Which of the following processes do not require plants to spend energy? Choose all that
A. water transport through xylem
B. carbohydrate transport through phloem
C. C3 photosynthesis
D. C4 photosynthesis
E. nutrient transport across endoderm cells
A
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Glucose is converted into glucose 6-phosphate by hexokinase. Glucose 6-phosphate then serves as the substrate for the enzyme phosphoglucose isomerase, which converts this reactant into fructose 6-phosphate. Fructose 6-phosphate serves as the substrate for phosphofructokinase, which converts fructose 6-phosphate into fructose 1,6-bisphosphate. Based on the information provided, this is an example of what?
A. Feedback inhibition B. Allosteric regulation C. A metabolic pathway D. Enzyme inhibition
Kisspeptin is a protein that in humans has an important role in initiating secretion of the releasing factor gonadotropin-releasing hormone (GnRH)
Endocrinologists are finding that the protein kisspeptin and its receptor are central to sexual maturation at puberty. If kisspeptin directs the release of GnRH, you would expect that the receptors for kisspeptin will be found in cells of the: A. anterior pituitary. B. posterior pituitary. C. hypothalamus. D. gonads.
Some nerves are myelinated, and others are not. Myelinated nerves send signals faster than unmyelinated neurons. Draw two neurons of equal length, and wrap segments of myelin along one. Be careful to leave spaces for the nodes of Ranvier
Now, measure the exposed axons of each, and total up the distance. Describe why the myelinated neurons send signals faster.
The area over which an animal moves in the course of daily activity, but which it does not necessarily defend against other animals, is called what?
A. territory B. home range C. foraging space D. nesting site E. family home