BREAK DOWN OF VOCAB - Transcription Flashcards
What is the coding strand of DNA
Exactly what the mRNA will COPY (except it CONTAINS THYMINE rather than uracil)
Function of DNA coding strand
increases durability of DNA strand, reduces risk being damaged, acts as template for REPAIRING enzymes.
How does coding strand help repairing template strand
If base was removed from template strand and in the OPPOSITE LOCATION on the coding strand there is a adenine base, ENZYMES repair the template strand by inserting thymine (following complementary base pairing rule)
How does coding strand help repairing template strand
If base was removed from template strand and in the OPPOSITE LOCATION on the coding strand there is a adenine base, ENZYMES repair the template strand by inserting thymine (following complementary base pairing rule)
What does coding strand ensure on the template strand
Ensures the code on template strand is present, thus amino acid and final proteins are correct
What is a template strand
Used during transcription to produce mRNA
Function of template strand
Provide the template (CORRECT amino acids in protein) for enzymes to read off
What happens to DNA strand during transcription to complete strand of mRNA
Double strand unwound, coding and template strand separates at promoter region. Enzymes comes and add bases complimentary toDNA template strand until terminating region reached.
What happens to completed strand of (mRNA)
Single strand is small enough to move through nucleus pore, reaches ribosomes
Function of mRNA
Make sure (correct code/instructions) for polypeptide chain, and therefore protein, reaches ribosome FOR TRANSLATION to occur
How is accurate transcription ensured
Base pairing rule
What does the size bases determine
Size of bases determine which bases bind together
What does a large double ring/purine do
Compliments only the small SINGLE ring/purine
A is large so it binds with…
T because it is small
Adenine and Guanine is too large so…
Can’t fit in DNA OR RNA
