Thermodynamics and Energy Concepts

The second law of thermodynamics essentially says

• heat is energy

• motion energy converts to heat energy
  

• entropy increases

• at the atomic level, motion is continuous

Tags

NGSS.HS-PS3-4

The energy required to destabilize existing chemical bonds is called ____ energy.

• activation

• kinetic

• destabilization

• free

Tags

NGSS.HS-PS1-4

Which of the following is uncharacteristic of ATP?

• It is formed by attaching a phosphate group to ADP with a high-energy bond.
  

• In most reactions involving ATP, only the outer, high-energy bond is hydrolyzed.
  

• It is a good long-term energy storage molecule.

• When dephosphorylated, ATP becomes ADP.

The First Law of Thermodynamics states that energy can be

• destroyed

• kinetic

• created

• converted

Tags

NGSS.HS-PS3-2

The universal energy currency for all cells is

• starch

• O2

• glucose

• ATP

Tags

NGSS.HS-LS1-7

Enzymes...

• all of the above

• lower the activation energy of a reaction

• make endergonic reactions proceed spontaneously
  

• are not specific in their choice of substrates

• are needed in large quantities because they are used up during catalysis

The energy available to do work in a system is called

• activation energy

• heat

• free energy

• thermodynamics

• entropy

Which of the following statements about enzymes is true?

• all of the above

• all enzymes have the same pH optimum

• the active sites of all enzymes have the same three-dimensional shape

• Substrate binding can make enzymes change shape slightly

Why do drastic changes in the temperature or pH of a system alter enzyme activity?

• they change the three-dimensional shape of the enzyme

• they disrupt hydrogen and ionic bonds in the enzyme

• they disrupt bonding interactions in the enzyme

• all of the above

In the chemical equation G = H - TS, the term G stands for

• the reactants

• free energy

• enthalpy

• the products
  

• entropy