Which statement concerning the auxin F-box protein is false?
a. It is located in the nucleus.
b. It is a type of receptor.
c. It is involved in catalyzing the addition of ubiquitin tags.
d. Plants have about 700 of these.
e. An example is the transport inhibitor response 1 protein.
a
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As you and a friend are entering a chemistry laboratory at your university, you see a sign that states: DANGER—RADIOACTIVE ISOTOPES IN USE. Your friend is an accounting major and has not had any science courses yet. She asks you what a radioactive isotope is and you respond correctly with:
A. Radioactive isotopes are atoms that are unstable and as a result emit energy in a process called radioactive decay. B. Radioactive isotopes are atoms that are stable and as a result emit energy in a process called radioactive decay. C. Radioactive isotopes are atoms that are stable and as a result only emit energy if they are exposed to higher temperatures. D. Radioactive isotopes are atoms that are unstable but unless actively disturbed by some chemical process will remain intact and pose no problems.
Ribosomes that do not anchor on the surface of the rough endoplasmic reticulum during translation most probably
A) are synthesizing cytoplasmic proteins. B) have a defect in ribosomal proteins that allow attachment to the surface. C) have a signal peptidase error. D) do not make the appropriate anchor protein. E) all of the above
You are working on a forensics team and collect some cells from a crime scene. The cells are angular, rigid, and have a cell wall made up of cellulose. This sample most likely came from a(n)
A. fungus. B. bacterium. C. protist. D. animal. E. plant.
The "skeleton" of a typical sponge is composed of
a. bones. b. cartilages. c. spicules. d. scales.