Biology Questions and Answers
- Concerning their biological
function what is the difference
between DNA and RNA?
DNA is thRNA production e source of information f(transcription) and thusor (^)
for protein basis of heredity due to its replicationsynthesis. DNA is still the (^)
capability.
The messenprotein synthesis (translation). Iger RNA is the template fon this r
process tRNAsince the first carries amino acids f and rRNA also participateor
the polypeptide chain second is a structural constituent offormation and the
ribosomes (the organelles where
proteins are made).
- Is there any situation in
which DNA is made based on a
RNA template? What is the
enzyme involved?
The process in which DNA is synthesized
having as template a reverse transcription. IRNA chain n cells infectedis called
by retroviruses (RNA viruses, like the
AIDS or transcription SARS viruses) reverseoccurs and DNA is (^) made
from information contained in the viral
RNA.
Viral RNA within the host cell produces
DNA with reverse transcriptase.the help of an enzyme called Based on that
DNA the host cell then makes viral
proteins, nand viral replication occurs.ew viruses are assembled
- Do the phosphate and the
pentose groups give
homogeneity or heterogeneity
to the nucleic acid chains?
What about the nitrogen-
containing groups? Supported
by that, which of those groups
is expected to directly
participate in the highly
diverse and heterogeneous
genetic coding, i.e., which of
those groups is the basis of
the information for protein
production?
The phosphatare the same ie and the pentose groupsn every nucleotide that
forms the homogeneity to the molecule. Tnucleic acid and so thheey give
nitrogen-containing bases however can
vary amguanine (in DNA) aong adenine, thyminnd uracil (in RNA).e, cytosine,
These variations provide the
heterogeneity of the nucleic acidmolecule.
Homogeneous portions of a moleculseldom would store any information, bye (^)
the same reason that a sequence of the
same letter omake many wf the alphabet cannotords with different
meanings. The nitrogen-containing
bases, on the other hand, because theyare different (four different types for
RNA or DNA), can make different
sequences athe diversity of the genetic code.nd combinations that allow
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