Exam 17: Gene Expression: From Gene to Protein

What would be the consequence of a mutation in a bacterial cell that produces a defective aminoacyl-tRNA synthetase that attaches a lysine instead of the normal phenylalanine to tRNAs with the anticodon AAA?

Which of the following characteristics is directly related to the coding of a single amino acid during the process of translation?

In eukaryotes, there are several different types of RNA polymerase. Which type is involved in transcription of mRNA for a globin protein?

During the elongation phase of translation, which site in the ribosome represents the location where a codon is being read?

Which of the following statements best describes the termination of transcription in prokaryotes?

Once researchers identified DNA as the molecule responsible for transmitting heritable traits, they asked how information was transferred from the DNA in the nucleus to the site of protein synthesis in the cytoplasm. Which of the following statements correctly describes the mechanism of information transfer in eukaryotes that accomplishes this task?

The figure shows a simple metabolic pathway. -According to Beadle and Tatum's (1930s) hypothesis, how many genes are necessary for this pathway?

The anticodon of a particular tRNA molecule is

The tRNA shown in the figure has its 3′ end projecting beyond its 5′ end. - Which of the following processes will occur at this 3′ end?

The figure represents tRNA that recognises and binds a particular amino acid (in this instance, phenylalanine). - What type of bonding is responsible for maintaining the shape of the tRNA molecule shown in the figure?

Which one of the following statements about RNA processing is correct?

Which of the following processes correctly describes alternative RNA splicing?

In eukaryotic cells, transcription cannot begin until

- What amino acid sequence will be generated, based on the following mRNA codon sequence? 5′-AUG-UCU-UCG-UUA-UCC-UUG-3′

Which of the following processes occurs in prokaryotes but not in eukaryotes?

Accuracy in the translation of mRNA into the primary structure of a polypeptide depends on specificity in the ________.

Which of the following is not true of a codon?

A particular triplet of bases in the template strand of DNA is 5′-AGT-3′. What would be the corresponding codon for the mRNA that is transcribed?

The figure shows a simple metabolic pathway. - If A, B, and C are all required for growth, a strain mutant for the gene encoding enzyme B would be able to grow on medium supplemented with which of the following nutrient(s)?

A part of an mRNA molecule with the following sequence is being read by a ribosome: 5′-CCG-ACG-3′ (mRNA). The following charged transfer RNA molecules (with their anticodons shown in the 3′ to 5′ direction) are available. Two of them can correctly match the mRNA so that a dipeptide can form. tRNA Anticodon Amino Acid GGC Proline CGU Alanine UGC Threonine CCG Glycine ACG Cysteine CGG Alanine - Which of the following anticodons in the first tRNA to bind will complement this mRNA?