It is assumed that every colony observed on a streak plate arose from a single bacterium
Indicate whether this statement is true or false.
TRUE
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The fossilized remains of two different species are found and scientists are interested in determining the evolutionary relationship of the two species. Which of the following could be used to determine the relatedness?
A. vestigial structures B. biogeography C. homologous structures D. All of the choices could be examined to determine relatedness.
Although MCF-10A breast cancer cells grow well on Matrigel-coated culture dishes, the cells will form cysts of polarized cells that produce milk only when
A) extra collagen is added to the Matrigel. B) extra fibronectin is added to the Matrgel. C) extra elastin is added to the Matrigel. D) the Matrigel layer is thick enough to form a 3D environment. E) the Matrigel layer is present as a very thin layer on the culture dishes.
There is a mutation in a promoter next to a gene such that RNA polymerase can never bind. What steps must occur for the gene to be transcribed?
A) An activator protein must bind an enhancer. B) The DNA must physically bend so that the activator is close to the promoter. C) Transcription factors must bind to the activator and promoter. D) Transcription will never take place in this specific example.
How many moles of total ATPs will be made from 10 moles of acetyl CoA in respiration?
a. 10 b. 12 c. 120 d. 320 e. 360