Question

keystone practice exam
possible points: 1
examine the diagram of a chloroplast.
chloroplasts contain flattened disks known as thylakoids which are stacked into grana. in the thylakoids are proteins that
help capture oxygen from the atmosphere during the process of cellular respiration.
help capture light from the sun during the process of cellular respiration.
help capture light from the sun during the process of photosynthesis.
help capture oxygen from the atmosphere during the process of photosynthesis.

Explanation:

Chloroplasts are involved in photosynthesis, not cellular respiration. Thylakoids in chloroplasts have proteins (like chlorophyll - associated proteins) that capture light from the Sun for photosynthesis. The first option is wrong as oxygen capture isn't the role here and it's not for cellular respiration. The second option is wrong as it's for photosynthesis, not cellular respiration. The fourth option is wrong as oxygen isn't captured from the atmosphere during photosynthesis (photosynthesis produces oxygen). So the correct option is the one about capturing light from the Sun during photosynthesis.

Answer:

help capture light from the Sun during the process of photosynthesis.