If the pH gradient in a two-dimensional gel is lost, which step during two-dimensional electrophoresis would be affected?
What will be an ideal response?
isoelectric focusing (first dimension)
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Scientists use the term "theory" when discussing the theory of gravity because ________
a. it is better to be vague than to be proven wrong b. they anticipate finding locations where things fall up c. not all scientists are convinced about the reality of gravity d. a theory is the term used to describe a hypothesis that is very thoroughly tested
Which of the following statements regarding the gall bladder is not true?
1.Its primary role is to store bile.
2.Following its removal, individuals do not make bile.
3.Its removal has few significant effects.
4.It receives bile from the liver.
Given that an unknown atom's mass number (AMU) is 27, its combination of particles could be
A. 27 electrons, 16 neutrons, 16 protons. B. 27 neutrons, 27 protons, 27 electrons. C. 15 neutrons, 12 electrons, 15 protons. D. 16 electrons, 11 neutrons, 16 protons.
Why is baker's yeast useful for expressing genetically engineered genes?
a. The yeast cells are best suited for making human products for medical use. b. Yeast cells are eukaryotic and so would likely be successful in expressing eukaryotic genes. c. Many inducible promoters from the yeast genome have been cloned, such as the lac operon. d. The yeast cells do not secrete their protein products.