Exam 13: Gene Expression

Eukaryotic mRNA has a significantly longer half life than its prokaryotic counterpart.How is this accomplished in eukaryotes? What processes tend to degrade mRNA molecules in both eukaryotes and prokaryotes, and why are these processes needed?

Where is the amino-acid binding site located on the tRNA molecule?

The template DNA strand is described as being parallel to the complementary RNA strand. __________________

Figure 13-1 Use the figure to answer the corresponding question(s). -The conclusion associated with mutant strain III in Figure 13-1 was that it:

Figure 13-3 Use the figure to answer the corresponding question(s). -Which of the following numbered terms represents the correct order of sequences in a prokaryotic mRNA molecule as it was synthesized? 1) 3' trailing sequences 2) Coding sequences 3) Leader sequences 4) Termination signals

Uracil forms a complementary pair with __________ in RNA and __________ in DNA.

All of the following characteristics of tRNA molecules are true except::

Which of the following is a characteristic of uracil?

Substitution of one base pair for another can result in a __________ mutation that results in the conversion of an amino acid specifying codon to a termination codon.

Initiation of transcription requires:

Reverse transcriptase catalyzes the synthesis of DNA from an RNA template. __________________

Which of the following numbered events represents the correct sequence of events of prokaryotic translation initiation? 1) Large ribosomal subunit binds to initiation complex 2) Initiation tRNA binds small ribosomal subunit 3) Initiation complex binds to ribosome recognition sequence on mRNA

Beadle and Tatum began their studies with wild-type Neurospora, which is:

Aminoacyl-tRNA synthetases __________ link __________ to their respective tRNA molecules.

Which of the following is not a reason why Neurospora is an ideal organism to study the effects of genetic mutations?

Explain the process of translation of the genetic code.Include the relevant chemical and cellular structures in your explanation.

Three nucleotides code for one amino acid. __________________

One function of sno-RNAs is processing pre-rRNA molecules in the mitochondrion. __________________

What conclusions did Beadle and Tatum reach with their studies of Neurospora?

A "5' cap":