Which of the following bacterial enzymes causes the release of lysosomal contents into the cytoplasm of the phagocytic cell, leading to the death of the cell?
A. Protein H
B. Leukocidin
C. M protein
D. IgA protease
Ans: B. Leukocidin
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When is a glucose molecule produced by the Calvin cycle?
a. after three turns, during the Fixation stage b. after six turns, during the Regeneration stage c. after six turns, during the Reduction stage d. after eight turns, during the Fixation stage
A state or national park in your area conserves natural wildlife and plant florae in a community that remains fairly constant over time. This is an example of .
A. competitive exclusion B. commensalism C. an apparent climax community D. species evenness E. succession
How do endotherms and ectotherms derive most of their body heat?
A. Both ectotherms and endotherms derive most of their body heat through their environment. B. Ectotherms derive most of their body heat through their environment, while endotherms derive most of their body heat through metabolic processes. C. Both ectotherms and endotherms derive most of their body heat through metabolic processes. D. Ectotherms derive most of their body heat through metabolic processes, while endotherms derive most of their body heat through their environment E. Ectotherms derive most of their body heat through their fur, while endotherms derive most of their body heat through insulating scales.
Crossing over is partially responsible for our genetic diversity
a. True b. False