Blog

BA The bacterial surface structure that provokes phagocytosis or endocytosis to enter host cells describes which one of the following?

BA A 2 year old boy with a persistent cough is diagnosed with cystic fibrosis. A sputum specimen of green mucus was obtained and sent for Gram stain and culture. A Gram-negative rod was isolated that was subsequently identified as Pseudomonas aeruginosa. Which of the following properties is associated with this organism that will ultimately pose the greatest threat to the long-term survival of this patient?

Which of the following can function like a molecular “sponge” by binding to many microRNAs and preventing them from functioning?

MT All DNA viruses replicate in the nucleus EXCEPT which one of the following?

The GAL gene system discovered in yeast is an inducible system in which the presence of galactose induces expression of genes that are regulated by GAL4. For GAL4 to initiate transcription, what type of sequence must be present, adjacent to the gene(s) to be transcribed?

Usually, in the zygote, there is global demethylation of the DNA before cells begin to differentiate. If some regions of DNA escape this demethylation, and an allele from either the mother or father is silenced, what is this called?

In prokaryotes, which DNA polymerase is responsible for removing the RNA primers and replacing them with DNA?

Regarding the tryptophan (trp) operon, which is a repressible gene system in coli, which of the following occurs when abundant trp is present in the cell?

Which of the following is an important characteristic that affects translation in eukaryotes that is different from prokaryotes?

During DNA replication in eukaryotes, which problem does the telomerase enzyme help to overcome?