What is the role of RNA-dependent RNA polymerase in transcription repression in the yeast S. pombe?
What will be an ideal response?
Ans: Sequences within the centromeric heterochomatin are transcribed and converted to dsRNA by RNA-dependent RNA polymerase. The dsRNAs are processed into siRNAs that are recruited by an RNA-induced transcriptional silencing complex (RITS).
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Lamellipodia
A) are found in the basal lamina. B) add structural rigidity to cells. C) contain microtubules. D) are thin sheets of cytoplasm use for cell movement. E) do not involve actin or tubulin.
Individuals and conservation groups have donated funds to buy land in the Monteverde Cloud Forest in Costa Rica. As a result, much of the forest is now protected as a private nature reserve. This is an example of:
a. restoration b. preservation c. ecosystem creation d. ecosystem commercialization e. deforestation
Innate immunity is
a. the body’s first line of defense. b. the body’s second line of defense. c. the body’s third line of defense. d. involved with the production of antibodies. e. associated with all of these.
Which one of the following terms applies to the phylum Arthropoda?
A. deuterostome B. diploblastic C. coelomate D. radial symmetry E. Parazoa