Animalscaretips
- What is meant by a reading frame?
- What is a reading frame in DNA?
- What is a reading frame in mRNA?
- What is a reading frame and how is it established?
- What is an example of a reading frame?
- What determines the reading frame?
- Why is the reading frame important?
- What is the difference between a reading frame and an open reading frame?
- Where does the reading frame start?
- How many reading frames are there in DNA?
- What is a reading frame quizlet?
- How many reading frames are applicable in case of translation?
- Why are there 3 reading frames?
- What can happen if the reading frame is altered?
- Why does DNA have 6 reading frames?
- Which reading frame is most likely a part of a larger ORF?
- Does a promoter need to be in frame?
What is meant by a reading frame?
Definition of reading frame
: a sequence of nucleotide triplets that is potentially translatable into a polypeptide and that is determined by the placement of a codon that initiates translation.
What is a reading frame in DNA?
In molecular biology, a reading frame is a way of dividing the sequence of nucleotides in a nucleic acid (DNA or RNA) molecule into a set of consecutive, non-overlapping triplets.
What is a reading frame in mRNA?
The codons in the middle known as the reading frame, determine which amino acids will be placed into the protein. The AUG start codon establishes the beginning of the reading frame on a mRNA. The ribosome must follow this reading frame to build the correct protein.
What is a reading frame and how is it established?
A sequence of bases in messenger RNA (or deduced from DNA) that encodes for a polypeptide. Since each coding unit (codon) of the genetic code consists of three consecutive bases, the reading frame is established according to precisely where translation starts.
What is an example of a reading frame?
One of the three possible ways of reading a nucleotide sequence. For example: given the nucleotide sequence: AGCAGCAGC, the three reading frames are: AGC AGC AGC, GCA GCA, CAG CAG. ...
What determines the reading frame?
To identify an open reading frame: Locate a sequence corresponding to a start codon in order to determine the reading frame – this will be ATG (sense strand) Read this sequence in base triplets until a stop codon is reached (TGA, TAG or TAA)
Why is the reading frame important?
Once a gene has been sequenced it is important to determine the correct open reading frame (ORF). Every region of DNA has six possible reading frames, three in each direction. The reading frame that is used determines which amino acids will be encoded by a gene.
What is the difference between a reading frame and an open reading frame?
Open reading frames (ORFs) are parts of a reading frame that contain no stop codons. A reading frame is a sequence of nucleotide triplets that are read as codons specifying amino acids; a single strand of DNA sequence has three possible reading frames.
Where does the reading frame start?
A reading frame refers to one of three possible ways of reading a nucleotide sequence. We can start translating, or reading, the DNA from the first letter, 'a,' which would be referred to as the first reading frame. Or we can start reading from the second letter, 'c,' which is the second reading frame.
How many reading frames are there in DNA?
Since DNA is interpreted in groups of three nucleotides (codons), a DNA strand has three distinct reading frames. The double helix of a DNA molecule has two anti-parallel strands; with the two strands having three reading frames each, there are six possible frame translations.
What is a reading frame quizlet?
The reading frame refers to how the nucleotides in a nucleic acid molecule are grouped into codons, with each codon containing three nucleotides. Any sequence of nucleotides has three potential reading frames that have completely different sets of codons.
How many reading frames are applicable in case of translation?
How many reading frames are applicable in case of translation? Explanation: As the codons are immediately adjacent to each other and because the codons are three nucleotides long, any stretch of mRNA can be translated into three different reading frames.
Why are there 3 reading frames?
Because three of the 64 possible DNA triplets correspond to mRNA stop codons, a DNA sequence read at random will have stop triplets approximately once in every 20 triplets. The occurrence of multiple stops in a particular reading frame indicates that it does not code for a polypeptide: this is a "closed" reading frame.
What can happen if the reading frame is altered?
Frameshift Mutation
Each group of three bases corresponds to one of 20 different amino acids used to build a protein. If a mutation disrupts this reading frame, then the entire DNA sequence following the mutation will be read incorrectly.
Why does DNA have 6 reading frames?
The longer an open reading frame is, the longer you get before you get to a stop codon, the more likely it is to be part of a gene which is coding for a protein. ... So it's actually six different reading frames for every piece of DNA, which might give you an open reading frame.
Which reading frame is most likely a part of a larger ORF?
Which reading frame is most likely a part of a larger ORF? Whereas there are potential reading frames for any sequence of DNA, an open reading frame contains part of a protein coding sequence.
Does a promoter need to be in frame?
The promoter does not need to be in-frame with the ATG. bob1 on Sun Feb 2 21:43:47 2014 said: Usually what happens is that the promoter modifies how often something is transcribed and includes a RNA polymerase binding site.
