3What is transcription What is needed for it to occur What a

3.What is transcription? What is needed for it to occur? What are the 2 major parts of a gene?

8. For translation to occur you need 3 RNAs. What are they and what do they do?

10. How can you know the sequence of a protein from a DNA sequence? What would you do to figure out where the genes were if you know exactly where the promoter sequences were throughout the genome?

Solution

3 Transcription is production of mRNA (messenger RNA ) from DNA template.

Two major parts of gene are coding part ( exon) non coding part ( intron) ... in terms of mRNA the parts are coding sequence and 3\'untranslated regions like poly a tail

8 For translation we need mRNA which acts as template to study and build protien sequence ,tRNA transfer RNA brings amino acids to ribosome during protien synthesis for incorporation into polypeptide chain .....rRNA ribosomal RNA helps in catalysing peptide bonds inside ribosomes .... it is a catalytic RNA

10. How can you know the sequence of a protein from a DNA sequence

every 3 leters in DNA code for one codon in transcribed mRNA .... and each codon in turn codes for a different aminoacid in process of translation except stop codons .... smtimes many codons code for one amino acid in a process called codon degeneracy

What would you do to figure out where the genes were if you know exactly where the promoter sequences were throughout the genome?

if we know where the promoters are . The following ATG codon will be a begigning of open reading frame and gene will start transcribing from that place ..... assuming alternative start site selection doesnt occur ,,,,,,

Hope it answers your question in case u need further clarification or help feel free to ask in comments i will be glad to reply ...Regards