The rate of diffusion is influenced by ________.
Fill in the blank(s) with the appropriate word(s).
the concentration gradient, membrane permeability, membrane surface area
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Explain how an F' × F- conjugation can produce a partially diploid bacterial cell
What will be an ideal response?
Enzymes in the body catalyze biochemical reactions and ____
a. are chemically changed at the end of the reaction b. are destroyed at the end of the reaction c. are processed into substrate molecules d. convert substrate molecules into products e. convert products into substrate molecules
A mutant bacterial cell has a defective aminoacyl-tRNA synthetase that attaches a lysine to tRNAs with the anticodon AAA instead of the normal phenylalanine. The consequence of this for the cell will be that _____
A) none of the proteins in the cell will contain phenylalanine B) proteins in the cell will include lysine instead of phenylalanine at amino acid positions specified by the codon UUU C) the cell will compensate for the defect by attaching phenylalanine to tRNAs with lysine-specifying anticodons D) the ribosome will skip a codon every time a UUU is encountered
Which class is made up of members commonly called chitons?
a. Cephalopoda b. Scaphopoda c. Polyplacophora d. Gastropoda