Which one of the following food contaminations is best prevented by cooking to safe temperatures?
A) Botulism
B) E. coli
C) Spoilage
D) Acidophilus
Answer: B) E. coli
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The discovery of ____ suggested that nucleic acids likely existed prior to proteins
a. RNA b. ribozymes c. RNA polymerase d. peptide bonds e. endoplasmic reticulum
When an electron absorbs energy, it moves to a ________, and when it releases that energy, it ________
a. lower orbital / returns to its original position b. none of the choices c. higher orbital / returns to its original position d. higher orbital / emits radioactivity
Phototropins repress transcription of a gene that causes auxin efflux carriers to be distributed evenly around the cell. What happens next, when phototropins are released as a response to a plant cell being exposed to a directional light source?
a. Auxin efflux carriers become positioned on the sunny side of the plant. b. Auxin efflux carriers become positioned on the shady side of the plant. c. Auxin buildup occurs within the cells, but in no set pattern. d. Auxin efflux carriers become positioned on the shady side of the plant and the plant bends towards the light. e. Auxin efflux carriers become positioned on the sunny side of the plant and the plant bends towards the shade.
Embryonic stem cells are pluripotent, able to ____
a. divide an unlimited amount of times b. give rise to most, but not all body cell types c. give rise to any of the body cell types d. divide a limited amount of times e. give rise to different, unique individuals