Refer to the accompanying figure. The structure labeled as 7 in the figure of the tryptophan operon is a(n):
a. active repressor protein.
b. inactive repressor protein.
c. active RNA polymerase.
d. inactive RNA polymerase.
e. ribosome.
b
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The term herbaceous implies that a plant
A. is only found in wet environments. B. has not developed a secondary vascular tissue. C. probably will live several years. D. has no apical meristem. E. lacks vascular tissue.
The degeneracy of the genetic code refers to the fact that
a. the code has some codons that do not specify an amino acid. b. the code has most amino acids represented by more than one codon. c. the code varies considerably between different organisms. d. the code is commaless, with no indicators of spaces between codons. e. the code varies considerably between different cell types within a multicellular organism.
Steriod hormones are effector molecules
Indicate whether the statement is true or false
Borrelia burgdorferi is an unusual bacterium that lacks iron-containing enzymes and proteins and causes (Brill-Zinser/Lyme/RMSF) disease in humans.
Fill in the blank(s) with the appropriate word(s).