Why must mRNA molecules be formed from the DNA code during transcription?

Answer 1

The DNA has the code for making proteins, but the DNA must stay in the nucleus of the cell. mRNA is formed to take the information to a ribosome where the protein is built.

Answer 2

first the dna is too big to come out of the nucleus...secondly the protein 'factories' are outside the nucleus and thirdly..the dna is seperated from the cellular cytoplasm in the first place for a reason namely protect it...also it would be troublesome to bring the dna out juz to make a specific protein...in the current way the mrna is transcribed with jus the neccessary coding to make the amino acids for the protein needed..the mrna then comes out of the nucleus goes to the manufacturing site..there it gets bound to the ribosome and with the help of trna gets translated into the corresponding protein...simple as that...

Answer 3

duh, so it can make another DNA strand in the new cell. ALSO the new DNA is not a perfect copy. The RNA has been damaged by solar radiation, this gives the appearance of aging that we have. Now the new, lets say radiated DNA, will copy itself through mitosis, and again the RNA is damaged by solar radiation, so the the copy of the copy of the copy, appears to be aging, but this is the mRNA, copying a cell whose information has been altered, and then passed on until certain groups of cells can not function properly.

Answer 4

mRNA is messenger rna is a direct copy of the dna. it must be taken directly from the dna for there to be no mutations which still happen

Answer 5

Its the complementary strand to the DNA. mRNA and tRNA combine during translation to form protein

Answer 6

DNA is too big to leave the nucleus

Answer 7

B. Because in DHA Guanine corresponds to Cytosine, Thymine corresponds to Adenine, but in RNA there is no T. Instead there is Uracil. So, Adenine corresponds to Thymine in RNA.