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الفصل 11

ادوار او وظائف اضافية للحمض النووى الرييوزى

إضعاف النسخ فى بدائيات النوى
Transcriptional attenuation occurs when RNA transcription is prematurely terminated due to the formation of a terminator mRNA hairpin…
المحول الريبوزى
Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins.…
تعديل الحمض النووى الريبوزى
RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or…
نقل منظم للحمض النووى الريبوزى
In eukaryotes, transcription and translation are compartmentalized; an mRNA is first synthesized in the nucleus and then selectively transported to…
مسح التسرب
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start…
ثبات الحمض النووى الريبوزى و التعبير الجينى
The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes,…
تدخل الحمض النووي الريبي RNA
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the expression of a gene by binding to its messenger RNA (mRNA)…
RNA المكيروية
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of…
الاحماض النووية الريبوزية المتداخلة الصغيرة
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional…
RNA المتفاعل مع Piwi - بى اى ار ان ايه
PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs…
كرسبر و سي ار ار ان ايه
Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to…
الحمض النووى الريبوزى الطويل الغير مشفر
In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces…
الريبوزومات
The term ribozyme is used for RNA that can act as an enzyme. Ribozymes are mainly found in selected viruses, bacteria, plant organelles, and lower…
الظروف على الأرض في بداياتها المبكرة
Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and…
دمج المطلق والنسبي البيانات الكمية PCR لتحديد STAT3 لصق النصوص البديل
Human signal transducer and activator of transcription 3 (STAT3) is one of many genes containing a tandem splicing site. Alternative donor splice…
تدخل الحمض النووي الريبي في الخنافس المائية كأداة قوية للتلاعب التعبير الجيني في نقاط زمنية تنموية محددة
RNA interference (RNAi) remains a powerful technique that allows for the targeted reduction of gene expression through mRNA degradation. This…

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