Sulfanilamide is an antibacterial drug that inhibits dihydropteroate synthetase, an enzyme that converts para-aminobenzoic acid (PABA) to folic acid (which is required for the synthesis of bacterial nucleic acids)
Sulfanilamide is a structural analog to PABA so most likely is a(n)______________ inhibitor of dihydropteroate synthetase.
A. analogic inhibitor
B. uncompetitive inhibitor
C. mixed inhibitor
D. competitive inhibitor
E. allosteric inhibitor
D
You might also like to view...
Match the choice on the left with the choice on the right.
A) TATA box B) disulfide bonds C) ribosome D) subassembly E) ethylene and carbon dioxide F) lipase G) nitrogen gas H) addition of monomer I) ionic bond J) TMV self-assembly K) disassembly 1) important in renaturation 2) Heinz Fraenkel-Conrat 3) condensation reaction 4) examples of double bond 5) electrostatic interactions 6) requirement of hierarchical assembly
Mendel crossed true-breeding plants having yellow peas with plants having green peas. The resulting
plants all had yellow peas. An F1 cross resulted in of the plants having yellow peas and of the plants having green peas. What does this tell you about the alleles for color?
a. yellow is usually the dominant color, but sometimes green can be dominant b. green is the dominant color c. yellow is the dominant color d. yellow is the recessive color e. the F1 plants must have had some green peas that went unnoticed.
Keeping internal conditions within tolerable
limits is called
a. maintenance. b. anatomy. c. physiology. d. homeostasis. e. equilibrium
Imagine that you self-pollinate heterozygous purple-flowered, long-pollened pea plants and get mostly purple-flowered, long-pollened plants and white-flowered, short-pollened plants, with a few purple-flowered, short-pollened or white-flowered, long-
pollened plants. What is the most likely explanation? A) Long pollen is often lethal, so few plants with long pollen survive to adulthood. B) The genes for flower color and pollen length are linked. C) The purple allele influences pollen to become shorter. D) The gene for flower color is on a sex chromosome. E) This is a normal random variation from the expected ratio for independent assortment.