18) The plant Coleus. sometimes turns its hormone here called eaves red. A of fl

Question

18) The plant Coleus. sometimes turns its hormone here called eaves red. A of flowering and "signal" is involved in the regulation IS leaf color. A ndicated pathway (see Figure hypothesized to explain its action All members of a signal transduction pathway are shown. T-bar symbols The action of depicted in Figure 2 are Consistent with the protein that a, removes a phosphate group and thereby inactivates its target proteins modifies nucleosomes and causes chromati decondensation Aat its target gene activates its target phosphate group and thereby rotein gene inhibiting RNA polymerase d nds the promoter of binding e removes introns from RNA arrow symbol depicted in Figure 2 is consistent 19) The with the action of a protein that: at its target modifies nucleosomes and causes chromatin condensation decondensation

Explanation / Answer

18) The T-bar symbol depicted above is consistent with the action of a protein that:

a. modifies nucleosomes and causes chromatin condensation at its target gene-ANSWER

b. modifies nucleosomes and causes chromatin decondensation at its target gene

c. binds the fully translated RNA causing its release from the ribosome

d. binds the promoter of a gene facilitatingRNA polymerase binding

e. removes introns from RNA

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19) The arrow symbol depicted in figure 2 is consistent with the action of a protein that

:a. modifies nucleosomes and causes chromatin condensation at its target gene

b. modifies nucleosomes and causes chromatin decondensation at its target gene-ANSWER

c. binds the partially translated RNA causing its release from the ribosome

d. binds the promoter of a gene opposingRNA pol entry

e. removes introns from RNA

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Chromatin is the state in which DNA is bundled inside the cell. The nucleosome is the basic unit of chromatin and it is made out of an octamer of the four center histones (H3, H4, H2A, H2B) around which 147 base sets of DNA are wrapped. The center histones are prevalently globular with the exception of their N-terminal "tails," which are unstructured. A striking element of histones, and especially of their tails, is the expansive number and sort of changed buildups they have. There are no less than eight unmistakable sorts of changes found on histones .

regards to alterations acetylation, methylation, and phosphorylation.-paly role in color expression

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