Which of the following is NOT an example of kinetic energy?
A. heat
B. light
C. sound
D. the energy in chemical bonds
E. random molecular movement
Answer: D. the energy in chemical bonds
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A protein that is destined to reach the plasma membrane is making its way through the Golgi. At that moment, a drug was added to cells, blocking trafficking at the trans face of the Golgi. As a result, what would happen to the protein?
A. The protein would continue on to the cell surface. B. The protein would be stuck in the Golgi. C. The protein would return to the endoplasmic reticulum via the trans face of the Golgi. D. The protein would exit the Golgi, but instead be targeted to the cytoplasm.
Which of the following is not true of the lac operon?
A. Transcription produces a single polycistronic mRNA containing the lacZ, lacY, and lacA genes. B. The lacI gene is controlled from the same promoter as the lacZ gene. C. The Lac repressor protein is constitutively expressed. D. The operator region regulates transcription through interaction with the Lac repressor protein.
Why are native plants important for butterfly populations?
a. Larvae often will not eat non-native plants b. Adult butterflies will not eat nectar from non-native plants c. Pupae cannot hang properly from non-native plants d. All of the above
What is one function of the pyloric sphincter?
a. Prevents esophageal contents from emptying too quickly into the stomach b. Prevents stomach contents from backing up into the esophagus c. Prevents intestinal contents from backing up into the stomach d. Prevents intestinal contents from emptying too quickly into the colon