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Transcription Process | Gene Expression | From DNA To mRNA | Class 12 Biology
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Hi Everyone! Welcome To My Channel "Ali Academy Biology Lectures"
About This Video ........................
In This Video Lecture You Will Learn Basic Concept Of Transcription
This is the process in which an RNA copy of the DNA sequence encoding the gene is
polymerase II, which synthesizes mRNA and RNA polymerase III which synthesizes
The opposite strand is called coding strand or the sense strand. The RNA polymerase
tRNA.
also called -35 sequence and TAT A AT sequence also called -10 sequence, which have
The binding of RNA polymerase to the promoter is the irst step in gene transcription.
ainity for the RNA polymerase. In eukaryotes these sites are at -75 and -25 sites,
of DNA are transcribed. This strand is called template strand or the antisense strand.
from the bubble (Fig 20.25). The stop sequences at the end of the gene terminate the
followed by four or more U ribonucleotides. The hairpin causes RNA polymerase to
and completes the transcription of the gene. The DNA strands open up at the place
synthesis of mRNA. The simplest stop signal is a series of GC base pairs followed by a
polymerase in prokaryote which is responsible for the synthesis of all the three types
and the remaining part of the enzyme (core enzymes) moves over template; strand
produced with the help of an enzyme, RNA polymerase. Only one of the two strands
of RNAs viz. rRNA, mRNA and tRNA. On the other hand there are three types of RNA
of transcription process. Once the transcription has started the sigma factor is released
where enzyme is attached to the templete strand forming transcription bubble. The
Transcription starts at the RNA polymerase binding site called promoter on the DNA
template strand. In prokaryotes within promoter there are two binding sites TTGACA
polymerases in eukaryotes namely RNA polymerase I, which synthsize rRNA, RNA
transcription bubble moves down the DNA, leaving the growing strand protruding
respectively
series of AT base pairs. The RNA formed in this region forms a GC hairpin (Fig 20.27)
enzymes synthesize RNA from 5’ —» 3’ direction. There is only one type of RN A
One of the subunits of RNA polymerase sigma factor, is responsible for correct initiation
stop synthesis.
In bacteria the newly synthesized mRNA is directly released into the cytoplasm, when it
form of 7 methyl GTP, which is linked 5’ to 5’ with the nucleotide, whereas tail is in
that the molecule may remain stable during long journey to ribosome. The cap is in the
is converted into polypeptide chain. In eukaryotes however, it has to travel long distance
from inside the nucleus to ribosomes outside in the cytoplasm. The eukaryotic mRNA
the form of poly A tail linked to 3’ end of the RNA. These caps and tails save the mRNA
is therefore modified in several ways to aid this journey. A cap and a tail is added so
from variety of nucleases and phosphatases.
About This Channel.....................
I make these videos cause I love to draw and connect the complexity of science and medicine into art. I'm not saying. I'm 100% correct in all my videos, but I do try to obtain the information from credible sources.
One-stop destination for all biology lectures.
_ students in class 11, 12 or appearing for competitive medical exams ( NMDCAT ) will find it very beneficial
_ The videos are categories under various heading to make the students life simplified
Visit My Other Channel Playlist .....................
Class 10th Lectures:
Subscribe My Channel:
Social Link........................
Instagram:
About This Video ........................
In This Video Lecture You Will Learn Basic Concept Of Transcription
This is the process in which an RNA copy of the DNA sequence encoding the gene is
polymerase II, which synthesizes mRNA and RNA polymerase III which synthesizes
The opposite strand is called coding strand or the sense strand. The RNA polymerase
tRNA.
also called -35 sequence and TAT A AT sequence also called -10 sequence, which have
The binding of RNA polymerase to the promoter is the irst step in gene transcription.
ainity for the RNA polymerase. In eukaryotes these sites are at -75 and -25 sites,
of DNA are transcribed. This strand is called template strand or the antisense strand.
from the bubble (Fig 20.25). The stop sequences at the end of the gene terminate the
followed by four or more U ribonucleotides. The hairpin causes RNA polymerase to
and completes the transcription of the gene. The DNA strands open up at the place
synthesis of mRNA. The simplest stop signal is a series of GC base pairs followed by a
polymerase in prokaryote which is responsible for the synthesis of all the three types
and the remaining part of the enzyme (core enzymes) moves over template; strand
produced with the help of an enzyme, RNA polymerase. Only one of the two strands
of RNAs viz. rRNA, mRNA and tRNA. On the other hand there are three types of RNA
of transcription process. Once the transcription has started the sigma factor is released
where enzyme is attached to the templete strand forming transcription bubble. The
Transcription starts at the RNA polymerase binding site called promoter on the DNA
template strand. In prokaryotes within promoter there are two binding sites TTGACA
polymerases in eukaryotes namely RNA polymerase I, which synthsize rRNA, RNA
transcription bubble moves down the DNA, leaving the growing strand protruding
respectively
series of AT base pairs. The RNA formed in this region forms a GC hairpin (Fig 20.27)
enzymes synthesize RNA from 5’ —» 3’ direction. There is only one type of RN A
One of the subunits of RNA polymerase sigma factor, is responsible for correct initiation
stop synthesis.
In bacteria the newly synthesized mRNA is directly released into the cytoplasm, when it
form of 7 methyl GTP, which is linked 5’ to 5’ with the nucleotide, whereas tail is in
that the molecule may remain stable during long journey to ribosome. The cap is in the
is converted into polypeptide chain. In eukaryotes however, it has to travel long distance
from inside the nucleus to ribosomes outside in the cytoplasm. The eukaryotic mRNA
the form of poly A tail linked to 3’ end of the RNA. These caps and tails save the mRNA
is therefore modified in several ways to aid this journey. A cap and a tail is added so
from variety of nucleases and phosphatases.
About This Channel.....................
I make these videos cause I love to draw and connect the complexity of science and medicine into art. I'm not saying. I'm 100% correct in all my videos, but I do try to obtain the information from credible sources.
One-stop destination for all biology lectures.
_ students in class 11, 12 or appearing for competitive medical exams ( NMDCAT ) will find it very beneficial
_ The videos are categories under various heading to make the students life simplified
Visit My Other Channel Playlist .....................
Class 10th Lectures:
Subscribe My Channel:
Social Link........................
Instagram:
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