Question

multiple choice question
what is the antenna complex?

the enzyme that splits water and replaces the electron lost from chlorophyll

the part of a photosystem that contains the pigment molecules

the arrangement of the two photosystems and electron carriers within the thylakoid membrane

the protein that receives energy from electrons and uses it to pump protons across the membrane

Explanation:

To determine the correct answer, we analyze each option:

• The first option describes an enzyme involved in splitting water (like photosystem II's water - splitting complex), not the antenna complex.
• The second option: The antenna complex is indeed the part of a photosystem that contains pigment molecules (such as chlorophyll and accessory pigments) which absorb light energy and transfer it to the reaction center.
• The third option refers to the electron transport chain and the arrangement of photosystems and electron carriers in the thylakoid membrane, not the antenna complex.
• The fourth option describes a protein involved in proton pumping (like cytochrome complex), not the antenna complex.

Answer:

B. the part of a photosystem that contains the pigment molecules