Unit 8- Lesson 2 (ATP)

Unit 8: Energy Transfer

Lesson 2- ATP

Multiple Choice

What is the P in ATP?

• Perennial

• Phosphate

• Polypeptide

• Phenotype

Energy and ATP

• Energy comes in many forms:

– light
– thermal (heat)
– electrical
– mechanical
– nuclear
– chemical

Multiple Choice

Which type of energy is required for producers to go through photosynthesis?

• Light

• Mechanical

• Nuclear

• Electrical

Energy and ATP

• Energy can be stored in the chemical bonds of

molecules and compounds

• In living things, chemical energy is stored in the

chemical bonds of
– Carbohydrates
– Proteins
– Lipids (Fats)

Multiple Choice

Carbohydrates and Lipids are made of these elements:

• C-H-O

• C-H-O-N

• C-H-O-N-P

• C-H-O-N-P-Y

Multiple Choice

What percentage of energy is lost going from Trophic Level #1 to Trophic Level #2?

• 90%

• 10%

• 50%

• .1%

Cells need energy

• Energy in cells is carried

in the form of ATP

• ATP = adenosine

triphosphate

ATP consists of:

– adenine (nitrogen base)

– ribose (a 5-carbon sugar)

– 3 phosphate groups

ATP is a type of nucleotide

Adenine

Ribose

3 Phosphate

groups

Multiple Choice

What else is a type of Nucleotide?

• DNA

• Protein

• Ribosomes

• Cell Membrane

Where does ATP come from?

• Fooddoes not contain ATP

• Digestion breaks down food into smaller

molecules that can be used to make ATP (by the
mitochondria)

• How much ATP is made is related to the number

of Calories in the food

• # of ATP produced also depends on the type of

molecule broken down- carbohydrate, lipid or protein

Multiple Choice

Where is ATP made?

• Ribosomes

• Nucleus

• Endoplasmic Reticulum

• Mitochondria

ATP/ADP Cycle

Releasing Energy

●To release the energy stored in ATP molecules,
bonds between their phosphate groups are broken
through hydrolysis.
●Hydrolysis is a chemical reaction in which a water
molecule splits another molecule.
● As a result of hydrolysis, energy is released and
ATP loses a phosphate to become ADP (Adenosine
diphosphate).

Multiple Choice

What does Lysis mean in Greek? (Hint: Hydrolysis is splitting of molecules with a water molecule)

• Releasing

• Strengthen

• Lengthen

• Boring

ATP/ADP Cycle

Storing Energy

● Small amounts of energy can be stored in a
cell by adding phosphate groups to ADP
molecules (called phosphorylation), producing
ATP.
● ADP is constantly recombined with phosphate
groups to form new molecules of ATP to support
the work of the cell.

Multiple Choice

Adenosine TRIphosphate and Adenosine DIphosphate are different because...

• ATP has fewer phosphates

• ADP has more phosphates

• ATP has more phosphates

• ADP has different color phosphates