What types of molecules may NOT need transport proteins to be able to cross cytoplasmic membranes?
A) large molecules
B) ions
C) small hydrophobic molecules
D) small hydrophilic molecules
E) nothing crosses cytoplasmic membranes without transport proteins
C
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At the end of meiosis II, each of the four resulting cells contains
A. one full set of chromosomes, each with 2 molecules of DNA. B. two full sets of chromosomes, each with 2 molecules of DNA. C. one full set of chromosomes, each with 1 molecule of DNA. D. two full sets of chromosomes, each with 1 molecule of DNA.
How is the syphilis spirochete initially transmitted?
A) penetration of unbroken skin B) through the eyes C) from mother to child D) through tiny breaks in the skin epithelial layer
During the clonal production of appropriate B cells, what two types of cells are produced? What are their respective functions?
What will be an ideal response?
__________ are multicelled heterotrophs without cell walls.
Fill in the blank(s) with the appropriate word(s).