Week 3b: Energy Flow

Question 1

Chemical energy is a form of _______ energy?

Answer 1

Potential energy

Question 2

Where is energy stored?

Answer 2

In the bonds between atoms.

Question 3

Bigger molecules have more atoms, therefore:

Answer 3

They store more energy in their chemical bonds.

Question 4

Chemical energy is released when -

Answer 4

Complex molecules break down to smaller molecules

Question 5

How much energy from the glucose transferred to ATP?

Answer 5

40%

Question 6

How much energy in glucose molecules is lost as free energy/heat?

Answer 6

60%

Question 7

When big ‘energy rich’ molecules are changed into smaller ‘energy poor’ molecules, what happens to the energy?

Answer 7

Some is stored in other molecules, and the rest is released as heat.

Question 8

What is ATP made up of? (3)

Answer 8

• An adenine base
• 5 carbon sugars (ribose)
• 3 phosphate groups linked together

Question 9

ATP can be broken down to form:

Answer 9

Adenosine DI-phosphate (ADP), and an inorganic phosphate - the bond between the second and third molecules is very weak.

Question 10

Characteristics of ATP

Answer 10

• a renewable resource that can be recharged over and over
• contains small amounts of usable energy
• soluble ; can be transferred easily

Question 11

ATP is mainly manufactured from:

Answer 11

The free energy created via cellular respiration