Which of the following is an active enzyme?
A) apoenzyme
B) cofactor
C) coenzyme
D) holoenzyme
E) subtrate
D
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Most atmospheric oxygen comes from photosynthesis. From which of the following molecules is the oxygen derived?
A. water B. carbon dioxide C. glucose D. chlorophyll a E. chlorophyll b
Free fetal DNA (ffDNA) originates from the breakdown of fetal cells and their nuclei in the ____________________
Fill in the blank(s) with correct word
A person's spleen may be removed (splenectomy) if it becomes enlarged due to certain types of cancer, traumatic injury, or damage. What part of the immune system will be most affected by a splenectomy?
A) internal innate immunity B) external innate immunity C) adaptive immunity D) lymphatic system
A membranous sac that contains interacting organic molecules, hypothesized to have formed prior to the earliest life-forms:
A. protocell. B. archaea. C. ribozyme. D. chemotroph. E. protist.