G4; PROTEIN SYNTHESIS Flashcards
-made up of smaller components
known as amino acids
-most abundant biomolecule in
the body
PROTEINS
Chemical Formula of Proteins
- CARBON
- HYDROGEN
-OXYGEN - NITROGEN
Functions of Proteins
Synthesis of Enzymes,
Blood Components,
Hormones
Maintenance
Repair of Existing Tissues
Production of New Tissues
is the process in which cells
make proteins. It occurs in two stages:
transcription and translation. These two processes
are summed up by the central dogma of
molecular biology: DNA → RNA → Protein.
Protein synthesis
is the process in which cells
make proteins. It occurs in two stages:
transcription and translation. These two processes
are summed up by the central dogma of
molecular biology: DNA → RNA → Protein.
Protein synthesis
is the basic building blocks of nucleic
acids (DNA and RNA)
Nucleotide
is an enzyme that copies DNA
sequence into an RNA sequence during the process of
transcription.
RNA Polymerase
- Double-stranded
- Contains Thymine
- Eukaryotic DNA never
leaves the nucleus
DNA
- Single-stranded
- Contains Uracil
- RNA molecules can travel
out of the nucleus
RNA
It is the transfer of genetic
instructions in DNA to mRNA in
the nucleus. It includes three
steps: initiation, elongation, and
termination. After the mRNA is
processed, it carries the
instructions to a ribosome in the
cytoplasm.
transcription
RNA polymerase binds to a promoter sequence
near the beginning of a gene
- The two strands of DNA ahead of the RNA
polymerase unzips, exposing their bases
initiation
The RNA polymerase moves
along the DNA strand and reads
the bases to make an mRNA
strand. As the RNA polymerase
moves forward, the two strands
of DNA behind it rezips
Elongation
The RNA polymerase molecule and mRNA
detaches from the DNA template strand
Termination
It is the second part of the
central dogma of molecular
biology: RNA → Protein. It is the
process in which the genetic
code in mRNA are read and
moves to a ribosome, which
consists of rRNA and proteins.
After that, tRNA then brings the
correct sequence of amino acids
to the ribosome, thereby
producing a polypeptide chain
or proteins.
TRANSLATION
It transports the genetic
information from the DNA in the
nucleus to the ribosomes in the
cytoplasm.
Messenger RNA (mRNA)