A pathogenic virus has a new mutation in one of the coat proteins, that just happens to resemble the structure of a normal human protein present in glial cells of the CNS. What do you predict may be an outcome of infection by this virus?
A. The membrane attack complex will be unable to burst the viral membrane.
B. The initial response to the virus will be strong, but will then be shut down by immunological tolerance.
C. An autoimmune disease of the brain may develop.
D. The innate immune system will ignore the pathogen, but the acquired immune system will attack it.
Answer: C
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What is the chemical basis for water's role as the universal solvent?
A. Because water is polar, it disrupts most covalent bonds. B. Because water is polar, it disrupts other hydrogen bonds. C. Because water is polar, it disrupts ionic bonds. D. a and b. E. b and c.
Answer the following statements true (T) or false (F)
1. If lithium has an atomic number of 3 then it will have 1 valence electron. 2. The electronegativity of an atom is a measure of its ability to attract electrons to its outer shell from another atom. 3. Table salt forms from sodium and chloride via hydrogen bonding. 4. Molecules are generally rigid structures and rarely change shape.
Which of the following is NOT found in a
chloroplast?
a. a single outer membrane b. DNA c. ribosomes d. stroma e. thylakoids
The Atlantic Ocean gyre moderates the climate of the eastern coast of North America by bringing in warm currents from the equator
Indicate whether the statement is true or false