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CONDON

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Q: What are three nucleotides that specify a single amino acid to be added to a polypeptide?
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What is the smallest number of nucleotides that must be added or subtracted to alter the reading frame?

The smallest number of nucleotides that must be added or subtracted to alter the reading frame is 1. A single nucleotide insertion or deletion can cause a frameshift mutation, resulting in a different reading frame for translation.


When is the new Amino acid added to the polypeptide chain?

in the ribosome :)


What end of a growing strand are DNA nucleotides added to?

5' end (nucleotides are added from 3' toward 5')


What is condons?

Condon has 3 bases sequences which three consecutive nucleotide specify a single amino acid that is to be added to the polypptide.


What is DNA condon?

Condon has 3 bases sequences which three consecutive nucleotide specify a single amino acid that is to be added to the polypptide.


How does insertion or deletion affect a polypeptide chain?

Nucleotides in the coding region of DNA are transcribed into mRNA. mRNA, in turn, is translated into a polypeptide via the ribosome. Three (3) nucleotides correspond to one amino acid. In other words, if the nucleotides in question are AAA, those nucleotides will be transcribed into their mRNA complement, UUU, which in turn will be translated into the amino acid phenylalanine via the ribosome. Now, if you remove one of those nucleotides, say the first A of the AAA, everything gets screwed up. You get what is caused a frameshift. Say originally you had AAAUAG. As I mentioned, AAA would eventually become phenylalanine, and UAG is a stop codon, which would tell the ribosome to stop translating: the polypeptide is complete. But if the first A of the AAA is removed -- the ribosome still wants to read in threes! So it will read AAU, and code asparagine instead of phenylalanine, and moreover . .. it will keep translating making a polypeptide much longer than evolution intended!


The step of translation in which amino acids are added one at a time to the growing polypeptide is?

elongation


How many monomers are added to the growing polypeptide or protein chain in each step?

four


What is added to the polypeptide strand?

Amino Acids from the tRNA strand during the translation process.


What is added to 3' end of the rna?

a long string of adenine nucleotides


What is added to each side of the ladder after a DNA molecule splits?

complementary nucleotides


What is added to each side of the DNA ladder After the molecule splits?

complementary nucleotides