Table of Contents
What is the mRNA for ATG?
The codon for Methionine; the translation initiation codon. Usually, protein translation can only start at a Methionine codon (although this codon may be found elsewhere within the protein sequence as well). In eukaryotic DNA, the sequence is ATG; in RNA it is AUG.
What is the mRNA sequence for the template strand?
| DNA | Coding Strand (Codons) | 5′ > > > – – – – – – T T C – – – – – – > > > 3′ |
|---|---|---|
| Template Strand (Anti-codons) | 3′ < < < – – – – – – A A G – – – – – – < < < 5′ | |
| mRNA | Message (Codons) | 5′ > > > – – – – – – U U C – – – – – – > > > 3′ |
| tRNA | Tranfer (Anti-codons) | 3′ < < < A A G < < < 5′ |
| Protein | Amino Acid | Amino > > > Phenylalanine > > > Carboxy |
Where is mRNA transcribed?
The process of making mRNA from DNA is called transcription, and it occurs in the nucleus. The mRNA directs the synthesis of proteins, which occurs in the cytoplasm. mRNA formed in the nucleus is transported out of the nucleus and into the cytoplasm where it attaches to the ribosomes.
How is DNA transcribed?
Transcription is the process by which the information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA). Transcription is carried out by an enzyme called RNA polymerase and a number of accessory proteins called transcription factors.
What is the sequence of the mRNA label the ends?
There are three termination codons that are employed at the end of a protein-coding sequence in mRNA: UAA, UAG, and UGA.
What does ACC code for?
Codon-Amino Acid Abbreviations
| Codon | Full Name | Abbreviation (1 Letter) |
|---|---|---|
| ACT | Threonine | T |
| ACC | Threonine | T |
| ACA | Threonine | T |
| ACG | Threonine | T |
How do you find the mRNA sequence?
DNA utilizes four bases, adenine (A), guanine (G), cytosine (C), and thymine (T), in its code. RNA also uses four bases. However, instead of using ‘T’ as DNA does, it uses uracil (U). Therefore, if your DNA sequence is 3′ T C G T T C A G T 5′, the mRNA sequence would be 5′ A G C A A G U C A 3′.
What is a sequence of DNA called?
Narration. DNA consists of a linear string of nucleotides, or bases, for simplicity, referred to by the first letters of their chemical names–A, T, C and G. The process of deducing the order of nucleotides in DNA is called DNA sequencing.
What step begins the process of transcription?
Transcription begins when RNA polymerase binds to a promoter sequence near the beginning of a gene (directly or through helper proteins). RNA polymerase uses one of the DNA strands (the template strand) as a template to make a new, complementary RNA molecule. Transcription ends in a process called termination.
How is the mRNA sequence determined?
The mRNA sequence is determined by the sequence of genomic DNA. In such context, the standard genetic code is referred to as translation table 1. It can also be represented in a DNA codon table.
What is the orientation of the mRNA codons?
The mRNA codons are now shown as white text only, complementing the anti-codons of the DNA template strand. These are displayed from left to right, namely, in the direction in which the mRNA would be synthesized (5′ to 3′ for the mRNA) antiparallel to the DNA coding strand. Finally,…
What is the complementary three nucleotide sequence in the appropriate tRNA?
The anticodon is the complementary three nucleotide sequence in the appropriate tRNA. b. Template strand is the DNA strand off which the mRNA is synthesized. The coding, or non-template, strand is the DNA strand complementary to the template strand; it has the same sequence (except for T for U substitutions) as the mRNA.
What is the complementary strand of mRNA?
As shown schematically above, messenger RNA is synthesized complementary and antiparallel to the template strand (anticodons) of DNA, so the resulting mRNA consists of codons corresponding to those in the coding strand of DNA.