The energy needed to start a reaction

• activation energy
• adhesion energy
• chemical energy
• cohesion energy

Tags

NGSS.HS-PS1-4

Which of these is NOT true?

• Enzymes can denature (change shape) when the temperature gets too high.
• Enzymes can only be used once in a chemical reaction. 
• Extreme pH can denature enzymes.
• Enzymes speed up chemical reactions. 

Tags

NGSS.HS-PS1-5

Which of the following is directly responsible for the shape of an enzyme/protein?

• The amino acid sequence of the protein and the properties of the amino acids that make up the protein.

• The temperature of the surrounding environment.

• The pH of the surrounding environment.

• The amount of substrate present.

Energy is released from ATP when

• a phosphate group is added
• adenine bonds to ribose
• ATP is exposed to sunlight
• a phosphate group is removed

Tags

NGSS.MS-LS1-7

Cyanide is a toxin that stops the mitochondria from producing ATP. If cyanide were introduced into your cells, it is probably acting as a(n)

• activator

• coenzyme

• inhibitor

• substrate

Tags

NGSS.HS-LS1-7

Whenever energy is transformed, there is always an increase in the ______________

• free energy and enthalpy of the universe
• free energy of the universe
• entropy of the universe
• enthalpy of the univers

Tags

NGSS.HS-PS3-4