Much of the control of the digestive system originates in the neuron networks of the submucosa
Indicate whether the statement is true or false.
ANSWER: True
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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.
To generate a knockin mouse, a scientist introduces to ES cells a construct with a mutant exon and within an adjacent intron, loxP sites flanking a neomycin resistance gene. What event will occur next?
A) Homologous recombination between the mutant DNA and the corresponding gene in the mouse genome. B) Recombination between the loxP sites. C) Transplantation of cells into host blastocyst. D) Crossing of heterozygous mice to a Cre-expressing strain.
The first land animals, arthropods, moved onto land about:a
650 million years ago. b. 450 million years ago. c. 250 million years ago. d. 150 million years ago. e. 50 million years ago.
What is the role of the fungus in a mycorrhizal association?
A) contribution to photosynthesis B) absorption of water, phosphate, and other minerals C) secretion of growth factors D) release of water