Describe what is meant by a gratuitous inducer. Give an example
What will be an ideal response?
A gratuitous inducer is a chemical analog of a natural inducer. It serves as an inducer but is not a substrate for the reactions related to the natural inducer. Isopropylthiogalactoside (IPTG) is a gratuitous inducer of the lactose operon.
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At the cellular level, the development of an adult animal from a fertilized egg involves ____
a. mitosis only b. meiosis only c. cell differentiation only d. mitosis, cell differentiation, and morphogenesis e. meiosis, cell differentiation, and morphogenesis
Turner syndrome is a
a. monosomy. b. trisomy. c. condition with the normal set of chromosomes. d. condition affecting only boys. e. more than one of these.
Which group in the peacock butterfly experiment had the highest survival rates?
a. Those with more nocturnal habits b. Those without spots and without hissing/clicking sounds c. Those without spots but with hissing/clicking sounds d. Those with spots and hissing/clicking sounds e. Those with the same flower habitat as the birds
Which of the following is(are) true concerning
tetanus? a. The pathogen spreads through the air. b. The pathogen is ingested through tainted canned food. c. The pathogen is a virus. d. A toxin blocks the release of GABA. e. All of these are true.