A possible mutagen is
a. UV light
b. translocation
c. an anticodon
d. hemoglobin
Ans: a. UV light
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Which protein is responsible for the production of ATP during oxidative phosphorylation?
a. ATPase b. glucase c. ATP synthase d. ADP synthase
In the technique of embryo splitting, _____
a. two embryos are fused b. an embryo is split apart to form two identical individuals c. two sperm are used to fertilize a single egg d. two eggs and two sperm are used to form two embryos e. an embryo’s nucleus is removed and replaced with an adult embryo
Nitrogen is important in the mutualism between legume plants and Rhizobium bacteria
Indicate whether the statement is true or false
In the absence of glucose, how does the lac operon function when lactose is present?
A) Lactose binds to the repressor protein and alters its shape so it can no longer bind to the operator. RNA polymerase is then able to bind to the promoter and transcribes genes necessary for metabolizing lactose. B) Lactose binds to the operator, preventing the repressor protein from binding to the promoter. RNA polymerase is then able to bind to the promoter and transcribes the genes necessary for metabolizing lactose. C) A repressor protein binds to the operator, which prevents RNA polymerase from binding to the promoter. D) A repressor protein binds to the operator, preventing lactose from binding to the operator. RNA polymerase then binds to the lactose and breaks it down. E) Lactose binds to a repressor protein. The repressor protein then binds to RNA polymerase, which metabolizes the lactose and dismantles the repressor protein.