Animals that do not have a body cavity that separates the gut from the muscles of the body wall are
said to be
a. pseudocoelomate.
b. mesenteries.
c. acoelomate.
d. indeterminate.
e. coelomate.
C
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What is the likely consequence of a mutation that alters the branch point within an intron?
A. failure of snRNAs to combine with protein and form snRNPs B. no exon shuffling C. no effect, since introns are not expressed D. failure to form a lariat E. failure of snRNPs to recognize the 5' end of intron
GTPase activity is involved in the regulation of signal transduction because it
A) increases the available concentration of phosphate. B) decreases the amount of G protein in the membrane. C) hydrolyzes GTP binding to G protein. D) converts cGMP to GTP. E) phosphorylates protein kinases.
A short chain of sugar attached to a protein molecule on the plasma membrane is called
A. a glycocalyx. B. a glycoprotein. C. a protosugar. D. a glycolipid. E. a protomembrane.