Bio - Enzymes and Macromolecules Review

What is a substance called if it speeds up a chemical reaction?

• reusable
• catalyst
• specific
• fragile

Tags

NGSS.HS-PS1-5

Letter B...

• active site
• enzyme
• substrate
• products

Tags

NGSS.MS-LS1-7

NGSS.MS-PS1-2

Letter E...

• active site
• enzyme
• substrate
• products

Tags

NGSS.MS-LS1-7

An enzyme speeds up a reaction by

• lowering the activation energy.
• raising the activation energy.
• releasing energy.
• absorbing energy.

Tags

NGSS.HS-PS1-4

What factors affect an enzyme's reaction rate?

• temperature 
• pH
• substrate concentration
• all of these

All enzymes are examples of organic molecules known as

• proteins

• carbohydrates

• lipids

• nucleic acids

Tags

NGSS.HS-LS1-1

What type of molecules is used for the synthesis of an enzyme?

• amino acids

• fatty acids

• monosaccharide

• glycerol

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

Which is characteristic of an enzyme?

• it is not organic

• it is destroyed after each chemical reaction

• it provides energy by losing a phosphate

• it increases the reaction rate of a chemical reaction

Which statement about enzymes is NOT correct

• enzymes are composed of polypeptide chains

• enzymes bond temporarily with substrates

• enzymes are destroyed when they are used and must be synthesized for each reaction

• enzymes are specific because of their shape and catalyze only certain reactions

A student placed a test tube containing a mixture of compounds into a beaker of water maintained at 30 ℃. A chemical reaction took place and was completed in 30 minutes. A second test tube containing the same mixture plus a new substance “Y” was placed into the same beaker. The chemical reaction in that second tube was completed much faster, in less than 1 minute. Substance Y is probably

• A phospholipid

• An enzyme

• A sugar

• A nucleotide

Tags

NGSS.HS-PS1-5