protien synthesis & cell structure
which molecule carries genetic info from the nucleus to the ribosomes?
mRNA
during trancription what enzyme is responsible for creating mRNA?
RNA polymerase or DNA polymerase
what is the function of tRNA in protien synthesis?
carries amino acids to ribs
the process of translation occurs in which cellular structure?
. ribosomes
what is the first step of transcription?
DNA unwinding
which component makes up a large subunit of ribsomes?
rRNA and protiens
what is the name for a sequence of 3 nucleotides in mRNA
codon
during translation what forms between AA?
peptide bonds
what marks the end of translation
stop codon
the genetic code is described as
universal
which molecule brings AA to start PS?
tRNA
what happens during elongation phase of translation?
amino acids join together
the process of transcription produces
protiens
what structure holds tRNA in place for translation
a site of ribosomes
give 3 reasons RNA is different from DNA
1. single strand 2. different sugers 3. uracil instead of thymine
what is the role is rRNA
protien synthesis catalist, makes ribosomes
the direction of transcription is...
one direction
what would happen during modification of the newly formed protien?
protien folding
is genetic code discontinuous?
false! it is continous
turn CCU into mRNA then show the AA
GGA and into Gly
which organelle is responsible for PS in eukaryotic cells?
ribosomes
the nuclear envelope is composed of...
2 membrane layors
which organelle is the powerhouse of the cell
mitocondria
what does the golgi body do
protien and lipid modification and packaging
what helps maintain structural support in the cell
plasma membrane
the nucleolus is responsible for
rRNA synthesis
what transport uses NO energy to expel things from the cell
facilitated diffusion: channel protiens ect
what organelle detoxifyes?
lysososmes
what does rough endoplasmic recticulum have that smooth does not?
ribosomes attached
what do lysososmes contain?
digestive enzymes
what is a helicase
enzymes that bind and may even remodel nucleic acid or nucleic acid protein complexes
what is a DNA helicase
DNA helicases are essential during DNA replication because they separate double-stranded DNA into single strands allowing each strand to be copied.
what is RNA polymerase
RNA polymerase is an enzyme that copies DNA sequences into RNA sequences during transcription, it unwinds
what is DN polymerase?
an enzyme used in dna replication
vestilces can contain...
protiens
cytoskeleton is made of
micro tubes, filaments
smouth ER specialozes in
lipid synthesis