Non-toxin-producing strains of Corynebacterium diphtheriae could infect the body but would not cause the typical symptoms of diphtheria.
Answer the following statement true (T) or false (F)
True
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In proteins, nitrogen bases link covalently to ribose in DNA
Indicate whether the statement is true or false.
Which radical idea did Cuvier propose based on his studies of Earth’s history?
a. extinction of species b. evolution of species c. Earth as billions of years old d. an unchanging Earth e. static species composition
Which of the following is most likely the cause of the current extinction crisis?
a. asteroid impact b. human activity c. adaptive radiation d. tectonic activity e. rising sea levels
Thermal motion promotes lateral position exchanges between lipid molecules within a monolayer. In an artificial bilayer, this movement has been estimated to be ~2 ?m/second. This represents the entire length of a bacterial cell
Do you expect the lateral movement of a lipid molecule within a biological membrane to be equally fast? Explain your answer.