the circular muscles which control the movement of materials from one digestive system structure to the next are called
What will be an ideal response?
sphincters
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Phosphofructokinase is an allosteric enzyme in the glycolysis pathway. Regulation of glycolysis is directly related to the level of ATP and citrate. If ATP or citrate levels are high, phosphofructokinase will be inhibited
What will happen to this enzyme when ATP levels drop? A. Phosphofructokinase will be inhibited. B. Phosphofructokinase will be activated. C. Metabolism of citrate will be inhibited. D. Metabolism of phospholipids will be activated. E. Metabolism of phospholipids will be inhibited.
Transcription factors control which of the following phases of pattern formation in the human embryo?
A. formation of body axes and segmentation B. segmentation and development of segment characteristics C. segmentation, development of segment characteristics, and cell differentiation D. formation of body axes, segmentation, development of segment characteristics, and cell differentiation E. cell differentiation
Ocean productivity is not: a. the amount of food marine organisms can produce
b. a leading field of research. c. the amount of organisms actually harvested each year by people. d. the number of organisms the ocean can support.
Which of the following is NOT a feature associated with viruses?
A. Cytoplasm B. Genetic information C. Protein coat D. Envelope