Question

question 20 (1 point) a photosystem is a group of chlorophylls and proteins. an embedded cluster of electron carriers. the thylakoid of the chloroplast. another name for chlorophyll a and b. a collection of enzymes in the stroma.

Explanation:

A photosystem is a complex that consists of a group of chlorophylls and associated proteins which capture light - energy during photosynthesis. It is not just a cluster of electron carriers, the thylakoid itself, another name for chlorophylls, or a collection of stroma - located enzymes.

Answer:

A. a group of chlorophylls and proteins.