There are no algae that can cause human disease.
Answer the following statement true (T) or false (F)
False
You might also like to view...
The cellular changes associated with long-term potentiation are localized to:
A. the postsynaptic cell. B. the presynaptic cell. C. both pre- and postsynaptic cells.
Answer the following statements true (T) or false (F)
1. The exoenzyme that causes toxic shock syndrome is called erythrogenic toxin. 2. The neurotoxins produced by Clostridium botulinum and Clostridium tetani cause a spastic, rigid type of paralysis. 3. Although most people use the terms “infection” and “infectious disease” synonymously, microbiologists define infection as colonization by a pathogen. 4. Avirulent strains do not cause disease. 5. It is thought that the waxes in the cell walls of Mycobacterium tuberculosis protect this pathogen from digestion within phagocytes.
Many receptor tyrosine kinase (RTK) pathways lead to the activation of Ras. To activate Ras, it is necessary to recruit a guanine nucleotide exchange factor to the plasma membrane, because Ras is a membrane associated protein. Guanine nucleotide exchange factors, such as SOS, stimulate the exchange of GDP for GTP. However, SOS cannot bind directly to most RTKs. The protein Grb2 has a domain that
can bind to phosphorylated tyrosines, and another domain that can bind to SOS. Therefore, Grb2 can bind to active RTKs and recruit SOS to the plasma membrane. Grb2 is an example of what kind of signaling molecule? A. Scaffold B. Adapter protein C. Second messenger D. Enzyme
Why does immersion oil improve resolution?
A) It allows light to travel at a uniform speed on its way to the lens. B) It decreases the working distance. C) It increases the numerical aperture. D) It increases numerical aperture and maintains a uniform light speed. E) It increases the angle of refraction of the light.