Table of Contents
- 1 What happens if both the strand of DNA are transcribed into RNA at same time?
- 2 Is it possible to have two different DNA codes that result in the same protein?
- 3 What happens when both the strands of DNA used as template of DNA transcription?
- 4 What happens to a DNA strand during the process of transcription?
- 5 Why both the strands of DNA do not undergo transcription?
- 6 How is it possible for a single gene to encode more than one polypeptide?
What happens if both the strand of DNA are transcribed into RNA at same time?
The two RNA molecules, if produced simultaneously would be complementary to each other, hence would form a double stranded RNA.
Is it possible to have two different DNA codes that result in the same protein?
Proteins are built from 20 different amino acids, chained together in various combinations. The genetic code is redundant, so that several codons represent the same single amino acid, but there are no ambiguities. There are no examples of a single codon within any genome that represents more than one amino acid.
Can both DNA strands be transcribed?
Unlike DNA replication, in which both strands are copied, only one strand is transcribed. The strand that contains the gene is called the sense strand, while the complementary strand is the antisense strand.
How is it possible for a single gene to code for two different proteins in eukaryotes?
Gene splicing is a post-transcriptional modification in which a single gene can code for multiple proteins. Gene Splicing is done in eukaryotes, prior to mRNA translation, by the differential inclusion or exclusion of regions of pre-mRNA. Gene splicing is an important source of protein diversity.
What happens when both the strands of DNA used as template of DNA transcription?
In transcription, a portion of the double-stranded DNA template gives rise to a single-stranded RNA molecule. Often, however, transcription of an RNA molecule is followed by a translation step, which ultimately results in the production of a protein molecule.
What happens to a DNA strand during the process of transcription?
Transcription is the process in which a gene’s DNA sequence is copied (transcribed) to make an RNA molecule. 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.
Is it possible that two genes with different nucleotide sequences have same protein sequence?
Yes it is seems to be a case of random mutations and positively selected for right degenerate codons. I have done more research on it, most adjacent genes in both strands are having same condition but two genes in reverse strand are normal (having both nucleotide and protein matches in nr/nt database).
Which DNA strand is transcribed to mRNA?
The upper strand of DNA is the “mRNA-like” strand. The lower strand is the strand that is complementary to the mRNA. The -35 region (TTGACA) and -10 region (TATATT) of the promoter sequence and the transcriptional start site (the A) is indicated on the coding strand.
Why both the strands of DNA do not undergo transcription?
(i) Both strands of DNA are not copied during transcription. One segment of the DNA would be coding for two different proteins, and this would complicate the genetic information transfer machinery. Second, the two RNA molecules if produced simultaneously would be complementary to each other.
How is it possible for a single gene to encode more than one polypeptide?
How is it possible for a single gene to encode more than one polypeptide? Exons in mRNA can be spliced together in different combinations. In translation, tRNA molecules bring amino acids to the ribosome.