Gel electrophoresis separates the DNA fragments
according to
a. their length.
b. their mass.
c. their speed of travel through the gel.
d. the number of nucleotides in the fragment.
e. all of these.
Answer: e
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Answer the following statements true (T) or false (F)
1.The hypothalamus is both part of the central nervous system and part of the endocrine system. 2.ADH has roles in both homeostatic control of water in the blood and in connecting sexual and social behavior. 3.ADH receptors in an appropriate part of the brain lead to rewards, which enhance social behavior in voles. 4.Researchers Pitkow and Young observed altered kidney function and social behavior in voles with extra ADH. 5.Seasonal affective disorder can be treated with supplemental lighting.
Eluviation refers to the leaching of minerals and finer soil particles from the upper layers to the lower layers of soil
Indicate whether the statement is true or false
Totipotent human stem cells can apparently be obtained only from:a
bone marrow. b. umbilical cords. c. cancer patients. d. zygotes. e. gametes
Which of the following is/are TRUE when describing cholecystokinin (CCK)?
a. CCK secretion is induced by absorption of fatty acids in the intestine b. CCK stimulates the vagus nerve, and induces satiety signals c. CCK inhibits feeding behavior d. all of the above e. b and c