Phospholipase C hydrolyzes a membrane phospholipid to produce
A. diacylglycerol only.
B. both IP3 and protein kinase C.
C. IP3 only.
D. both IP3 and diacylglycerol.
E. protein kinase C only.
Answer: D
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When comparing genes from Archaea, Bacteria, and Eukarya, which statement is TRUE?
A) Almost all archaeal genes are more similar to eukaryotic genes than to bacterial genes. B) Almost all archaeal genes are more similar to bacterial genes than to eukaryotic genes. C) Genes in Archaea involved in DNA replication, transcription, and translation are more similar to those of Eukarya, while those encoding metabolic functions other than information processing are more similar to those of Bacteria. D) Archaeal genes are almost universally unique; very few are similar to either eukaryotic or bacterial genes.
In humans, the ____ bone is found in the pectoral girdle
a. clavicle b. humerus c. radius d. sternum e. tibia
Each tier of the biomass pyramid depicts the
__________ of all the organisms in an ecosystem. a. size b. number of species c. dry weight d. total weight e. total utilization of materials
Entropy is a measure of an increase in
A) high-level energy. B) kinetic energy. C) potential energy. D) organization. E) randomness.