AP Bio Photosynthesis

Which wavelength of light in the figure is most effective for absorbance of chlorophyll a?

• 400 nm

• 450 nm

• 600 nm

• 675 nm

Tags

NGSS.HS-LS1-5

During photosynthesis, electrons travel downhill in which sequence?

• food → NADH → electron transport chain → oxygen

• glucose → pyruvate → ATP → oxygen

• water → photosystem II → electron transport chain → NADPH

• light → electron transport chain → chlorophyll --> ATP

Tags

NGSS.HS-LS1-5

Where are the proteins of the electron transport chain used in photosynthesis located?

• thylakoid membrane

• stroma

• chloroplast outer membrane

The primary role of water in photosynthesis is to

• act as an acceptor for electrons and hydrogen, forming water.

• Be split and act as a source of electrons.

• combine with carbon, forming CO2.

• combine with lactate, forming NADPH.

To test the hypothesis that a particular plant synthesizes storage lipids by using G3P from photosynthesis, a researcher plans to use radiolabeled precursors to track the molecules through the biosynthetic pathway. Which of the following radiolabeled precursors is most appropriate for the research to use?

• 15Nitrogen-labeled N2, because atmosphere nitrogen is fixed to amino acids by photosynthesis.

• 14Carbon-labeled CO2, because atmosphere carbon is fixed to carbohydrates by photosynthesis.

• 35Sulfur-labeled methionine, because amino acids are incorporated into lipids during photosynthesis.

• 32Phosphorous-labeled phosphate, because lipids are stored in plants as phospholipids.

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

T or F: Autotrophs, but not heterotrophs, can nourish themselves beginning with carbon dioxide and other nutrients that are entirely organic

• True

• False

Tags

NGSS.MS-LS1-6

Which of the following events occurs in the light reactions of photosynthesis?

• NADP+ is produced

• ATP is consumed to yield ADP

• light is absorbed and funneled to  chlorophyll a

• carbon dioxide is fixed in organic molecules

Tags

NGSS.HS-LS1-5

The light reactions occur in the ________ and the calvin cycle takes place in the ________.

• Chloroplast / thylakoid membrane

• stroma / thylakoid

• mesophyl / stomata

• thylakoid membrane / stroma

Tags

NGSS.HS-LS1-5

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

Where does the oxygen produced in the light dependent reactions of photosynthesis come from?

• chlorophyll

• carbon dioxide

• the atmosphere

• water