Energy and enzymes

Energy and enzymes

Chapter 6

Multiple Choice

Which best describes the first law of thermodynamics?

• Energy can be created from matter or used to produce matter.

• Energy is not created nor destroyed, but it can change from one energy form to another.

• Energy is changed from one form to another with a loss of usable energy.

• Energy transfers are always 100% efficient in changing energy from one useful form to another.

Multiple Choice

Which form of energy is NOT correctly associated with the related example?

• kinetic energy: fat molecules

• potential energy: ATP

• chemical energy: glucose

• potential energy: water held behind a dam

Multiple Choice

The synthesis of sugar molecules through the process of photosynthesis requires energy absorbed from sunlight. Bearing this in mind, what kind of reaction is photosynthesis?

• exergonic

• endergonic

• catabolic

• feedback

Multiple Choice

What is the activation energy?

• The energy of the products

• The energy of the reactants

• The minimum energy needed by the reactants to form the products

• The energy lost in the reaction

Multiple Choice

What is the potential energy of the reactants?

• 10 kJ

• 45 kJ

• 103 kJ

• 58 kJ

Multiple Choice

What is the potential energy of the products?

• 10kj

• 103kj

• 45kj

• 58kj

Multiple Choice

What is the ΔG of the reaction?

• 35 kJ

• -35 kJ

• 58 kJ

• -58 kJ

Multiple Choice

What kind of reaction is this?

• Endothermic

• Exothermic

• Cannot be determined