Lysosomes contain enzymes that are so destructive that if the enzymes were released from these organelles, they would damage or kill the cell that contains them
Indicate whether the statement is true or false
TRUE
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Oxygen-16 is abundant and has 8 protons and 8 neutrons. Oxygen-18 is a(n) ________ of oxygen-16.
A. ion B. dimer C. isomer D. isotope
The membrane attack stage of the complement cascade involves
A. C1q binds to surface receptors on a membrane. B. cleaving of C3 to yield C3a and C3b. C. initiation of the cascade. D. production of inflammatory cytokines. E. the assembly of a ring-shaped protein that forms holes in bacterial cell membranes and virus envelopes.
The greater the number of links in a food chain, the higher the
A) species diversity. B) number of top predators. C) connectance. D) mean chain length.
____ are responsible for antibody-mediated immunity
a. Natural killer cells b. Macrophages c. T cells d. B cells e. Dendritic cells