How is a stem cell different from a "normal" somatic cell? (Use a liver cell as an example.)
What will be an ideal response?
A "normal" cell has differentiated and is expressing specific genes related to a particular cell type and has turned off genes unrelated to its function. Stem cells have yet to differentiate and have the potential to express any genes they have, depending on the environment they are in.
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Fats, oils, and waxes are called:
a. sugars. b. polysaccharides. c. lipids. d. proteins. e. monomers.
For which of the following is the first amino acid in proteins formylmethionine?
a. Archaea only b. Bacteria only c. both Archaea and Bacteria d. neither Archaea nor Bacteria e. Archaea, Bacteria and Eukarya
A polymer of glycan and peptides found in bacterial cell walls.
A) peptidoglycan B) endosymbiosis C) biomass D) panspermia
Which one of the following is true of the sporophyte stage of a flowering plant?
A. It is dependent on the gametophyte for nutrition. B. It is haploid. C. It is a nonphotosynthetic stage. D. It is the obvious stage, for example an oak tree.