Transcript 5.5 Explaining How Plants Grow: Biosynthesis PPT

Carbon: Transformations in Matter and Energy
Environmental Literacy Project
Michigan State University
Plants Unit
Activity 5.4: Explaining How
Plants Grow: Biosynthesis
1
Unit Map
You
are
here
2
Revisit your arguments
Think about what
you know now that
you didn’t know
before. What have
you learned?
3
How do plants use food and minerals
as materials for growth?
4
Biosynthesis
Materials
for growth:
Biosynthesis
Food
To Cells
Energy:
Cellular
respiration
5
Constructing Explanations
Consider the
following as you
construct your
explanation:
• Evidence from
the investigation
• What you
learned from the
molecular
modeling or
tracing activity
• Three Questions
Handout
6
Comparing Ideas with a Partner
• Compare your explanations for each of the
Three Questions.
– How are they alike?
– How are they different?
• Check your explanation with the middle- and
right-hand columns of the Three Questions
handout.
• Consider making revisions to your explanation
based on your conversation with your partner.
7
The Matter Movement Question
water
minerals
Glucose
Which atoms and molecules move so
that plants can grow through
biosynthesis?
The Matter Movement Question
water
minerals
glucose
How do glucose water, and minerals move
for a plant stem cell to grow?
Matter Movement
Small Organic
Molecules or
Monomers
Do you have:
• an arrow
showing small
organic
molecules or
monomers
(amino acids,
sugars, and fatty
acids) going into
the potato cell?
10
Matter Movement
Soil Minerals
Small Organic
Molecules or
Monomers
Do you have:
• an arrow
showing soil
minerals going
into the
potato cell?
11
Matter Movement
Soil Minerals
Small Organic
Molecules or
Monomers
Do you have:
• large organic
molecules (or
polymers)
staying in the
potato cell?
Large organic
molecules or
polymers
12
The Matter Change Question
What happens to small organic molecules during
biosynthesis?
Chemical
change
Small organic molecules (monomers)
go into cells, but don’t come out. What
happens inside the cells?
Matter Change
Name the chemical change that potato cells use
to build large organic molecules:
Biosynthesis
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Matter Change
What molecules are carbon
atoms in before the
chemical change?
Small organic molecules (or
monomers such as amino
acids, sugars, and fatty
acids)
Chemical
What molecules are carbon
atoms in after the chemical
change?
Large organic molecules (or
carbohydrates, Fats/Lipids,
and Proteins)
Change
What other molecules
are needed?
None
What other molecules are
produced?
Water
15
Energy Change
What forms of energy go
What forms of energy
into this chemical change? come out of this chemical
change?
Chemical Energy
Chemical Energy
16
Telling the Whole Story
Question: How does a cell in the root of a potato
use food to grow and divide?
• Does your story include these parts?
Matter movement: Small organic molecules (monomers, such as amino acids,
sugars, fatty acids, and glycerol) and minerals from the soil enter the potato cell.
Matter change: The small organic molecules (monomers) and soil minerals are
combined together to make large organic molecules (polymers), such as
carbohydrates, fays/lipids, and proteins. Water is produced during this process.
Energy change: The chemical energy stored in the C-C and C-H bonds in the small
organic molecules (monomers) stays in these bonds when they are combined
into large organic molecules (polymers). The polymers still have chemical energy
in C-C and C-H bonds after biosynthesis.
Matter movement: The cell grows bigger and may eventually divide as more
large organic molecules (polymers) are made.
17
Discuss with a partner
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