Outline the basic differences in function among RNA polymerases in both prokaryotes and eukaryotes
What will be an ideal response?
Only one type of RNA polymerase is found in prokaryotes, so all classes of genes are transcribed by it. Eukaryotes have three distinct RNA polymerases, each of which transcribes different gene types. RNA polymerase I transcribes the genes for the 28S, 18S, and 5.8S ribosomal RNAs; RNA polymerase II transcribes mRNA genes and some snRNA genes; and RNA polymerase III transcribes genes for the 5S rRNAs, the tRNAs, and the other snRNAs.
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Which of the following is not a basic need of the cell?
A) molecular building blocks B) 100% efficiency C) energy D) information E) chemical catalysts
Which of the following characteristics are shared by all living organisms?
I. hereditary information is passed to offspring II. adaptation to environmental change III. requirement for nutrients IV. DNA housed in a nucleus
a. I and II b. I and III c. II and III d. I, II, and III e. I, II, III, and IV
Many times species are composed of networks of distinct populations called metapopulations. When do metapopulations occur?
A. When a population is large and uniformly distributed. B. When a population in poor habitat continually sends out dispersers to bolster populations in better habitats. C. When a population in a better habitat does not send out colonizers into less suitable habitats. D. When suitable habitat is patchily distributed and separated by areas of unsuitable habitat.
All living things are made of _____.
Fill in the blank(s) with the appropriate word(s).