exam 3 practice

Energy is stored long-term in the bonds of _____ and used short-term to perform work from a(n) _____ molecule.

• 1. ATP : glucose

• 1. an anabolic molecule : catabolic molecule

• 1. glucose : ATP

• 1. a catabolic molecule : anabolic molecule

Which of the following is not an example of an energy transformation?

• 1. turning on a light switch

• 1. solar panels at work

• 1. formation of static electricity

• 1. none of the above

The energy released by the hydrolysis of ATP is____

• 1. primarily stored between the alpha and beta phosphates

• 1. equal to −57 kcal/mol

• 1. harnessed as heat energy by the cell to perform work

• 1. providing energy to coupled reactions

Which of the following molecules is likely to have the most potential energy?

• 1. sucrose

• 1. ATP

• 1. glucose

• 1. ADP

An allosteric inhibitor does which of the following?

• 1. Binds to an enzyme away from the active site and changes the conformation of the active site, increasing its affinity for substrate binding.

• 1. Binds to the active site and blocks it from binding substrate.

• 1. Binds to an enzyme away from the active site and changes the conformation of the active site, decreasing its affinity for the substrate.

• 1. Binds directly to the active site and mimics the substrate.

Which of the following analogies best describes the induced-fit model of enzyme-substrate binding?

• 1. a hug between two people

• 1. a key fitting into a lock

• 1. a square peg fitting through the square hole and a round peg fitting through the round hole of a children’s toy

• 1. the fitting together of two jigsaw puzzle pieces

The energy currency used by cells is ________.

• 1. ATP

• 1. ADP

• 1. AMP

• 1. adenosine

A reducing chemical reaction ________.

• 1. reduces the compound to a simpler form

• 1. adds an electron to the substrate

• 1. removes a hydrogen atom from the substrate

• 1. is a catabolic reaction

During the second half of glycolysis, what occurs?

• 1. ATP is used up.

• 1. Fructose is split in two.

• 1. ATP is made.

• 1. Glucose becomes fructose.

What is removed from pyruvate during its conversion into an acetyl group?

• 1. oxygen

• 1. ATP

• 1. B vitamin

• 1. carbon dioxide