AP Biology Photosynthesis and CR Labs

In paper chromatography with plant pigments, the pigment that flows to the top of the paper is most likely

• very soluble in the solvent
• very insoluble in the solvent
• able to create hydrogen bonds with the paper
• able to create covalent bonds with the paper

Which leaf pigments are likely to move the quickest to the top?

• large nonpolar pigments
• small polar pigments
• small nonpolar pigments
• large polar pigments

What is one function of the other pigments  besides chlorophyll, in the chloroplast?

• to block damaging wavelengths of light
• to absorb different wavelengths than the chloroplasts
• to provide different colors to the leaves
• to transfer energy to a separate photosystem beside the one using chlorophyll a and b.

Tags

NGSS.HS-LS1-5

Pigments dissolve differently in different solvents. What might change in the paper chromatography, if you changed the solvent?

• the wide of the bands
• the distance between the bands
• the order of the bands
• the number of bands

What is the role of DPIP in photosynthesis experiments?

• DPIP is an electron acceptor that indicates the rate of the light reaction in photosynthesis
• DPIP is a electron donor that slows the rate of light reactions
• DPIP is an electron transport molecule that fuels the Calvin Cycle
• DPIP is a photon acceptor that donates electrong to Photosystem II

Tags

NGSS.HS-LS1-5

When the rate of photosynthesis is high, you can expect a solution with DPIP in it to become more

• blue
• cloudy
• dark
• clear

Tags

NGSS.HS-LS2-5

NGSS.HS-LS1-5

What would you expect to happen to the % transmittance of light as a spectrophotometer experiment with DPIP proceeds?

• The transmittance will increase indefinitely
• The transmittance will decrease indefinitely
• The transmittance will increase until the liquid is clear
• The transmittance will increase until the liquid is completely dark

In the pea germination lab, which condition showed the highest rate of respiration?

• glass beads
• germinated peas
• non-germinated peas
• cooked peas

Tags

NGSS.HS-LS2-5

NGSS.HS-LS1-7

In the pea and cellular respiration lab, why weren't the plant conducting photosynthesis?

• They were in the dark.
• They were just germinating and had no photosynthetic tissues
• They were developed under artificial conditions
• They were mutant strains of peas.

Tags

NGSS.HS-LS1-5

In the pea germination lab, what is the purpose of KOH (potassium hydroxide)? 

• to absorb the oxygen, so you can measure CO2 production
• to absorb the CO2, so you can measure oxygen consumption

Tags

NGSS.HS-LS2-5

NGSS.HS-LS1-5

NGSS.HS-LS2-4