In the process of RNA editing adenine or cytosine may be deaminated and the result is
A. Adenine is changed to inosine and cytosine is changed to thymidine
B. Although both bases are covalenty changed there is no alteration in the tRNAs the modified bases may engage
C. The new bases effectively result in new codons
D. Answers adenine is changed to inosine and cytosine is changed to thymidine and the new bases effectively result in new codons are correct (Although both bases are covalenty changed there is no alteration in the tRNAs the modified bases may engage is incorrect)
E. Answers adenine is changed to inosine and cytosine is changed to thymidine and although both bases are covalenty changed there is no alteration in the tRNAs the modified bases may engage are correct (The new bases effectively result in new codons is incorrect)
D
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The only triploid stage in the life cycle of a flowering plant is the:
A. zygote B. embryo C. endosperm D. egg E. stigma tissue
Materials like calcium, sulfur, iron, and many other minerals move within the plant
a. only via xylem. b. only via phloem. c. only in parenchyma. d. in parenchyma and phloem. e. in both xylem and phloem.
Compared to bacteria that have a typical size range between 1-10 ?m,
A. viruses have a much greater size range; between 22 nm and 1000 nm. B. viruses range in size between 20-200 nm and are much larger than bacterial cells. C. viruses are larger and are blocked by sterilizing filters. D. all viruses are 22 nm.
A condition in which the male penis cannot beome erect and remains flaccid is called _____.
A) Sterility B) Spermatogenesis C) Prostate condition D) Erectile dysfunction