Interaction between two distinct polypeptide chains is what type of structure in a protein?
A) primary structure
B) secondary structure
C) tertiary structure
D) quaternary structure
E) both primary and secondary structure
D) quaternary structure
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Photosynthesis spread through most of the eukaryotic superkingdoms by repeated episodes of endosymbiosis of photosynthetic eukaryotic organisms
A. true B. false
Antigen binding sites on one antibody:
a. are the same as on all other antibodies b. will bind to several different antigens c. are unique and specific to one antigen d. consist of light chain variable regions only e. are the same as all membrane bound receptors
Mitotic cell division results in two identical cells by replicating the cell's DNA and then dividing .
A. None of the answer choices is correct. B. once; once C. twice; twice D. twice; once E. once; twice
Loss of the cell wall is required for the endosymbiotic theory.
a. true b. false