Answer:
Sulfolobus quinone is used to shuttle electrons from a membrane-bound hydrogenase to the sulfur reductase.
Explanation:
I think It is the bottom one
I think it might be energy, but I’m not 100% sure.
Since there are no choices to choose from, I'll just site all the structures of the leaf with its role then.
A Leaf has the following structures:
Cuticle
Upper epidermis layer
Palisade layer
Xylem
Phloem
Spongy mesophyll layer
Air space
Lower epidermis layer
Stomata
<span>Guard cells</span>
Answer should be D. Protein
