Which type of specimen would be the best for the observation of an endospore within a vegetative cell?
What will be an ideal response?
a 3-5 day old broth or agar culture
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Hominins refers to members of all the different species in the lineage leading to humans
A. true B. false
Vertical evolution arises from Select all that apply.
_____ genetic mutations. _____ sexual reproduction. _____ bacterial conjugation. _____ gene duplication. _____ interspecies exchange of genes.
Excessive heat or extremes of pH often cause denaturation of proteins, which means that the proteins
a. have fallen apart into individual monomer subunits. b. are no longer biological molecules. c. have broken into many separate domains. d. are no longer in a functional three dimensional structure. e. are highly reactive.
Protein X contains four transmembrane domains, a short N-terminus and a long C-terminus. Following protein synthesis, the N-terminus of the protein faces the lumen (the inside) of the ER. After protein X is transported to the cell surface via exocytosis, you would expect the N-terminus of protein X to be
A. extracellular. B. in the lipid bilayer of the plasma membrane. C. in the lumen. D. cytoplasmic.