Transmutation of an element (the change of an element into a different element) occurs due to
a. exposure to strong sunlight.
b. exposure to certain chemicals.
c. natural aging of the element.
d. combining with another element.
e. radioactive decay.
E
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Which of the following virulence factors used by Staphylococcus puts holes in host cells?
A. Protein A B. Alpha toxin C. Leukocidin D. Clumping factor
An example of microbial ________ is the ability of Vampirococcus to attach to the outer membrane of its prey and then secrete degradative enzymes that result in the release of the prey's cytoplasmic contents.
Fill in the blank(s) with the appropriate word(s).
The length of a DNA sequence is _____ than the mature mRNA transcribed from it, because
A. shorter it does not contain exons. B. equal it was transcribed from the DNA sequence. C. longer it does not contain introns. D. shorter each codon of three bases encodes only one amino acid. E. longer each codon of one amino acid encodes three bases.
The organelle featured in Figure 4-3:
a. is present in a few prokaryotes.
b. is the major site of protein synthesis in the cell.
c. plays a vital role in packaging materials to be secreted.
d. plays a central role in energy metabolism.
e. is located in the nucleus