In eukaryotic cells, transcription cannot begin until
A) the two DNA strands have completely separated and exposed the promoter.
B) several transcription factors have bound to the promoter.
C) the 5' caps are removed from the mRNA.
D) the DNA introns are removed from the template.
E) DNA nucleases have isolated the transcription unit.
Answer: B
From Gene to Protein
- A transfer RNA (#1) attached to the amino acid lysine enters the ribosome. The lysine binds to the growing polypeptide on the other tRNA (#2) in the ribosome already.
- The enzyme polynucleotide phosphorylase randomly assembles nucleotides into a polynucleotide polymer.
- Which of the following mutations would be most likely to have a harmful effect on an organism?
- Which component is not directly involved in translation?
- Which of the following is not true of RNA processing?
- The anticodon of a particular tRNA molecule is
- Which of the following is not true of a codon?
- A peptide has the sequence NH2-phe-pro-lys-gly-phe-pro-COOH. Which of the following sequences in the coding strand of the DNA could code for this peptide?
- What amino acid sequence will be generated, based on the following mRNA codon sequence? 5' AUG-UCU-UCG-UUA-UCC-UUG 3'
- A possible sequence of nucleotides in the template strand of DNA that would code for the polypeptide sequence phe-leu-ile-val would be
- If A, B, and C are all required for growth, a strain mutant for the gene-encoding enzyme B would be capable of growing on which of the following media?
- If A, B, and C are all required for growth, a strain that is mutant for the gene-encoding enzyme A would be able to grow on which of the following media?
- A mutation results in a defective enzyme A. Which of the following would be a consequence of that mutation?
- According to Beadle and Tatum's hypothesis, how many genes are necessary for this pathway?
- When the genome of a particular species is said to include 20,000 protein-coding regions, what does this imply?
- In order for a eukaryotic gene to be engineered into a bacterial colony to be expressed, what must be included in addition to the coding exons of the gene?
- In comparing DNA replication with RNA transcription in the same cell, which of the following is true only of replication?
- Which of the following is true of transcription in domain Archaea?
- Gene expression in the domain Archaea in part resembles that of bacteria and in part that of the domain Eukarya. In which way is it most like the domain Eukarya?
- Of the following, which is the most current description of a gene?
- Which of the following statements is true about protein synthesis in prokaryotes?
- If a protein is coded for by a single gene and this protein has six clearly defined domains, which number of exons below is the gene likely to have?
- Which of the following mutations is most likely to cause a phenotypic change?
- The most commonly occurring mutation in people with cystic fibrosis is a deletion of a single codon. This results in