What step in the respiratory process of mammals requires the most energy?
A. Binding of oxygen to hemoglobin
B. Activity of carbonic anhydrase in the lungs
C. Inhalation
D. Movement of carbon dioxide into red blood cells
E. Transport of oxygen across the walls of the alveoli
F. Exhalation
Answer: C
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Place the steps of biofilm formation in the correct order. _____ Surface (substratum) is preconditioned by environmental molecules. _____ Quorum sensing and the establishment of the extracellular matrix commences as microbes attach more stably. _____ Biofilm matures and some microorganisms escape to the planktonic state. _____ Microbes attach and detach from the preconditioned surface.
Fill in the blank(s) with the appropriate word(s).
Pattern recognition receptors (PRRs) are found on which of the following cells?
A) macrophages B) bacteria C) neutrophils D) macrophages and neutrophils
Which of the following events is least likely a result of protein phosphorylation?
A. reduction in the activity of an enzyme B. transport of the protein to the nucleus C. the specific binding of a regulatory protein D. targeting of the protein for degradation
Which function earlier in development: maternal-effect genes or zygotic genes?
What will be an ideal response?