Concept 2

Which macromolecule found in the food you eat will your cells break down first to get ATP?

• carbohydrates

• lipids

• proteins

• nucleic acids

Which phrase best describes the function of the ATP molecule?

• absorbs energy

• increases energy

• stores energy

• creates energy

Energy is released from an ATP molecule for cellular processes when it

• converts a phosphate group to ADP

• attaches an extra phosphate group

• produces a sugar molecule

• loses a phosphate group

Which of the following reactions directly provides chemical energy for most cell functions?

• ADP -> ATP + P

• ADP + P -> ATP

• ATP + P -> ADP

• ATP -> ADP + P

Where does your body get the energy for reattaching a third phosphate to ADP, creating ATP?

• from nucleic acids

• usually from carbs

• from breaking ATP

• from the sun

What is the main currency for the cell?

• ATP

• ADP

• endothermic

• exothermic

How many phosphate groups does ATP have?

• 1

• 2

• 3

• 4

How is energy released in the ATP-ADP cycle?

• when cells join together

• when a phosphate group is removed

• when a phosphate group is added

• when ADP is recycled

Which reactions allows energy to be taken in?

• endothermic

• exothermic

Which is least likely to be broken down for energy?

• carbs

• lipids

• proteins

• ribose