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The prevailing idea among molecular biologists is that RNA came first, in an "RNA world".
There are several arguments used to support this idea. One is that DNA needs RNA in order to replicate, but RNA can replicate itself. Also RNA has catalytic properties; DNA does not. The first nucleic acid must have been able to replicate itself and to catalyze the process.
Another line of evidence involves the way that most cells synthesize the components of the two nucleic acids. The nucleotides of RNA (ribonucleotides) are assembled from simpler molecules, but those of DNA are produced by modification of ribonucleotides (the sugar of the ribonucleotide, ribose, is reduced to form deoxyribose, and if the base in the nucleotide is uracil it is methylated to form thymine).
Wiki User
∙ 15y ago
Wiki User
∙ 15y agoDNA comes first it actually makes RNA and then makes proteins
Wiki User
∙ 9y agoRNA can act as its own polymerase so no proteins are required. RNA can be catalytic and can self replicate.
Wiki User
∙ 14y agoThey weren't invented they have always been here, they were just discovered by Watson and Crick
Wiki User
∙ 11y agoaccording to me rna came first because virus is the first life in world and it's amino acid is mainly RNA
Wiki User
∙ 8y agoThat is RNA
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When the information from DNA is passed to RNA this process?
The process is called transcription. RNA polymerase enzyme will synthesize RNA (mRNA) from DNA sequences and this is the first step in gene expression.
What enzyme transcribes DNA?
The enzyme that transcribes the DNA into RNA is called RNA polymerase.
A major difference in RNA as compared to DNA is?
RNA can move and DNA cant. DNA has a double helix strand and RNA is a single strand.
What is the name of the DNA molecule that is transcribed?
DNA transcription is a process that involves the transcribing of genetic information from DNA to RNA.
Are nucleotides pieces that form the dna molecule?
DNA is composed of nucleotides. DNA is essentially a polymer made up of nucleotide monomers
How could all three of them have come into existence at the same time since RNA DNA and proteins all need each other for life to continue?
RNA doesn't need proteins nor does it need DNA. RNA probably came first. And it is known that RNA can form peptide bonds which can make proteins. DNA would have come later. They don't need each other, from an evolutionary standpoint. Modern DNA and RNA and proteins are interlocked, but earlier forms clearly weren't.
What are two types of nucleic acid found the cell?
Deoxy-ribonucleic acid (DNA) and ribonucleic acid (RNA)
What distinguishes RNA from DNA?
First of all, RNA has ribose, which is what the R stands for. DNA had deoxyribose, which is what the D stands for. Also, RNA is a single strand, while DNA id double- stranded and has a double helix shape. Thirdly, DNA has Thymine, while RNA has Uracil.
What is the name of the nucleotides have no DNA and no RNA?
Nucleotides do not have DNA or RNA. DNA and RNA are composed of nucleotides.
Where is DNA changes to RNA?
DNA changes to RNA when the nucleus is going through protein synthesis. in order for your ribosomes to make protein they must copy a portion of your DNA, change it into RNA then translate the RNA into amino acid sequences which come all together to make a protein ...
When the information from DNA is passed to RNA this process?
The process is called transcription. RNA polymerase enzyme will synthesize RNA (mRNA) from DNA sequences and this is the first step in gene expression.
What enzyme transcribes DNA?
The enzyme that transcribes the DNA into RNA is called RNA polymerase.
What is the region of DNA where RNA synthesis begins called?
The region of DNA where RNA synthesis begins is the promoter. DNA contains a number of upstream regulatory and promoter sequences but the region of DNA where RNA synthesis begins is the start codon. This is the first codon that translates into an RNA nucleotide.
A major difference in RNA as compared to DNA is?
RNA can move and DNA cant. DNA has a double helix strand and RNA is a single strand.
What is the name of the DNA molecule that is transcribed?
DNA transcription is a process that involves the transcribing of genetic information from DNA to RNA.
What is the substance in RNA but not DNA?
An uracil base is in RNA but not in DNA
What does the synthesis of a new strand of DNA begin?
Following the initiation of DNA replication, the first step is the synthesis of a short RNA primer.
