Oxygen and carbon dioxide are exchanged with blood directly across the alveoli wall
Indicate whether the statement is true or false
TRUE
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Where is the trp repressor gene located?
a. just upstream of the trp operon b. on a region of the chromosome distant from the trp operon c. adjacent to the lac repressor gene d. just downstream of the trp operon e. directly adjacent to the promoter region of the trp operon
Could two individuals who were heterozygous for the Huntington's allele have a normal child?
a. Yes b. No
Which of the following plants were dominant
in the Carboniferous period?
a. club mosses b. peat mosses c. ferns d. liverworts e. more than one of these
Which of the following statements about the lac operon is not true?
a. When the inducer binds to the repressor, the repressor can no longer bind to the operator. b. When the inducer binds to the operator, transcription is stimulated. c. When the repressor binds to the operator, transcription is inhibited. d. When the inducer binds to the repressor, the shape of the repressor is changed. e. The repressor has binding sites for both DNA and the inducer.