Question

select all that apply select all of the following that are true about chlorophyll a and b. one absorbs red and orange light and the other reflects it. they have the same absorption spectrum. they differ slightly in their chemical side groups. they capture photons with a magnesium ion.

Explanation:

1. Analyze the first option: Chlorophyll a and b both absorb red and blue - violet light (with some differences in absorption peaks), and neither reflects red and orange light in a way that one absorbs and the other reflects. So this option is false.
2. Analyze the second option: Chlorophyll a and b have different absorption spectra. Chlorophyll a absorbs more red - orange light and chlorophyll b absorbs more blue - green light. So this option is false.
3. Analyze the third option: Chlorophyll a and b differ slightly in their chemical side groups (the porphyrin ring structure has some differences in side chains), which is a true statement.
4. Analyze the fourth option: Both chlorophyll a and b have a magnesium ion at the center of the porphyrin ring, and this magnesium ion is involved in capturing photons (as part of the light - absorbing structure). So this option is true.

Answer:

• They differ slightly in their chemical side groups.
• They capture photons with a magnesium ion.