What is a mutation?
A) a change in DNA that leads to death
B) an inherited change in DNA sequences that is the source of all genetic variation
C) an inherited change in a DNA sequence
D) an inherited changed in DNA sequence that is always bad for an organism
E) the source of all genetic variation
Answer: B
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Which of the major tissue types has shortening of cells (i.e., contraction) as its major function?
A. nervous B. muscular C. epithelial D. connective E. All of the choices are correct
It is estimated that 4.6% of SNPs and about 17% of all genes can be defined as pleiotropic. Based on this finding, which of the following should a consumer of genetic information keep in mind?
A) A test identifying a gene for a disease might actually be a test for a different disorder instead. B) Any variant that we gain information about might in the future be found to associate with a more stigmatizing condition. C) A physician might be treating the major condition but not notice even more deleterious outcomes. D) The classification of my genetic disorder might be incorrect. E) Sequencing of the candidate gene might find the wrong expected functional significance.
Viral proteins can damage host cells by which process?
a. producing endotoxins b. preventing transcription of viral nucleic acids c. increasing the rate of fermentation within the host d. causing a decline in coordination and increased irritability e. overwhelming the host cell with a large number of viruses
Kinetochores attach
A) sister chromatids to each other. B) chromatids to spindle microtubules. C) chromosomes to each other. D) chromosomes to ribosomes.