5 Written questions
5 Matching questions
- RNA polymerase
- signal-recognition particle (SRP)
- a 1) A deficiency in a chromosome resulting from the loss of a fragment through breakage. (2) A mutational loss of one or more nucleotide pairs from a gene.
- b An enzyme that links together the growing chain of ribonucleotides during transcription.
- c The synthesis of RNA on a DNA template.
- d A complex assembly that interacts with the ends of an RNA intron in splicing RNA, releasing the intron and joining the two adjacent exons.
- e A protein-RNA complex that recognizes a signal peptide as it emerges from the ribosome.
5 Multiple choice questions
- The modified end of the 3' end of an mRNA molecule consisting of the addition of some 50 to 250 adenine nucleotides.
- The most common type of mutation, a base-pair substitution in which the new codon makes sense in that it still codes for an amino acid.
- A promoter DNA sequence crucial in forming the transcription initiation complex.
- The removal of noncoding portions (introns) of the RNA molecule after initial synthesis.
- A mutation occurring when the number of nucleotides inserted or deleted is not a multiple of three, resulting in the improper grouping of the following nucleotides into codons.
5 True/False questions
base-pair substitution → A type of point mutation; the replacement of one nucleotide and its partner in the complementary DNA strand by another pair of nucleotides.
poly- → many
exo- → out, outside, without
5' cap → The end of a pre-mRNA molecule modified by the addition of a cap
ribosome → An enzymatic RNA molecule that catalyzes reactions during RNA splicing.