Biology Unit 4 Bioenergetics

Photosynthesis 1

Give the word equation for photosynthesis

Where exactly does photosynthesis occur?

What molecules could a plant convert the glucose made in photosynthesis into?

If the plant makes amino acids using glucose, what other ion is needed from the soil to do so?

What adaptations do leaves usually have for photosynthesis?

Is the photosynthesis reaction endothermic or exothermic (and why)?

Photosynthesis 2

How do you test a leaf to see if it contains starch?

Why do you put a plant in a dark place for a period of time before doing a photosynthesis experiment where you will test for starch?

When do plants respire?

What will happen to the rate of photosynthesis if you increase the light intensity?

How might very high temperatures (between 30 and 40 degrees C) affect the rate of photosynthesis?

Why is 25 degrees C a better temperature for photosynthesis than 15 degrees C?

Photosynthesis 3

If you keep increasing the carbon dioxide available to a plant, why does the rate of photosynthesis stop increasing after a certain concentration of carbon dioxide?

Besides light, what else could be a limiting factor?

A deficiency in which ion would reduce the amount of chlorophyll a leaf has?

In winter, which factors would limit the rate of photosynthesis?

In a greenhouse, how could you increase the carbon dioxide concentration in the air?

Photosynthesis 4

If you do an experiment with pond weed, what can you measure to see the rate of photosynthesis?

If you were investigating the effect of changing light intensity on rate of photosynthesis, what would your control variables be?

How can you add carbon dioxide to the water for the pond weed in this experiment?

Why might you put the test tube with your pond weed into a large beaker of water for your experiment?

What is the equation that links light intensity and distance?