Nutrition in plants review

Nutrition in plants review

Chloroplasts!

Open Ended

State the word equation showing the substrates and products of photosynthesis.

______ + ______ → ______ + ______

The word equation looks like this.

Multiple Select

What are the functions of chlorophyll?

• convert carbon dioxide to chemical energy

• convert light energy to chemical energy

• trap light energy

• trap oxygen

Chlorophyll traps light energy and converts it to chemical energy.

After glucose is produced during photosynthesis, it can be used for several things.

What happens to glucose after it's made during photosynthesis

• used respiration

• stored as starch (in leaves and other parts of the plant)

• converted to amino acids or fats

Remember this leaf diagram?

Take some time to revise the structures

Multiple Choice

The leaf is a/an...

• cell

• tissue

• organ

• organ system

Multiple Select

Which leaf cells contain the chloroplasts?

• epidermal cells

• mesophyll cells

• phloem cells

• guard cells

Multiple Choice

Which leaf cells contain the most chloroplasts?

• guard cells

• palisade mesophyll cells

• spongy mesophyll cells

Open Ended

What are the air spaces in the spongy mesophyll layer for?

Multiple Choice

Guard cells and stomata are the same thing.

• True

• False

Let's move on to leaf experiments

We can test leaves for the presence of starch to see if they've been photosynthesising.

Open Ended

Why do leaves that have been photosynthesising contain starch?

If we test this leaf with iodine, what results will we get?

Multiple Choice

The part covered with the black paper will:

• remain brown

• turn blue black

Multiple Choice

The parts exposed to sunlight will

• remain brown

• turn blue black

What will be the results of the starch test?

Multiple Choice

What will be the results of the test for starch?

Recap: A has no CO₂, B has CO₂

• Both A and B turn blue black

• Both A and B remain yellow

• A turns blue black, B remains yellow

• A remains yellow, B turns blue black

One more experiment

Multiple Choice

The rate of photosynthesis is this experiment is measured by the rate of bubbling. What gas is in the bubbles?

• carbon dioxide

• oxygen

• carbon dioxide and oxygen

• water vapour

Open Ended

What are the 3 factors that affect rate of photosynthesis?

Multiple Choice

The concentration of sodium hydrogen carbonate affects the

• light intensity

• carbon dioxide concentration

• oxygen concentration

• temperature

We're almost done : )

One last section.

Limiting factors

When we increase the limiting factor, the rate of reaction increases too.

What is the limiting factor at the red cross?

Multiple Choice

What is the limiting factor at the red cross?

• carbon dioxide concentration

• light intestity

• temperature

• rate of photosynthesis

The limiting factor is light intensity

When light intensity increases, rate of photosynthesis increases.

What is the limiting factor at the blue cross?

Multiple Select

What could be the limiting factors at the blue cross?

• carbon dioxide concentration

• light intestity

• temperature

• rate of photosynthesis

When the graph levels off, the other factors can be limiting factors:

- temperature

- carbon dioxide concentration

Multiple Choice

Which other graph looks like the graph for rate of photosynthesis against light intensity?

• rate of photosynthesis against carbon dioxide concentration

• rate of photosynthesis against temperature

Rate of photosynthesis against temperature looks like this.