Which of the following is not true of the stringent response?
A. Uncharged tRNA binds to the A site of the ribosome.
B. Stringent factor binds to the ribosome.
C. ppGpp nucleotide is synthesized in two steps.
D. ppGpp binding to the ribosome increases rRNA gene expression.
D
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Purines and pyrimidines are precursors for synthesis of ________.
A. fatty acids B. peptidoglycan C. nucleic acids D. proteins
Controversy surrounds the use of zinc-containing nasal sprays as a cold remedy, since they have been associated with anosmia (loss of smell). If true, this is likely due to the sprays damaging which tissue?
A. central nervous system B. osmic nerve C. peripheral nervous system D. neuroglial system Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about olfaction? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The leaves of ferns are called
a. epiphytes. b. stems. c. fronds. d. bracts. e. rhizomes
Mendel's second law of independent assortment has its basis in which of the following events of meiosis I?
A) synapsis of homologous chromosomes B) crossing over C) alignment of tetrads at the equator D) separation of cells at telophase