What is at the center of a heme molecule in a hemoglobin protein?
a. a beta globin chain
b. an alpha globin chain
c. iron
d. nitrogen
e. another heme molecule
ANSWER: c
Biology & Microbiology
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Endergonic reactions require the ______ of energy, while exergonic reactions ______ energy.
a. release; input b. input; release c. output; input d. creation; destruction
Biology & Microbiology
The ________ are fungi that have lost the ability to reproduce sexually.
A. zygomycetes B. ascomycetes C. basidiomycetes D. imperfect fungi
Biology & Microbiology
If the auxin that is produced by an apical meristem is transported in equal amounts down all sides of a twig, the twig will probably
A) elongate evenly. B) branch near its tip. C) flower. D) bend away from the apical meristem.
Biology & Microbiology
One of the best exercises for people with leg or foot problems is running.
a. true b. false
Biology & Microbiology