___1. The genetic code is different in nearly all organisms ___2. Cells regulate
ID: 2411 • Letter: #
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___1. The genetic code is different in nearly all organisms ___2. Cells regulate gene expression so that each gene will betranscribed only when it is needed. ___3. Gene expression is prevented when a repressor binds tothe group of genes involved in the same function. ___4. Repressor proteins are bound to the DNA in front of eachgene, readily allowing transcription to take place as the RNApolymerase moves along that gene. ___2. Cells regulate gene expression so that each gene will betranscribed only when it is needed. ___3. Gene expression is prevented when a repressor binds tothe group of genes involved in the same function. ___4. Repressor proteins are bound to the DNA in front of eachgene, readily allowing transcription to take place as the RNApolymerase moves along that gene.Explanation / Answer
TRUE 2. Cells regulate geneexpression so that each gene will be transcribed only when it isneeded.- Cells regulate gene expression to only transcribe whenneeded as to not waste vital resources.
TRUE 3. Gene expression is prevented whena repressor binds to the group of genes involved in the samefunction.
- The repressor protein binds to the operator, a genesequence on the DNA stand, to prevent transcription of mRNA.
FALSE 4. Repressor proteins are boundto the DNA in front of each gene, readily allowing transcription totake place as the RNA polymerase moves along that gene.
- When the repressor protein is bound to DNA, there isno transcription.
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