What chemical causes death in many eukaryotes because it blocks cytochrome C oxidase?
A. Oxygen
B. Iron
C. Carbon monoxide
D. Cyanide
E. Copper
Answer: D
Biology & Microbiology
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All arthropods _____
1) undergo complete metamorphose 2) have jointed appendages 3) molt 4) have segmented bodies 5) have an exoskeleton or cuticle A) 1, 2, and 4 B) 3 and 5 C) 2, 3, 4, 5 D) 1, 4, 5 E) 1, 2, 3
Biology & Microbiology
Assuming that all is working properly, which of the following is at a higher energy level?
A. An excited-state reaction center chlorophyll B. An excited-state antenna chlorophyll
Biology & Microbiology
This enzyme is responsible for breaking the backbone on the DNA double helix
A. supercoilase B. topoisomerase II C. nucleoidase D. transcriptase E. polymerase
Biology & Microbiology
In animal cells, what structure is homologous to plasmodesmata?
a. desmosome b. tight junction c. gap junction d. proteoglycan
Biology & Microbiology