AP Biology Genes and Proteins — practice questions
18 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice AP Biology Genes and Proteins in the app →Each amino acid is defined by a nucleotide sequence how many bases long?Nucleotide triplets that specify amino acids are called:Codons that terminate protein synthesis are called nonsense codons or:Which codon specifies methionine and also serves to initiate translation?How many of the 64 codons terminate protein synthesis?The DNA sequence onto which RNA polymerase binds to begin transcription is the:The genetic code is described as degenerate, meaning one amino acid can be encoded by:Transcription requires the DNA double helix in the region of messenger RNA synthesis to:RNA is synthesised in which direction, and by which enzyme?The DNA strand from which transcription always proceeds for a given gene is the:The nucleotide pair corresponding to the first messenger RNA nucleotide transcribed is called the:Transfer RNA folds so that the amino acid binding site sits at one end and at the other end sits the:The transcription elongation phase in prokaryotes begins with the release from the polymerase of the:Inserting one or two nucleotides changes the triplet reading frame, altering the message for:The universality of the genetic code is described as powerful evidence that life on Earth shares:Sixty-four codons encode about twenty amino acids, which requires the code to be:At the start of the elongation phase of translation, the initiating methionyl transfer RNA occupies the:Once a prokaryotic gene is transcribed, termination signals instruct the polymerase to: