Which of the following is TRUE about cloning?
a) cloning specifically refers to creation of new individuals with the exact genome as a donor individual
b) Hans Spemann successfully cloned the first animal in 1938
c) the only successfully cloned animals have been sheep
d) cloning refers to a variety of techniques, ranging from whole organism cloning to tissue and organ cloning
e) scientists have successfully cloned a dinosaur from DNA fragments found in preserved fossils
Ans: d) cloning refers to a variety of techniques, ranging from whole organism cloning to tissue and organ cloning
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All enzymes act by
a. breaking hydrogen bonds between molecules. b. lowering the activation energy of specific chemical reactions. c. breaking and forming ionic bonds between ions. d. allowing products to be changed during the chemical reactions. e. raising the activation energy of specific chemical reactions.
By definition, a nerve is
a. a bundle of sensory, motor, or both types of nerve fibers outside the central nervous system. b. a single extension of a neuron. c. the same as a neuron but within the central nervous system. d. a collection of nerve cell bodies outside the central nervous system. e. a fiber more than ten inches in length.
Which of the following will increase the unloading of oxygen within the tissue?
A) increased hydrogen ion concentration only B) increased PCO2 only C) increased body temperature only D) both increased hydrogen ion concentration and increased body temperature E) increased hydrogen ion concentration, increased body temperature, and increased PCO2
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 exit the Golgi, but instead be targeted to the cytoplasm. B. The protein would continue on to the cell surface. C. The protein would be stuck in the Golgi. D. The protein would return to the endoplasmic reticulum via the trans face of the Golgi.