What name is given to the process in which a strand of DNA is used as a template for the manufacture of a strand of pre-mRNA?
What name is given to the process in which the information encoded in a strand of mRNA is used to construct a protein?
What is the process called that converts the genetic information stored in DNA to an RNA copy?
Transcription begins at a promoter. What is a promoter?
A site in DNA that recruits the RNA Polymerase
Which of the following statements best describes the promoter of a protein-coding gene?
The promoter is a nontranscribed region of a gene.
What determines which base is to be added to an RNA strand during transcription?
Base pairing between the DNA template strand and the RNA nucleotides
Which of the following terms best describes the relationship between the newly synthesized RNA molecule and the DNA template strand?
What happens to RNA polymerase II after it has completed transcription of a gene?
It is free to bind to another promoter and begin transcription.
Which of the following initially determines which DNA strand is the template strand, and therefore in which direction RNA polymerase II moves along the DNA?
the specific sequence of bases along the DNA strands
During RNA processing a(n) _____ is added to the 3' end of the RNA.
a long string of adenine nucleotides
part of the ribosome, which is the site of protein synthesis; is the most abundant form of RNA; is a component of ribosomes
carries the genetic information from the DNA; the information specifies the sequence of amino acids in the new protein; contains exons
interprets the information from the mRNA and brings the appropriate amino acids to the ribosome; contains an anticodon
the information carried in the mRNA is transferred to molecules of tRNA to build a protein on the ribosomes.
Which of the following processes is an example of a post-translational modification?
Which of the following steps occurs last in the initiation phase of translation?
The large ribosomal subunit joins the complex.
The average length of a transcription unit along a eukaryotic DNA molecule is about 27,000 nucleotide pairs, whereas an averaged-sized protein is about 400 amino acids long. What is the best explanation for this fact?
Most eukaryotic genes and their RNA transcripts have long noncoding stretches of nucleotides that are not translated.
Which of the following is not true of RNA processing?
Exons are cut out before mRNA leaves the nucleus.
Which of the following mutations would be most likely to have a harmful effect on an organism?
a single nucleotide insertion downstream of, and close to, the start of the coding sequence
Which of the following statements about ribozymes is/are correct?
A ribosome can be regarded as one large ribozyme. In some genes, intron RNA functions as a ribozyme and catalyzes its own excision. Ribozymes are RNA molecules that function as enzymes.
Which of the following molecules is/are produced by translation? Include molecules that are subject to further modification after initial synthesis.
RNA polymerase and Aminoacyl-tRNA synthetase
Which of the following mutations would likely be most dangerous to a cell?
Deletion of one nucleotide