What is leghemoglobin, which contains an iron-containing heme group, used for?
a. to remove O2 from roots
b. to produce H2O from O2
c. to deliver O2 to bacteroids
d. to transport O2 in the xylem
Ans: c. to deliver O2 to bacteroids
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Which of the following statements is false regarding phagocytosis?
A) It involves ingestion of large particles by the cell. B) It involves the projection of pseudopodia. C) It is a method used predominantly by amoeba to obtain food. D) It is mediated by clathrin at the plasma membrane. E) In vertebrates, macrophages and neutrophils possess this ability.
A naturalist is studying morphological patterns that are shared between species in two temperate rainforests that are located on different continents. This would be an example of which field of study?
a. biomorphology b. comparative ecology c. biological geology d. comparative geography e. biogeography
Sugars are formed in the chloroplasts ____
a. on the outer membrane b. on the inner membrane c. in the thylakoid compartment d. in the stroma e. within the thylakoid membrane
Individuals with PKU tend to have high levels of _______ in their blood because they have an inactive variant of an _______.
A: phenylpyruvic acid; enzyme B: hemoglobin; oxygen transport protein C: tyrosine; enzyme D: phenylpyruvic acid; oxygen transport protein E: tyrosine; oxygen transport protein