Many oncogenes result from mutations that cause a protein to be expressed in cells where it is normally not expressed or is expressed at inappropriate times during development. This type of mutation can be described as __________
A) amorphic
B) hypomorphic
C) hypermorphic
D) neomorphic
E) dominant negative
C
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Which one of the following is the best definition of diffusion?
A. the tendency of molecules to move in space due to kinetic energy B. the movement of substances from an area of high concentration to an area of low concentration C. the movement of a substance across a membrane D. the movement of a substance by osmosis
For the purposes of conservation, a species is considered __________ in the wild if the only known
members of the species are in captivity. Fill in the blank(s) with the appropriate word(s).
Conjugation, transformation, and transduction are all ways that bacteria
A) reduce their DNA content. B) increase the amount of RNA in the cytoplasm. C) increase their genetic diversity. D) alter their oxygen requirements.
At first glance, it may seem that living systems are able to defy the second law of thermodynamics
However, on closer examination, it becomes clear that although cells create organization from raw materials in the environment, they also contribute to disorder in the environment by releasing _____________. (a) water. (b) radiation. (c) heat. (d) proteins.