Biological membranes are held together mainly by
a. hydrogen bonds between lipid molecules.
b. hydration layers over lipid molecules.
c. exclusion of the nonpolar regions of lipids by water.
d. hydrogen bonds between water molecules.
e. surface tension at the interface between layers of water molecules.
C
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Asexual spores such as conidia develop by the process of ________.
A. parthenogenesis B. mitosis C. fission D. meiosis
__________ covers and protects the outer surfaces of primary plant parts. Fill in the blank(s) with the appropriate word(s)
________ wrap aroung neurons in the preiheral nervous system, covering them with layers of plasma membrane.
A. Schwann cells B. oligodendrocytes C. microglia D. astrocytes
If the codon AAA is changed to AAG, it still codes for the amino acid lysine; this is an example of a
A) silent mutation. B) nonsense mutation. C) frameshift mutation. D) dimer formation. E) missense mutation.