Of the following, which is the most current description of a gene?
B) a DNA subunit that codes for a single complete protein
C) a DNA sequence that is expressed to form a functional product: either RNA or polypeptide
D) a DNA—RNA sequence combination that results in an enzymatic product
E) a discrete unit of hereditary information that consists of a sequence of amino acids
Answer: C
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?
- In eukaryotic cells, transcription cannot begin until
- 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?
- 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