Carbon has four valence electrons and oxygen has six. Carbon dioxide would contain ________.
A. two double covalent bonds
B. two single covalent bonds
C. four hydrogen bonds
D. one single covalent bond
Answer: A
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The eukaryotic transcription initiation complex is
_____ transcription of virtually all genes transcribed by RNA pol II requiring the same suite of general factors. _____ responsible for highly regulated transcription levels. _____ only associated with RNA polymerase I. _____ interactive with activators through DNA looping. _____ a basal factor associated with RNA pol II after positioning RNA pol II at the start site.
In the G protein-coupled signal transduction pathway, the enzyme phosphodiesterase is responsible for the inactivation of:
A. the alpha subunit of a G protein. B. protein kinase A. C. adenylyl cyclase. D. All of these answer options are correct.
Outgroup analysis looks for features that are shared derived characters in a given group of organisms. Indicate whether the statement is true or false
The first group of cells to migrate through the blastopore will become
A. neurons of the peripheral nervous system. B. notochord. C. neurons of the brain. D. epidermis. E. yolk plug.