Which of the following are covalent bonds?
A. peptide bonds
B. glycosidic bonds
C. phosphodiester bonds
D. All of the above
Answer D
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According to the endosymbiont theory, host archaea engulfed ___, which then allowed both populations to survive together.
A. photosynthetic archaea B. photosynthetic bacteria C. anaerobic bacteria D. aerobic bacteria E. aerobic archaea
The DNA in eukaryotic cells is packaged into structures called _______________
A.) plasma B.) nucleoids C.) plasmids D.) chromosomes
Mobile prokaryotes can move around with the help of
A) endospores. B) flagella. C) sex pili. D) peptidoglycan. E) plasmids.
Which of the following are antigen-presenting cells?
A. Macrophages B. B cells C. Cytotoxic T cells D. Macrophages and B cells E. Macrophages, B cells and cytotoxic T cells