Biology Questions and Answers
- If a tRNA anticodon is CAA
what is its corresponding
mRNA codon? For the genetic
code which amino acid does
this codon codify?
Accordincorresponding codon to the g to the A-U , C-G rule, theCAA
anticodon is GUU.
The genetic corelated to codons and not to anticodode table for translation isns. (^)
The amino acid according to the genetic codcodified by GUU,e, is valine.
- If a fragment of nucleic
acid has a nucleotide
sequence TAC can one assert
that it is a codon or an
anticodon?
A nucleic acid having a TAC sequence
surely is not tRNA,does not present the nitrogen- it is DNA since RNA
containing bRNA it cannot be a codon or anase thymine. Since it is not
anticodon.
- Why can the genetic code
be qualified as a “degenerate
code”?
The genetic cobecause there are amino de is a degenerate codeacids codified (^)
by more than one type of codon. It isnot a system in which each element is (^)
codified by only one codifying unit.
For example, the amino acid arginine is
codified by six codons: CGU, CGC, CGG, AGA and AGG. CGA,
- What is the concept of
universality of the genetic
code? What are the exceptions
to this universality?
The genetic cothe rules of protein code is universal bdification basecauseed
on mRNA codons are practically the
same for all known living example, the genetic code is the samebeings. For (^)
for humans, for bacteria and for
invertebrates.
The protein synthesis in mitochondria,
chloroplastshowever are accomplishe and some protozoad by differentns (^)
genetic codification.
- How does the universality
of the genetic code make the
recombinant DNA technology
possible?
The universalityrefers to the fact that all living b of the genetic coeingsde (^)
have their protein functioning accordisynthesisng to the same machin ery
principles of storage, transmission and
recognition oftranslation of mRNA information, inclu codons. This factding (^)
makes possible the exchanging of genes
or gene fragments between differentorganisms and secures that these genes (^)
continue to command protein synthesis.
This universality, for example, makes
feasible the insertion of a fragment of
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