Induced pluripotent stem (iPS) cells ______________________
(a) are created by the expression of a set of key genes in cells derived from adult tissues so that these cells can differentiate into a variety of cell types.
(b) require a supply of donor egg cells, such as embryonic stem cells.
(c) can differentiate into a greater variety of adult tissues than embryonic stem cells.
(d) are created by nuclear transplantation.
Choice (a) is correct. iPS cells do not require donor egg cells [choice (b)] or nuclear transplantation [choice (d)]. Embryonic stem cells can differentiate into all tissue and cell types [choice (c)].
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Consider a tadpole becoming a toad. You would expect to find it changing its form of nitrogenous waste from
A. ammonia to urea. B. urea to ammonia. C. uric acid to urea. D. urea to uric acid. E. uric acid to ammonia.
Which can be absorbed in the large intestine
A. some amino acid B. vitamin k C. vitamin d D. calcium E. bile
DNA that has wrapped around histones and is in a condensed form following interphase is called ________
A) chromatin B) nucleosomes C) karyokinesis D) chromosomes
Chemical energy:
A) is a form of potential energy stored in bonds between molecules. B) contains less energy than kinetic energy. C) is kinetic energy that has not been converted to heat. D) is best described as "the energy of motion." E) is stored energy that is unavailable to do work.