The characteristic ____________of a radioisotope allows us to determine the age of rocks and fossils
using a technique called __________. Fill in the blank(s) with the appropriate word(s).
half-life; radiometric dating
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Which of the following biomolecules interact with toll-like receptors (TLRs)?
A) bacterial LPS B) immunoglobulins C) major histocompatibility complex proteins D) none of these
Answer the following statements true (T) or false (F)
1. Strains of Staphylococcus aureus known as MRSA are resistant to methicillin, but are susceptible to most other antibacterial agents. 2. Bacteria can develop resistance to a particular antimicrobial agent as a result of a chromosomal mutation or the acquisition of a new gene. 3. A bacterial cell that receives an R-factor becomes multidrug resistant. 4. A “superinfection” is an infection that cannot be cured. 5. Using two different antimicrobial agents to treat a patient's infection is referred to as antagonism if the result that is achieved is much better than that which could have been achieved using only one of the drugs.
Vertebrate locomotion results from the contraction of muscles anchored to what other tissue?
A. bone B. an exoskeleton C. each other D. nerves E. the plasma membrane
Which reaction is most likely to have more products than reactants when the reaction reaches
equilibrium?
a. ?G = ?25 kcal/mol b. ?G = ?50 kcal/mol c. ?G = ?75 kcal/mol d. ?G = ?100 kcal/mol e. They will all have the same ratio of products to reactants regardless of the ?G value.