What type of bond forms between the amino acids to create a protein?
a. Peptide
b. Ionic
c. Covalent
d. None of these choices
e. Hydrogen
a
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A northern blot could be used best to monitor control of gene expression at which of the following steps?
A. DNA methylation B. nucelosome acetylation C. protein ubiquitination D. transcription
The Porifera and Cnidaria have superficially similar body plans. Indicate which of the following does NOT describe equivalent features in the two groups.
A. spongocoel and gastrovascular cavity B. mesohyl and mesoglea C. osculum and mouth/anus D. epithelial cells and epidermis E. spongin and polyp
An activator protein would have which of the following effects on an operon with a positive control
mechanism? a. stimulate transcription b. turn off transcription c. stimulate transcription when a coactivator is bound to the allosteric site d. inhibit transcription when a coactivator is bound to the allosteric site e. no response
An organism that grows slowly in the cold but has an optimum growth temperature of 32°C is called
A. a psychrophile. B. an extremophile. C. a thermophile. D. a facultative psychrophile. E. thermoduric.