Gap genes and pair-rule genes are examples of genes that determine _____
A. the formation of body segments
B. the formation of the primary cell layers
C. the formation of cellular adhesion
D. the formation of the major body axis
A
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In phage ?, the relative affinities of the lambda repressor and the cro protein to the three binding sites in the OR region are:
A. the same. B. inversely proportional C. unrelated.
Metabolic wastes clog and fill the oldest ________, producing heartwood
a. xylem b. vascular cambium c. primary phloem d. secondary phloem
Which set of codons terminate transcription in most organisms?
A. ACT, TAC, ATT B. UGA, UAG, UAA C. TGA, TAG, TAA D. AGU, UAG, UAA
Which of the following is relatively unimportant for the recognition of the promoter by sigma factor?
a. the -35 box b. the length of the region between the -10 element and -35 box c. the -10 element d. the sequence surrounding the startpoint e. the sequence of the region between the -10 element and -35 box