The abundant protein in blood, which is arguably the most critical for oxygen homeostasis in the body, is
A. myoglobin.
B. actin.
C. fibrinogen.
D. hemoglobin.
E. myosin.
D. hemoglobin.
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Which set contains the most closely related terms?
A) megasporangium, megaspore, pollen, ovule B) microsporangium, microspore, egg, ovary C) megasporangium, megaspore, egg, ovule D) microsporangium, microspore, carpel, ovary
Before a desired gene can be spliced into a bacterial plasmid cloning vector, the gene must first be from the original DNA.
A. precisely cut, with a restriction enzyme, B. glued, with ligase, C. injected into a bacterial cell or a virus, having different sequences D. injected into a stem cell, to determine any unwanted traits E. All of the answer choices are correct.
Epidemiologists classify diseases by their mortality rate (the percent of infected individuals who die from the disease) and by their communicability (how easy it is to transmit the disease). Which of the following diseases of the cardiovascular system is mismatched with a description of its properties?
A. Plague; somewhat high mortality rate and low communicability B. Ebola; high mortality rate and high communicability C. Malaria; low mortality rate and high communicability D. AIDS; high mortality rate and low communicability
In pure water, a red blood cell from an animal will swell and burst, but a leaf cell from a plant will not. Which structure in the leaf cell is responsible for this difference?
A. cell membrane B. cell wall C. mitochondrion D. nucleus