Which element of the skeletal system assists almost every system of the body?
a. phosphorus
b. calcium
c. magnesium
d. iron
e. manganese
B
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The ATP made during glycolysis is generated by
A. substrate-level phosphorylation. B. electron transport. C. photophosphorylation. D. chemisosmosis. E. oxidation of NADH to NAD+
All of the following lead to increased genetic variation in a population EXCEPT
a. migration. b. dispersal. c. asexual reproduction. d. mutation.
Many algal species have life cycles consisting of alternating haploid and diploid generations. The most
common life cycle in brown algae consists of organisms that are
a. unicellular in the haploid stage and multicellular in the diploid stage. b. multicellular in the haploid stage and unicellular in the diploid stage. c. unicellular in both the haploid and diploid stages. d. multicellular in both the haploid and diploid stages. e. colonial in both the haploid and diploid stages.
The function of phosphatases in signal transduction is best described as to
A) move the phosphate group of the transduction pathway to the next molecule of a series. B) prevent a protein kinase from being reused when there is another extracellular signal. C) amplify the transduction signal so it affects multiple transducers. D) amplify the second messengers such as cAMP. E) inactivate protein kinases and turn off the signal transduction.