Question

1. All of the following with respect to transcription in prokaryotes(bacteria) are true EXCEPT: a) Most genes have a consensus sequence located at the -10 position b) Most genes have a consensus sequence located at the -35 position c) RNA Polymerase binds genes at the first intron sequence d) Translation of an mRNA can start while transcription is still in progress

2. Creighton and McClintock with Zea mays(corn) and Curt Stern with Drosophila both developed experiments that provided experiment backing to Morgan’s hypothesis of gene linkage on a chromosome. The key aspect of their experiments was: a) They each looked at three traits on a single chromosome to prove gene linkage b) They used chromosome with cytological markers (visible in a karyotype) at both ends c) They used two traits one to each side of the centromere to show linkage d) They used two traits one close to each ends of the chromosome to show linkage

3. For genetic testing of a developing embryo, of the following procedures identify the one that is less likely to cause health issues in the individuals being tested? a) Amniocentesis b) Isolating and analyzing DNA/RNA from the mother’s blood c) Chorionic villus sampling d) None of the procedures present a significant health risk

Answer 1

1) in prokaryotic mRNA consensus sequences are found in the -35 and -10 regions and transcription occurs in the cytosol so transcription and translation can occur simultaneously, prokaryotes do not have introns so the answer is ) RNA Polymerase binds genes at the first intron sequence.