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DNA, RNA and proteins
Transcript of DNA, RNA and proteins
What is the 'transforming principle'?
If the old DNA strand contains the following sequence:
How would the new DNA strand be?
They are nucleic acids.
They are made of nucleotides.
The have sugar-phosphate backbones.
They are found in the nucleus.
DNA and RNA
DNA is double-stranded while RNA is single-stranded.
DNA has T while RNA has U.
RNA is also found in the cytoplasm as well as the nucleus while DNA is not.
Composed of subunits called amino acids.
The sequence of amino acids determines the shape of the protein.
They are synthesized at the ribosomes.
Proteins are important for diverse functions in the body including hormones, enzymes, and transport.
They can denature (by heat, changes in pH, etc), causing a loss of function.
How do we get proteins from genes?
We need a code
Bases act as a code for amino acids used in translation.
Every 3 bases of the mRNA is called a codon; a typical codon specifies a particular amino acid in translation.
The genetic code