Coated pits containing clathrin do not permit concentration of ingested macromolecules prior to endocytosis.
Answer the following statement true (T) or false (F)
False
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The ________ have silicate shells and thin pseudopods
A) Amebozoa B) Euglenids C) Ciliates D) Dinoflagellates E) Radiolaria
Members of the genus Mycoplasma are pleomorphic and stain Gram-negative because they
A. lack cell walls. B. have sterols in their cytoplasmic membranes. C. lack cytoplasmic membranes. D. have mycolic acid in their cell walls. E. have a rudimentary cell wall.
Growth of new blood vessels is stimulated by vascular endothelial growth factor (VEGF). This ligand binds to the VEGF receptor, which leads to the dimerization and autophosphorylation of this receptor on cytoplasmic tyrosines. What type of receptor is the VEGF receptor?
A. Enzymatic receptor B. G protein-coupled receptor C. Steroid hormone receptor D. Channel-linked receptor
What hormone regulates the metamorphosis of tadpoles into frogs?
A. Melatonin B. Cortisol C. Estrogen D. Somatotropin E. Thyroid hormone