A new plant nutrient is discovered that is needed at 5g/kg of plant dry matter and is required for photosynthesis. When this nutrient is added to the plant as a fertilizer, plant growth increases in comparison to a control group that did not receive the nutrient fertilizer.This nutrient is: (check all that apply)
_____ an essential element.
_____ a macronutrient.
_____ a micronutrient.
_____ a limiting factor.
__X__ an essential element.
__X__ a macronutrient.
_____ a micronutrient.
__X__ a limiting factor.
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mRNAs with a short-half life may have a(n):
A. 5me-G cap. B. AU-rich region. C. IRE structure in the 5' UTR. D. GM-CSF coding region.
L-amino acids occur in proteins and are designated
A. unnatural. B. natural. C. rare. D. left handed. E. natural AND left handed.
Which of the following statements regarding coliform bacteria is correct?
A. Coliforms derive from the intestinal tract and therefore indicate fecal contamination. B. Petri dishes used to enumerate coliforms are best incubated at 45-48°C. C. The presence of Klebsiella is a strong indicator of fecal contamination. D. Coliforms from the human and bovine GI tracts differ, so identifying the specific microbe will indicate the source of contamination.
How many molecules of carbon dioxide (CO2) would be produced by five turns of the citric acid cycle?
A) 2 B) 5 C) 10 D) 12 E) 60