AP Biology Photosynthesis Exam

Plants use the following reactants for the light reaction

• Water and CO2

• Water and NADPH

• Water and NADP+

• NADPH and ATP

Photosynthesis goal is to

• convert light energy into glucose energy

• use light energy to make oxygen gas

• convert sugar energy into ATP

• convert sugar energy into oxygen gas

Tags

NGSS.HS-LS1-5

Rubisco is important in which step of photosynthesis

• energizing the electrons in chlorophyll

• carbon fixation when CO2 is connected to RUBP during calvin cycle

• regeneration phase as RUBP is made during calvin cycle

• reduction of the carbon chain during the calvin cycle

If the proton (H+) pump in the thylakoid was not working which molecule could not be made during the light reaction?

• NADPH

• ATP

• Water

• Oxygen gas

Tags

NGSS.HS-LS1-5

The NADP+ is

• oxidized during the light reaction

• reduced during the light reaction

• oxidized during the Calvin cycle

• reduced during the Calvin cycle

Which of the following would have the least affect on photosynthetic rate?

• increase the temp from 20 C to 30 C

• increasing the CO2 from 400 ppm to 600ppm

• increasing the light intesity from 40 Watts to 60 Watts

• increasing the amount of O2 from 20% to 30% in the air

Tags

NGSS.HS-LS1-5

Plants obtain CO2 into the chloroplast by

• active transport

• diffusion

• facilitated diffusion

• endocytosis

Photosystems are made of

• chloroplasts

• chromosomes

• chlorophyll

• cytoplasm

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

ATP is made during the light reaction using all of the following EXCEPT

• proton pump

• hydrogen ion gradient

• electron energy from photosystem II

• NADPH donating electrons

Tags

NGSS.HS-LS1-5

What is FALSE about the calvin cycle

• uses the light reactions products

• produces a three carbon sugar (G3P)

• produces carbon dioxide

• produces NADP+

Tags

NGSS.HS-LS2-5