Ergot is:
A. a fungal disease of rye crops and other grasses
B. a carcinogen produced by fungi
C. a predatory fungus that traps nematodes
D. the cause of bread mold
E. a colorful poisonous mushroom
A. a fungal disease of rye crops and other grasses
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Which of the following observations may have resulted in the hypothesis that a codon is made up of three bases?
A) A codon of two bases in length, from four different bases, would code for a maximum of thirty-two different amino acids. B) A codon of three bases in length, from four different bases, would code for a maximum of twelve different amino acids. C) A codon of four bases in length, from four different bases, would code for a maximum of twenty-four different amino acids. D) A codon of three bases in length, from four different bases, would code for a maximum of sixty-four different amino acids.
Which of the following are atmospheric greenhouse gases?
A. methane B. carbon dioxide C. nitrous oxide D. chlorofluorocarbons E. all of the choices
Is the lac operon transcribed when lactose is present?
a. Yes, lactose binds to the repressor, allowing RNA polymerase to bind to the promoter and transcribe the operon. b. Yes, lactose binds to RNA polymerase, allowing it to bind to the promoter and transcribe the operon.
c. No, lactose binds to the repressor, allowing it to bind to the two operators preventing transcription. d. No, lactose has no effect on transcription of the lac operon. e. No, lactose binds to the second operator, blocking transcription by RNA polymerase.
What was the name of the first gene associated with breast cancer?
A. p53 B. cyclin D C. RET D. RB E. BRCA1