Which of the following is true of both positive and negative gene regulation?
a. They directly reduce the rate of transcription of certain genes.
b. They involve transcription factors (or RNA) binding to DNA.
c. They involve transcription of all genes in the genome.
d. They are not both active in the same organism or virus.
e. They act away from the promoter.
Answer: b. They involve transcription factors (or RNA) binding to DNA.
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The fusion of gametes, resulting in the formation of a zygote, is called ____
Fill in the blank with the appropriate word.
In the section "Investigating Life: Birds Do, Bees Do It", what hypothesis did the researchers test?
A. Mutation in a single gene could cause a change in flower color and thus pollinator. B. Mutation in multiple genes over a long period of time is required to change flower color and pollinators. C. Pollinators do not choose which flowers to pollinate based on color. D. M. lewisii and M. cardinalis are the same species. E. M. lewisii and M. cardinalis are different species.
The carbon atoms in the cellulose of a wood log originally came from _____ absorbed by the plant.
A. glucose B. carbon dioxide C. nutrients in the soil D. water E. oxygen
The rising of bread dough is the result of
A) biotin production. B) carbon dioxide produced by fermentation. C) oxidative phosphorylation. D) oxygen being released.