After melting a significant quantity of lab equipment during a previous experiment, your colleague decides to recoup his losses by synthesizing trendy vitamin-infused beverages for sale during his off time. He knows that the vitamins he’s chosen won’t dissolve in water, so he’s planning to dissolve them in oil and then blend the vitamin-oil solution into soda water. What’s the flaw in your colleague’s plan?
a. Soda water will leach vitamins from the oil, causing them to settle out of the beverages.
b. Vitamins are only soluble in trans fats, which will negate the health benefits of his products.
c. Oils are hydrophobic, so his beverages will separate before they can be consumed.
d. Carbonation in soda water will cause the fatty acids to decompose into alcohol.
c. Oils are hydrophobic, so his beverages will separate before they can be consumed.
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What type of regulatory transcription factor binds DNA and increases the transcription of a gene?
A. a repressor exerting negative control B. a repressor exerting positive control C. an activator exerting negative control D. an activator exerting positive control E. a combination of both a repressor and activator exerting negative control
Which of the following pairs of structure are homologous?
_____ pectoral fin of a shark and front flipper of porpoise. _____ wing of a dragonfly and wing of a hawk. _____ wing of a bluejay and front flipper of a porpoise. _____ forelimb of a dog and forelimb of a horse. _____ wing of a dragonfly and forelimb of a flying squirrel.
Most genetically modified crops carry genes for ____
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