9.1 LESSON Energy of Life

Energy and Life

Learning Objectives

▪ Describe why ATP is useful to cells.
▪ Describe what happens during the process of

photosynthesis.

Adenosine Triphosphate (ATP)

Adenosine triphosphate (ATP) is one of the most important
compounds that cells use to store and release energy.

3 phosphate groups

ribose

adenine

Labelling

Label the three parts of ATP

Drag labels to their correct position on the image

Triple P complex

adenine

phosphates

ribose

Adenosine Diphosphate (ADP)

Adenosine diphosphate (ADP) has two phosphate groups
instead of three.

adenine

ribose

2 phosphate groups

Fill in the Blank

ATP has 3 phosphates.

How many phosphates does ADP have?

Storing Energy

When a cell has energy available, it can store small
amounts of it by adding phosphate groups to ADP
molecules, producing ATP.

Multiple Choice

Which of these is a way that cells can STORE energy?

(Read carefully!)

• Making ATP

  by adding a phosphate to ADP

• Making ADP

  by removing a phosphate from ATP

• Making ADP

  by adding a phosphate to ATP

• Making ATP

  by removing a phosphate from ADP

Releasing Energy

When a cell needs energy, it can release it by breaking
the bond between the second and third phosphate
groups in ATP.

Multiple Choice

Which of these is a way that cells can RELEASE energy?

(Read carefully!)

• Making ATP

  by adding a phosphate to ADP

• Making ADP

  by removing a phosphate from ATP

• Making ADP

  by adding a phosphate to ATP

• Making ATP

  by removing a phosphate from ADP

ATP and Batteries

Labelling

Label the diagram with the correct compounds to complete the cycle.

Drag labels to their correct position on the image

ADT

ATD

ATP

ADP

ATP Production

Cells must produce ATP. In photosynthesis, plants convert
the energy of sunlight into chemical energy stored in the
bonds of sugar. Sugar is a better way to store larger amounts of energy in a cell for a longer amount of time. The energy from sugar is used to add phosphates to ADP to "recharge the battery".

Multiple Choice

What is produced using the process of photosynthesis?

• ATP

• ADP

• sugar

• water

Multiple Choice

How is the energy from sugar used in cells?

• to make ATP

• to make ADP

• to transport ions through the cell membrane

• to move around

Heterotrophs and Autotrophs

Organisms that make their own food are autotrophs.
Plants and phytoplankton are autotrophs.
Organisms that obtain food by consuming other living things
are heterotrophs.
Animals, Fungi and zooplankton are heterotrophs.

Categorize

Options (7)

plants

phytoplankton

make their own food

animals

fungi

zooplankton

consume other organisms

Organize these options into the right categories

Autotrophs

Heterotrophs