BIO 111 PURDUE EXAM 2 TEST QUESTIONS WITH ACCURATE SOLUTIONS
When was the genetic map founded?
1913
What is transcription?
preserves information in DNA into temproary copy of RNA
What roles does RNA have in gene expression?
Template (mRNA), Adapter (tRNA), Ribosome (rRNA)
What is Translation or Protein synthesis?
converts information: nucleic acid to protein
What is messenger RNA (mRNA)?
copy of gene, used to direct protein synthesis
What is ribosomal RNA (rRNA)?
part of ribosome, multiple forms, in each subunit
What is transfer RNA (tRNA)?
,adapter molecule, interacts with amino acids & nucleic acids
What is small nuclear RNA (snRNA)?
necessary for splicing process in eukaryotes
What is micro RNA (miRNA)?
very small RNA's that interact with mRNA to 'silence' message by preventing translation
What enzyme is need to do the copying in transcription?
RNA Polymerase
Where does gene expression occur in Prokaryotes?
cyptoplasm
What are the three phases of Transcription?
initiation, elongation, termination
What is initiation in transcription?
Promoter: recognize
, What is elongation in transcription?
similar to DNA synthesis except only one strand is copied and strands are not completely
unwound; form transcription bubble where polymerase is transcribing
What is termination in transcription?
Terminator: recognized by core enzyme and may require accessory proteins
What is RNA polymerase?
large multisubunit enzyme
What does the sigma factor do?
recognizes promoter in DNA and disrupts hydrogen bonds of helix
Where does elongation occur?
in the transcription bubble
What are operons?
Transcript from multiple genes in prokaryotic mRNA
When was the genetic map founded?
1913
What is transcription?
preserves information in DNA into temproary copy of RNA
What roles does RNA have in gene expression?
Template (mRNA), Adapter (tRNA), Ribosome (rRNA)
What is Translation or Protein synthesis?
converts information: nucleic acid to protein
What is messenger RNA (mRNA)?
copy of gene, used to direct protein synthesis
What is ribosomal RNA (rRNA)?
part of ribosome, multiple forms, in each subunit
What is transfer RNA (tRNA)?
,adapter molecule, interacts with amino acids & nucleic acids
What is small nuclear RNA (snRNA)?
necessary for splicing process in eukaryotes
What is micro RNA (miRNA)?
very small RNA's that interact with mRNA to 'silence' message by preventing translation
What enzyme is need to do the copying in transcription?
RNA Polymerase
Where does gene expression occur in Prokaryotes?
cyptoplasm
What are the three phases of Transcription?
initiation, elongation, termination
What is initiation in transcription?
Promoter: recognize
, What is elongation in transcription?
similar to DNA synthesis except only one strand is copied and strands are not completely
unwound; form transcription bubble where polymerase is transcribing
What is termination in transcription?
Terminator: recognized by core enzyme and may require accessory proteins
What is RNA polymerase?
large multisubunit enzyme
What does the sigma factor do?
recognizes promoter in DNA and disrupts hydrogen bonds of helix
Where does elongation occur?
in the transcription bubble
What are operons?
Transcript from multiple genes in prokaryotic mRNA
