Epigenetics is the study of heritable alterations in gene expression caused by ____
a. mechanisms that do not alter any DNA sequence
b. the mutation of a single gene
c. translocations between alleles
d. environmental factors
e. replication and then improper repair of DNA coding mistakes
a
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Name two examples of lateral gene transfer to eukaryotes that involve cellular organelles
A) Transfer of bacterial genes that were predecessors to mitochondria and chloroplasts. B) Transfer of the bacterial mitochondrial apparatus to form nuclei and ribosomes. C) Transfer of bacterial chloroplasts to form nuclei and ribosomes. D) Transfer of bacterial genes to form nuclei and the mitotic spindle apparatus. E) Transfer of the bacterial spindle apparatus to form ribosomes and transfer RNAs.
Which best describes an artery?
A) Arteries carry blood away from the heart. B) Arteries carry oxygenated blood. C) Arteries contain valves. D) Arteries have thinner walls than veins.
The type of citation format used in Bio-155 is___________
A. Ecology format B. AMA format C. MLA format D. APA format
The lipid layer that forms the foundation of cell membranes is primarily composed of molecules called ________.
A. proteins B. carbohydrates C. fats D. phospholipids