3
QuizMultiple Choice

Cell Cycle — Unit test

Question 3 • First Semester Biology

Which term identifies a light-absorbing pigment?

Answer
A
photosystem
B
ferredoxin
C
thylakoid
D
chlorophyll

Explanation

Chlorophyll is the pigment that absorbs light energy during photosynthesis. A photosystem is a protein-and-pigment complex, ferredoxin is an electron carrier, and a thylakoid is a membrane structure in chloroplasts.

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