Glucose-6-phosphate dehydrogenase deficiency (G6PD) is inherited as a recessive allele of an X-linked gene in humans. A woman whose father suffered from G6PD marries a normal man
(a) What proportion of their sons is expected to be G6PD? (b) If the husband was not normal but was G6PD deficient, would you change your answer in part (a)? A) (a) 100%; (b) no
B) (a) 1/2; (b) yes
C) (a) 1/2; (b) no
D) (a) zero; (b) no
C
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What is the difference between the allosteric and torpedo models of eukaryotic transcritponal termination?
A. The allosteric model is that RNA pol II becomes destabilized after transcription of the poly A signal sequence while the torpedo model is that the polymerase is physically removed from the DNA B. The torpedo model is that RNA pol II becomes destabilized after transcription of the poly A signal sequence while the allosteric model is that the polymerase is physically removed from the DNA C. The allosteric model is that RNA pol II becomes destabilized after transcription of the stop codon sequence while the torpedo model is that the polymerase is physically removed from the DNA D. The torpedo model is that RNA pol II becomes destabilized after transcription of the stop codon while the allosteric model is that the polymerase is physically removed from the DNA E. The only difference between the two models is the proteins that are involved in removing the RNA pol II from the DNA
Glycolysis occurs in the
A. cell membrane. B. lysosome. C. cytoplasm. D. nucleus. E. mitochondria.
In malaria, Plasmodium falciparum grow inside of which human cells?
a. Liver and red blood cells b. Liver cells c. Red blood cells d. Intestinal cells e. Liver and intestinal cells
Scientists disagree about how many species are currently on earth for all of the following reasons EXCEPT:
a) there is controversy over whether natural selection is the only mode of speciation. b) there is not one true definition of species. c) at any one time, there are few populations in the process of speciation. d) there are many organisms on Earth that have yet to be discovered. e) different scientists use different techniques to estimate the actual number of species from the known number of species.