IB Bio: Photosynthesis

Photolysis and carboxylation of RuBP occur during photosynthesis. Where in the chloroplast do these reactions occur?

• A

• B

• C

• D

Tags

NGSS.HS-LS1-5

What is always a consequence of the evaporation of water from mesophyll cells in leaves of a healthy plant?

• Plasmolysis occurs in mesophyll cells.

• Photosynthesis stops.

• Stomata close to reduce transpiration.

• Water moves up the stem in the xylem.

Tags

NGSS.HS-LS1-3

Which of the following processes require(s) ATP during photosynthesis?

• A

• B

• C

• D

Tags

NGSS.HS-LS1-5

The graph shows how the rate of photosynthesis of a green plant varies with CO2 concentration at two different light intensities. The temperature is kept constant at 20 °C. What is the limiting factor at X?

• Chlorophyll

• Light intensity

• Temperature

• CO2 concentration

Tags

NGSS.HS-LS1-5

The cycle shows part of the light-independent reactions in photosynthesis.

What occurs in Step 1?

•   ATP is formed for Step 2.

• Rubisco catalyses the hydrolysis of ribulose bisphosphate.

• A carboxylase catalyses the carboxylation of ribulose bisphosphate.

• NADP is converted to reduced NADP.

Tags

NGSS.HS-LS2-5

NGSS.HS-LS1-6

TThe apparatus shown was used to investigate the effect of varying carbon dioxide concentration on the rate of photosynthesis. Carbon dioxide concentrations were varied by adding different amounts of sodium hydrogen carbonate (NaHCO₃) to water.

What is the dependent variable in this investigation?

• temperature

• light intensity

• amount of NaHCO^3 that was added

• volume of oxygen produced

The image shows part of a section through the stem of a non-woody plant.

Which feature distinguishes the transport of materials in the tissue labelled I from that in the tissue labelled II?

• In II, active transport is used.

• In II, products of photosynthesis are transported.

• In I, movement of materials is the result of transpiration.

• In I, there is a higher solute concentration.

Tags

NGSS.HS-LS2-3

The graph shows the effect of limiting factors on the rate of photosynthesis. What can be concluded from this graph?

• At a CO2 concentration of 0.1% and a low light intensity, temperature is the only limiting factor.

• At a CO2 concentration of 0.1% and a low light intensity, light intensity is the only limiting factor.

• At a CO2 concentration of 0.03% and a low light intensity, both CO2 concentration and temperature are limiting factors.

• At a CO2 concentration above 0.1%, there are no limiting factors.

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-3

During photosynthesis plants use water in the conversion of light energy to chemical energy.

State the name of this process.

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

During photosynthesis, plants use water in the conversion of light energy to chemical energy.

How is water used in photosynthesis?

Tags

NGSS.HS-LS1-5