Duchenne's muscular dystrophy is characterized by
a. X-chromosomal inheritance.
b. childhood onset.
c. abnormal dystrophin function.
d. All of the above
e. None of the above
Ans: d. All of the above
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The letter "A" from the above figure represents
a. ectoderm. b. endoderm. c. mesoderm. d. neural plate. e. yolk
Early microscopes did not allow clear visualization of cells because they were limited by
A) magnification. B) number of kernels. C) resolution. D) refraction. E) both magnification and resolution.
One gram of hydrogen, which has an atomic mass of 1, would have fewer atoms than 1 gram of carbon that has an atomic mass of 12.
Answer the following statement true (T) or false (F)
Which of the following statements are true or false? If a statement is false, explain why it is false
A. Enzymes lower the free energy released by the reaction that they facilitate. B. Enzymes lower the activation energy for a specific reaction. C. Enzymes increase the probability that any given reactant molecule will be converted to product. D. Enzymes increase the average energy of reactant molecules.