Central Dogma Of Life Flashcards
What is central dogma of life?
The flow of biological information from DNA to RNA and from RNA to protein is known as central dogma of life
What is the first step of gene expression?
Transcription
When does a cell need to undergo transcription?
When a new protein is needed by the cell
What happens to the DNA during transcription?
The two strands of DNA unwind from each other
What is synthesized during transcription?
A single strand of messenger RNA (mRNA)
How are mRNA nucleotides paired during transcription?
By pairing complementary mRNA nucleotides with the exposed DNA (non-coding) strand
Which nucleotides are found in mRNA?
Adenine, cytosine, guanine, and uracil
What happens to the DNA strands after mRNA is synthesized?
Both strands of DNA are “zipped” back together into their normal shape
What is uracil paired with in mRNA?
Adenine
How does uracil differ from thymine in
mRNA?
Uracil is paired with adenine instead of thymine
What is the process of transcription in gene expression?
-When a cell needs protein two DNA strands of gene that codes for protein unwind from each other
-The messenger RNA is synthesized by the pairing of complimentary messenger, RNA nucleotides and exposed DNA strand
-The DNA strands are zipped back together to its normal shape
What is the second step of gene expression?
Translation
Where does the mRNA synthesized in : the nucleus move to during translation?
It moves into the cytoplasm
What does mRNA bind to in the cytoplasm?
It binds to the ribosome
How are mRNA codes translated during translation?
They are translated by ribosomes with the help of tRNAs of opposite anticodon
