Ans.C.Cysteinein assimilatory sulfate reduction the sulfate is tak.pdf

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Ans.C.Cysteine in assimilatory sulfate reduction the sulfate is taken up by the roots of the plant is transported to the shoots. and in the shoots these sulfate is reduced by a series of enzymes. in the shoots the sulfate is activated to APS (adenosine 5\'-Phosphosulfate) then reduced to sulfite by the enzyme APS reductase, and this sulfite is reduced further to sulfide and the sulfide reacts with O- acetylserine and forms Cysteine. Cysteine further forms methionine. the cysteine and methionine have importance and involves in structure and functions of various enzymes. Solution Ans.C.Cysteine in assimilatory sulfate reduction the sulfate is taken up by the roots of the plant is transported to the shoots. and in the shoots these sulfate is reduced by a series of enzymes. in the shoots the sulfate is activated to APS (adenosine 5\'-Phosphosulfate) then reduced to sulfite by the enzyme APS reductase, and this sulfite is reduced further to sulfide and the sulfide reacts with O- acetylserine and forms Cysteine. Cysteine further forms methionine. the cysteine and methionine have importance and involves in structure and functions of various enzymes..

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There are several ways in which the gene regulation in eukaryotes differ from that in prokaryotes, as follows: 1. Prokaryotes are unicellular organisms and do not have defined nucleus, therefore the DNA resides in the cytoplasm. The gene regulation takes place in cytoplasm only i.e. simultaneous transcription and translation. Whereas, eukaryotes are Complex cell structure with a defined nucleus. The DNA is present in nucleus where its transcription takes place into RNA. RNA passes into cytoplasm where its translation takes place into protein. 2 Prokaryotes have naked DNA which are not associated with any protein or other substances to affect gene regulation. Whereas, in eukaryotes DNA forms nucleosomes by wounding around the histone octamers. They are packed within chromatins. This complex structure controls the gene regulation. 3. In prokaryotes all genes are transcribed be same type of RNA polymerase. Whereas, in eukaryotes, there are three different kind of RNA polymerase (I, II and III) involved in gene regulation which are much bigger and complex than prokaryotic RNA polymerase. 4. In prokaryotes the gene expression regulation occurs primarily at transcription stage only. Whereas, in eukaryotes gene expression regulation may occurs at several levels: · Epigenetics: When DNA uncoils for transcription · Transcription: When RNA is transcribed · Post-transcription: When RNA passes into the cytoplasm · Translation: When RNA translates into protein · Post-translation: After protein synthesis. Solution There are several ways in which the gene regulation in eukaryotes differ from that in prokaryotes, as follows: 1. Prokaryotes are unicellular organisms and do not have defined nucleus, therefore the DNA resides in the cytoplasm. The gene regulation takes place in cytoplasm only i.e. simultaneous transcription and translation. Whereas, eukaryotes are Complex cell structure with a defined nucleus. The DNA is present in nucleus where its transcription takes place into RNA. RNA passes into cytoplasm where its translation takes place into protein. 2 Prokaryotes have naked DNA which are not associated with any protein or other substances to affect gene regulation. Whereas, in eukaryotes DNA forms nucleosomes by wounding around the histone octamers. They are packed within chromatins. This complex structure controls the gene regulation. 3. In prokaryotes all genes are transcribed be same type of RNA polymerase. Whereas, in eukaryotes, there are three different kind of RNA polymerase (I, II and III) involved in gene regulation which are much bigger and complex than prokaryotic RNA polymerase. 4. In prokaryotes the gene expression regulation occurs primarily at transcription stage only. Whereas, in eukaryotes gene expression regulation may occurs at several levels: · Epigenetics: When DNA uncoils for transcription · Transcription: When RNA is transcribed · Post-transcription: When RNA passes into the cytoplasm · Translation: When RNA translates into protei.

There are several ways in which the gene regulation in eukaryotes di.pdf

Ans.C.Cysteinein assimilatory sulfate reduction the sulfate is tak.pdf

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Ans.C.Cysteinein assimilatory sulfate reduction the sulfate is tak.pdf