A Biologist Ground Up Some Plant Leaf Cells and Then

question 34

Multiple Choice

A biologist ground up some plant leaf cells and then centrifuged the mixture to fractionate the organelles. Organelles in one of the heavier fractions could produce ATP in the light, whereas organelles in the lighter fraction could produce ATP in the dark. The heavier and lighter fractions are most likely to contain, respectively,

• A) mitochondria and chloroplasts.
• B) chloroplasts and peroxisomes.
• C) peroxisomes and chloroplasts.
• D) chloroplasts and mitochondria.
• E) mitochondria and peroxisomes.

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