Which of the following is a stage of mitosis?
A) cytokinesis
B) telophase
C) interphase
D) DNA synthesis
B
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Chromosomes can be condensed into compact structures, visible with the light microscope, but usually only:
A. while the nuclear pores are open. B. while the proteins are being assembled. C. after the cell is dead. D. while the DNA is being copied into RNA. E. during cell division.
Oxidation
A) involves the removal of oxygen atoms. B) is endothermic. C) occurs when an atom accepts electrons. D) occurs when oxygen is added and energy released. E) both choices B and C
Antibody-mediated responses work against _____
a. intracellular pathogens b. extracellular pathogens c. cancerous cells d. both intracellular pathogens and extracellular pathogens e. both extracellular pathogens and cancerous cells f. intracellular pathogens, extracellular pathogens, and cancerous cells
____ is an anticoagulant used by leeches
a. Chitin b. Hirudin c. Saxitoxin d. Pheromone e. Calcium carbonate