Which enzyme catalyzes the reaction: O2- + O2- + 2H+ ? H2O2 + O2?
A) catalase
B) oxidase
C) peroxidase
D) superoxide dismutase
D
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Lupins are an angiosperm genus having "cluster roots," which are roots that have high metabolic rates and exude large quantities of organic acids to the soil. What purpose might exuding organic acids serve?
A. It provides energy for free-living soil microbes. B. It provides energy for symbiotic microbes. C. It raises soil pH to liberate tightly bound minerals. D. It lowers soil pH to liberate tightly bound minerals.
What is meant by dosage compensation?
What will be an ideal response?
What hormone(s) can be used commercially to
prolong the shelf life of cut flowers? a. abscisic acid b. cytokinins c. auxins d. ABA e. ethylene
Swelling of one or more lymph nodes is referred to as _______
Fill in the blank(s) with the appropriate word(s).