本题目来源于试卷: Unity and Diversity A.4 Cell Structure，类别为 IB生物学
[单选题]
Which organism contains-opy;yc1ct vef ,d ;)p:iayd) u 9ie9l DNA in exactly two different organelles?
A. A tree
B. A mushroom
C. An Archaeon
D. A seaweed
参考答案: B
本题详细解析:
All eukaryotic organisms contain organiskh.faplovv x30(mk t3( 5 6cxfmal DNA in the cell nucleus and mitochondrial DNA in the mitochondria. Photosynthetic organisms additionally contain DNA in the chloropl0x mxft (v563lkfkvc o.h3p( aasts. So, an organism that is a eukaryote but not photosynthetic contains DNA in exactly two organelles. A mushroom is a non-photosynthetic eukaryote, so a mushroom contains DNA in exactly two organelles.
A tree (Choice A) and a seaweed (Choice D) each contain DNA in three organelles (nucleus, mitochondria, and chloroplasts). An Archaeon (Choice C) lacks membrane-bound organelles; its DNA is contained within the cytoplasm.
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