Chapter 12 Quiz

The transcription process in a eukaryotic gene directly produces

Pre-mRNA

What molecule indirectly provides the energy for translation?

ATP

What is the function of the poly A tail?

The poly A tail increases mRNA stability in eukaryotes

Wild type bread mold can grow in a minimal medium without supplements, while certain mutated strains can only grow in a minimal medium that is supplemented with specific intermediates. See the figure below for an overview of the arginine biosynthetic pathway.A strain that can grow in a minimal medium containing arginine, but NOT in minimal media containing citrulline nor in minimal media containing ornithine would have a mutation in the gene that encodes for _____.

Enzyme 3

An organized unit of DNA sequences that enables a segment of DNA to be transcribed into RNA and ultimately results in the formation of a functional product is called a _______.

Gene

The following mRNA transcript would result in which polypeptide sequence?5′-ACU UUC ACU AUG UUU UUA UCC UCC ACU CCU UGA-3′ Use the following codons and the amino acids they encode.AUG = Start or Met; UUU, UUC = Phe; UUA, UUG = Leu; UCU, UCC = Ser; CCU, CCC = Pro; ACU, ACC = Thr; UGA = Stop.

Met-Phe-Leu-Ser-Ser-Thr-Pro

Translation occurs in the ________ of bacteria and in the _______ of eukaryotic cells.

Nucleus; cytoplasm

How many nucleotides are contained in a single codon?

Three

The process that produces mRNA from DNA is called

Transcription

Which of the following serves as the "translator" or intermediary between an mRNA codon and an amino acid?

tRNA