Which of these is a function of the plasma membrane?
Maintains structural integrity of the cell
Is selectively permeable to regulate movement of substances into and out of the cell
Contains glycoproteins to provide recognition between cells
All of these are functions
D. All of these are functions
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Why might a point mutation in DNA make a difference in the level of a protein's activity?
A) It might result in a chromosomal translocation. B) It might exchange one stop codon for another stop codon. C) It might delay the rate of DNA replication. D) It might substitute a different amino acid in the active site. E) It might substitute the N-terminus of the polypeptide for the C-terminus.
_________________________ is the anaerobic breakdown of glucose to pyruvates.
A.) Kreb's cycle B.) electron transport chain C.) glycolysis D.) fermentation
____ are examples of trace fossils.
A. Skeletons B. Shells C. Seeds D. Footprints E. Leaves
Vaccination is available for all the following EXCEPT
A) Haemophilus meningitis. B) Neisseria meningitis. C) tetanus. D) rabies. E) botulism.