Which of these cannot pass through the filtration membrane?
A. water
B. small solutes
C. ions
D. cells
E. glucose
Ans: D. cells
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The tRNA nucleotide sequence that pairs with bases on the mRNA is called a(n)
A. intron. B. exon. C. codon. D. initiation factor. E. anticodon.
All of the following are components of nonspecific immunity EXCEPT
A. skin. B. phagocytes. C. complement. D. lysozyme. E. B cells.
Fossil evidence and other observations have enabled scientists to recognize several trends in hominid evolution. Which of the following trends appeared earliest in hominid evolution?
A) the ability to use language B) the ability to make and use tools C) an increase in the size of the teeth D) the ability to walk upright on two legs
A main function of the carbohydrates that form the glycocalyx is to:
A) maintain the proper fluidity of the plasma membrane. B) regulate water movement into the cell. C) bind cell membranes to the cytoskeleton. D) move large molecules in and out of the cell. E) act as binding sites for signaling molecules.