The Drosophila regulatory segment that defines the location of Eve stripe 2 contains binding sites for four different transcription regulators: two repressors (Giant and Krüppel) and two activators (Bicoid and Hunchback). For Eve to be efficiently expressed in stripe 2, both repressors must be absent and both activators present. What would you expect to see in flies that lack the gene that encodes Bicoid? (Assume that Bicoid does not influence the expression of Hunchback, Giant, or Krüppel.)

Salmonella typhimurium is a food-borne bacterial pathogen that can cause severe gastrointestinal disease. salmonella is often phagocytosed by macrophages that normally destroy bacterial pathogens, but this bacterium is somehow able to prevent the complete maturation of phagolysosomes. salmonella is able to tolerate the low ph of phagolysosomes, and in fact responds to the drop in ph by secreting toxins that interfere with other cellular responses. which of the following differences would you expect to contribute to the survival of a bacterium within an salmonella-containing phagosome, compared to a healthy phagolysosome? decreased activity of acid hydrolases increased activity of acid hydrolases decreased import of h+ ions increased import of h+ ions my guess is decreased activity of acid hydrolases but i'm not sure.

Fa child has tay sach's disease, what would her parents' genotypes be? a) her father is heterozygous; her mother is heterozygous. b) her father is heterozygous; her mother is homozygous dominant. c) her father is homozygous dominant; her mother is homozygous dominant. d) her father is homozygous dominant; her mother is homozygous recessive.

Aperson who is interested in finding a cure for diabetes, in which the pancreas does not produce insulin, might pursue a career in 1.) endocrinology 2.) gene therapy 3.) neuroscience 4.) sports medicine