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Hemoglobin is 50% saturated with oxygen when pO2 = 26 torr. If hemoglobin exhibited hyperbolic binding (as myoglobin does) with 50% saturation at 26 torr, what would be the fractional saturation when pO2 = 30 torr and 100 torr? What does this tell you about the physiological importance of hemoglobin's sigmoidal oxygen-binding curve?
You identify a novel bacterial species from a deep sea hyrothermal vent that lacks 5'-dNTPs. The DNA in this organism has the normal anti-parallel double stranded helix with 3'- 5' phosphodiester bonds.
Bacteria can cause diseases by using their toxin to interfere with body process. Most Viruses do not encode toxins, cannot overcame body defense. How do viruses cause disease.
Each protofilament in a microtubule is assembled from subunits of alpha-tubulin and Beta-tubulin subunits. Please describe how the organization of the subunits contributes to the protofilament's polarity and differences between the two ends.
Which of the following statements about DNA replication is true? Okazaki fragments are DNA fragments synthesized on the leading strand. Single?strand binding proteins stabilize the open conformation of the unwound DNA.
Explain the composition of the genetic material in bacteria, in archaea and in eukaryotic cells. Distinguish between the structure and function of the genetic material as chromotin and as chromosomes.
Colchicine is a chemical that prevents the formation of microtubules. What would be the effect of adding colchicine to cells just before mitosis were to begin.
Explain the female gametophyte of a seed plant and discuss how is the angiosperm life cycle different from the moss life cycle?
give Name the three major components of a homeostatic control system and tell briefly the function of each component.
A rare autosomal recessive disorder causes pink hair. A non-carrier male and an affected female marry. Think about the following pedigree and RFLP analysis prepared using HindIII.
Both endocrine and nervous systems are major regulating systems of the body; though, nervous system has been compared to an airmail delivery system and endocrine system to the pony express. In brief explain this comparison.
If an individual was exercising at an exercise intensity of 1.5 liters of oxygen per minute, and had a mechanical efficiency of 20 percent, how many heat Calories would this person generate in 30 minutes?
How can caffeine cause a muscle fiber to contract and generate force, but without generating an end plate potential or action potential of the membrane?
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