Describe how an epigenetic trait differs from a mutated trait. What will be an ideal response?
ANSWER: An epigenetic trait is a stable phenotype that results from changes in gene expression
involving chemical modification of DNA bases or the histone proteins associated with them.
Unlike mutations, which involve a change in the DNA sequence, epigenetic modifications do
not change the nucleotide sequence, but they do affect how genes behave.
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In the figure above, which number would designate the arctic tundra biome?
A) 2 B) 3 C) 4 D) 5 E) The arctic tundra is not designated by a number in the figure above.
In the first step of signal transduction, what is the trigger for the cellular response?
a. target protein b. kinase c. ligand d. second messenger e. effector
What happens when living R strain Streptococcus pneumoniae bacteria are mixed with heat-killed S strain
Streptococcus pneumoniae bacteria?
a. The S strain bacteria come back to life. b. The R strain bacteria are killed, and the S strain bacteria remain dead. c. The R strain bacteria are transformed into S strain bacteria. d. The S strain bacteria are transformed into R strain bacteria. e. The R strain bacteria are killed, and the S strain bacteria come back to life.
Specimen collection
A. does not require special handling. B. must be done under sterile conditions. C. is always done by a medical professional. D. must utilize aseptic techniques.