Question

can anyone tell me what RNA is and what it does?

Answer 1

Ribonucleic acid, a nucleic acid present in all living cells. Its principal role is to act as a messenger carrying instructions from DNA for controlling the synthesis of proteins

Answer 2

Ribonucleic acid, or RNA, is a molecule composed of carbon, oxygen, hydrogen, nitrogen, and phosphate that is used as a chemical data storage molecule similar to DNA. There are three types of RNA: mRNA, tRNA, and rRNA. mRNA, or messenger RNA, is transcribed from DNA and is the RNA used for protein translation. tRNA is used in the process of translation to read the mRNA and add amino acids to a polypeptide. rRNA is one of the components of a ribosome, the enzyme that conducts translation.

Answer 3

thanks y'all, that helped alot

Answer 4

no problem

Answer 5

* RNA properties:
o RNA = nucleotide bases + 5 carbon sugar (ribose instead of deoxyribose) + phosphate
o RNA has 4 types of nucleotide bases: A, C, G, U (U replaces T)
o RNA is usually a single strand, not a helix
* The 3 types of RNA:
Messenger RNA m-RNA An RNA copy of a gene
Ribosomal RNA r-RNA Ribosomal structure; also includes the enzyme peptidyl transferase (makes peptide bonds)
Transfer RNA t-RNA Transfer amino acids to ribosome; have anticodons which match the m-RNA codons. At least 20 types required- one for each amino acid.
o The transcribed code is carried from the nucleus to the ribosomes by messenger RNA (m-RNA)
o The ribosomes contain ribosomal RNA (r-RNA). This type is structural and also acts as an enzyme when the protein is lengthened
o Transfer RNA (t-RNA) carries amino acids to the ribosomes: there must be at least 20 types of t-RNA
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