BIO 150 Unit 4 Question and answers
100% correct ( 4 pgs)
What does a bacterial RNA polymerase produce when it transcribes a protein-
coding gene? - correct answer ✔mRNA
Where is the start codon located? - correct answer ✔at the downstream end
of the 5' untranslated region
Splicing begins: - correct answer ✔as transcription occurs
Compared with mRNAs that have a cap and a tail, predict what will be
observed when a eukaryotic mRNA lacks a cap and a poly(A) tail - correct
answer ✔Translation occurs inefficiently
RNases and proteases are enzymes that destroy RNAs and proteins,
respectively. Which of the following enzymes when added to a spliceosome is
predicted to prevent recognition of pre-mRNA regions critical for splicing? -
correct answer ✔an RNase specific for snRNAs
Some traits are considered vestigial because they existed long ago - correct
answer ✔False
Why does the presence of extinct forms and transitional features in the fossil
record support the pattern component of the theory of evolution by natural
selection? - correct answer ✔It supports the hypothesis that species change
over time
Traits that are derived from a common ancestor, like the bones of human
arms and bird wings, are said to be ___ - correct answer ✔homologous
100% correct ( 4 pgs)
What does a bacterial RNA polymerase produce when it transcribes a protein-
coding gene? - correct answer ✔mRNA
Where is the start codon located? - correct answer ✔at the downstream end
of the 5' untranslated region
Splicing begins: - correct answer ✔as transcription occurs
Compared with mRNAs that have a cap and a tail, predict what will be
observed when a eukaryotic mRNA lacks a cap and a poly(A) tail - correct
answer ✔Translation occurs inefficiently
RNases and proteases are enzymes that destroy RNAs and proteins,
respectively. Which of the following enzymes when added to a spliceosome is
predicted to prevent recognition of pre-mRNA regions critical for splicing? -
correct answer ✔an RNase specific for snRNAs
Some traits are considered vestigial because they existed long ago - correct
answer ✔False
Why does the presence of extinct forms and transitional features in the fossil
record support the pattern component of the theory of evolution by natural
selection? - correct answer ✔It supports the hypothesis that species change
over time
Traits that are derived from a common ancestor, like the bones of human
arms and bird wings, are said to be ___ - correct answer ✔homologous
