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he old dogma of molecular Biology held that for every gene there was one protein (and therefore one mRNA). This is not the case, as we now know. There are many different mRNAs that can arise from a single gene, depending on splicing, promoting and enhancing regions etc. The answer to the first question is 'it depends'-on the gene, the cell conditions etc. Introns were thought of as junk DNA, but they now appear to play at least a minor regulatory role in many cases, as well as influencing splicing etc.
Amino acids can be coded for by a number of different codons (sets of 3 nucleotides, the unit with which the DNA sequence is read and interpreted) due to the DNA sequence redundancy. This means that many of the amino acids found in a chain may have been coded by any of (up to 6) different codon sequences, so you can't tell exactly the DNA sequence just from the amino acid sequence.
(e.g. Argenine is coded by CGI, CGC, CGA and CGG, which means you can't tell which sequence on the DNA coded for the argenine, it could be any of the four possible choices)
What else can I help you with?
Where does the messenger RNA have to travel to after transcription?
The process wherein messenger RNQ (or mRNA) is given a message is called transcription. In this process, n mRNA molecule is made (or transcribed) using DNA as the template. Essentially, the nucleotide sequence on a gene is read by an enzyme called RNA polymerase which synthesizes the mRNA molecule. Put simply, RNA polymerase scans the length of DNA until a gene is encountered. When the enzyme reaches the correct position, it begins adding complimentary nucleotides to make the mRNA molecule. This way, the entire gene is transcribed and copied on to the mRNA molecule.
What is the name of the molecule that replaces thymine in mRNA?
Uracil
What molecule carries a copy of the code from out of the nucleus?
Molecules of Ribonucleic Acid (RNA) carry the instructions for assembling proteins out of the cell nucleus. Without this type of molecule, the cell cannot survive.
How much DNA unzips to make mRNA?
One mRNA strand is made.
What is the name of the process of making mRNA copt of a gene?
The process of making an mRNA copy of a gene is called transcription. During transcription, the DNA of the gene is used as a template to synthesize a complementary mRNA molecule. This mRNA molecule carries the genetic information from the gene to the ribosomes for protein synthesis.
What molecule is not made during transcription?
mRNA
What statement best compares the base sequence of an mRNA molecule with that of the cDNA made from the mRNA?
The base sequence of cDNA is complementary to the mRNA molecule from which it is synthesized. This means that the cDNA will have the same sequence as the mRNA, except that thymine in DNA is replaced with uracil in RNA.
How is mRNA made in the process of protein synthesis?
mRNA is made during protein synthesis through a process called transcription. In transcription, the DNA sequence of a gene is copied into a complementary mRNA molecule by an enzyme called RNA polymerase. This mRNA molecule then carries the genetic information from the DNA to the ribosome, where it is used as a template to assemble amino acids into a protein.
Is mRNA a direct copy of DNA?
mRNA is not a direct copy of DNA, but it is a molecule that carries genetic information from DNA to the ribosomes in the cell where proteins are made.
Which molecule is made in the nucleus but exits to function in the cytoplasm?
mRNA (messenger RNA) is the molecule that is made in the nucleus during transcription, carrying the genetic information from DNA, and then exits to function in the cytoplasm during translation to direct protein synthesis.
Which molecule that fastens amino acids down on mRNA?
The molecule that fastens amino acids down on the mRNA is transfer RNA, or tRNA.
Where does the messenger RNA have to travel to after transcription?
The process wherein messenger RNQ (or mRNA) is given a message is called transcription. In this process, n mRNA molecule is made (or transcribed) using DNA as the template. Essentially, the nucleotide sequence on a gene is read by an enzyme called RNA polymerase which synthesizes the mRNA molecule. Put simply, RNA polymerase scans the length of DNA until a gene is encountered. When the enzyme reaches the correct position, it begins adding complimentary nucleotides to make the mRNA molecule. This way, the entire gene is transcribed and copied on to the mRNA molecule.
True or false During transcription the information on a DNA molecule is rewritten into an mRNA molecule?
True. Strands of DNA are duplicated into mRNA.
How many strands of mRNA are made during the process of transcription?
A single mRNA strand is typically produced but a single strand can make many many copies of the protein encoded on the molecule.
How is mRNA made in a lab?
mRNA is made in a lab through a process called in vitro transcription. This involves using a DNA template and enzymes to synthesize the mRNA molecule. The DNA template is typically a gene of interest that is transcribed into mRNA by RNA polymerase enzyme. The resulting mRNA can then be used for various research purposes, such as studying gene expression or developing vaccines.
MRNA strand is made in the process of what?
mRNA (messenger RNA) is made in the process of transcription, which occurs in the nucleus of a cell. During transcription, the DNA sequence is used as a template to synthesize a complementary mRNA strand. This mRNA molecule then carries the genetic information from the DNA to the ribosomes in the cytoplasm for protein synthesis.
What is the molecule that encodes the genetic code?
mRNa
