THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Translation would slow down but continue.
|
|
|
Translation would stop if no mRNA was formed.
|
|
|
Translation would not be affected because they are two different processes.
|
|
|
Translation would speed up because it would not have to wait for products from transcription.
|
Detailed explanation-1: -If no stop codons are present, a polypeptide chain continues to grow until there are no codons left on the mRNA strand. DNA transcription is not an exact process and the invisible stop codon in DNA (invisible because it is not understood or read) is followed by a long tail of nucleotide bases.
Detailed explanation-2: -In transcription, a DNA double helix is denatured to allow the enzyme to access the template strand. In translation, no such denaturing is necessary, as the template is a single mRNA strand.
Detailed explanation-3: -Lastly, termination occurs when the ribosome reaches a stop codon (UAA, UAG, and UGA). Since there are no tRNA molecules that can recognize these codons, the ribosome recognizes that translation is complete. The new protein is then released, and the translation complex comes apart.
Detailed explanation-4: -If a gene is not transcribed in a cell, it can’t be used to make a protein in that cell. If a gene does get transcribed, it is likely going to be used to make a protein (expressed). In general, the more a gene is transcribed, the more protein that will be made.