2019 p2 Flashcards
(10 cards)
explain why long-sighted person has difficulty seeing near objects clearly
because light focuses behind the retina
-as lens cannot thicken enough
what lens can be used in spectacles to treat myopia
concave lenses
2 steps of protein synthesis
transcription and translation
what is transcription
take a single gene of dna and copy into a structure called mrna
what is translation
take mrna strand and change into protein
differences between mRNA and DNA
mRNA is:
-shorter than dna
-only a single strand
-contains base uracil instead of thyamine
what creates mRNA bases
rna polymerase
what are mrna to dna
complimentary
whats the dna which mrna move along called
the temporary strand
describe steps of how amino acid sequence is assembled used dna base sequence of gene
-strand of mRNA is transcribed from gene in nucleus
-mRNA leaves nuckeus
-mRNA binds to ribosome
-triplet code from mRNA is matched by a complementary tRNA anticodon at ribosome
-tRna transfers amino acids to polypeptide chain in specific order
