Which of the following is a substrate of ATM (ataxia telangiectasia mutated) or ATR?
A. Cdc25A
B. Cdc25C
C. cyclin B
D. Chk1
E. Rb
Ans: D. Chk1
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How can freeze-fracture be used to determine the orientation of a protein in a membrane?
A. Freeze-fracture allows a cell to be cleaved in between the lipid bilayer, splitting the plasma membrane into two layers. B. Freeze-fracture allows a cell to be cleaved in such a way as to preserve the embedded proteins. C. Freeze-fracture cuts the membrane in protein-sized components for viewing under an electron microscope.
The starting point of a gene on the DNA where the RNA polymerase binds is called the
A. codon. B. promoter. C. terminator. D. amino acid attachment site. E. anticodon.
The relationship between two hormones that work together is referred to as
a. opposing interaction. b. synergistic interaction. c. permissive interaction. d. mutualistic interaction. e. commensal interaction.
At the Beautiful Mutants Flower Shop, a variety of unique mutant plants are sold. What would be the best flower to give to a friend who is allergic to pollen?
A. "Superhunk" -- a plant with a mutation in the class A genes. B. "Beautiful Innocence" -- a plant with a mutation in the class C genes. C. "Clockface" -- a plant with a mutation in the CYCLOIDEA gene. D. "Suspense" -- a plant with a mutation in the LEAFY gene.