Explain why creatinine is used as a marker of kidney function
What will be an ideal response?
Answer: Creatinine is a muscle breakdown product, produced at a relatively constant rate, that is filtered but not reabsorbed by the kidney. A rise in the blood may indicate that the kidneys are not filtering as much blood as they used to.
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During electron transport reactions,
A) OH- accumulates on the outside of the membrane while H+ accumulates on the inside. B) OH- accumulates on the inside of the membrane while H+ accumulates on the outside. C) both OH- and H+ accumulate on the inside of the membrane. D) both OH- and H+ accumulate on the outside of the membrane.
Tuberculosis remains a serious worldwide health problem due to all of the following except
A. multi-drug resistance. B. social factors such as crowding and incarceration. C. the prevalence of HIV infections. D. ease of transmission. E. absence of MDR strains.
What is the most assured method of identifying an individual?
a. full genome sequencing b. short tandem repeat analysis c. SNP-chip analysis d. DNA-DNA hybridization e. PCR amplification
What would you predict about the presence of Hox genes in the last common ancestor of vertebrates and invertebrates? (Select all that apply)
A. The genes specified anterior-posterior development. B. If mutated, there would be an extra pair of wings and legs growing from the head. C. The genes contained a MADS-box. D. That ancient ancestor was too primitive to have Hox genes. E. The genes were in four clusters. F. The genes were in anterior-posterior order on the chromosome. G. The genes contained homeoboxes.