Question

Which of the following is true about transcription factors? They regulate the synthesis of DNA in response to a signal. o They are needed to regulate the synthesis of a protein in the cytoplasm. They control which genes are turned on to form mRNA. O They block the mRNA from being translated.

Answer 1

1C)They control which genes are turn on to form mRNA
Trascription factors are proteins which help in reading the sequence of DNA and convert it in RNA sequence
Some transcription factors are general ones that are found in all cells of a living being. Other translation factors are for specific types of cells
A)explanation
DNA Replication factors incorporate primosotors are replication compounds; DNA polymerase, DNA helicases, DNA clips and DNA topoisomerases, and replication proteins;
B)explanation
The presence of mRNA and the amount and exercises of ribosomes, commencement factors, and elongation factors are the significant controllers of protein union.
D)explanation
Transcription factors have no significant role in in the translation process so synthesis of proteins from are not being bloked by this although their may other factors which regulates the protein synthesis

From all above explanation we can conclude that C se correct answer

2)
1)kinases signal transduction mechanism are activated by phosphorylation of ATP
Explanation
Although signal transduction need both this step but most often in phosphorylation