Suppose one strand of a "mini-gene" has the base sequence TACCCGGATTCA. The last codon in the mRNA sequence will be
A) TCA. B) UGA. C) AGT. D) AGU.
D
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Notch and Delta are both transmembrane proteins involved in cell communication in the developing nervous system of vertebrate animals. What makes Notch different from Delta?
A. Notch is a receptor and Delta is a signaling molecule. B. Notch is a signaling molecule and Delta is a receptor. C. Notch is required at higher density than Delta to alter cell fate. D. All of the above statements are correct.
Which of the following is true of the actinomycetes?
A. Some are photosynthetic. B. They closely resemble the fungi in morphology. C. They divide by budding. D. They are unique among prokaryotes in producing sexual spores.
Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
What will be an ideal response?
Refer to Figure 44-2. Cell type__________ is/are primarily responsible for the release of histamine in
injured tissues and in allergic responses. a. A only b. B only c. C only d. D only e. A and cell type D