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the backbone of sugar molecules is
a. carbon
b. oxygen
c. nitrogen
d. sulfur

How can you tell the difference between rough er from smooth er?

Which of the following describes how binary fission and mitosis are similar? a)they are both used for growth or repair b)they both break down membrane-bound nuclei c)both invoke the replication of a single stand of dna d)both replicate genetic material

The direct energy source that drives atp synthesis during respiratory oxidative phosphorylation is