Subsidiary cells are the only epidermal cells that have chloroplasts. Indicate whether the statement is true or false
False - Guard
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Adding a phosphate or sugar group to a newly made protein is an example of ________
A) a posttranscriptional modification B) a pretranscriptional modification C) an intron removal D) gene silencing E) a posttranslational modification
Marion is going to the hospital for a triple bypass operation. She will have general anesthesia, intravenous catheter, surgical wounds, and a urinary catheter. Which health-care-associated infection is she at greatest risk for contracting?
A. surgical site B. urinary tract C. meningitis D. respiratory E. septicemia
Can two different species that are members of the same clade have more than one common ancestor? Choose the MOST correct answer and explanation.
A. Yes. Although two species in the same clade have only one most recent common ancestor, they also have a number of older common ancestors that occurred earlier in their evolutionary history. B. Maybe. Two species in the same clade can have more than one common ancestor only in cases where horizontal gene transfer from a third, previously unrelated, species has occurred. C. Yes. Two species of the same clade always have eight common ancestors, matching the number of levels higher than species in the taxonomic hierarchy. D. Maybe. If they are members of a paraphyletic clade, they can have more than one common ancestor. E. No. Because they are members of a clade, by definition they can have only one common ancestor.
Each condensed chromosome contains a kinetochore within its centromere; kinetochores function _____.
A) to form the binding site, which keeps the sister chromatids together B) as spools on which the DNA can wind C) as chaperone proteins that organizes the multiple levels of coiling in mitotic chromosomes D) as a docking site for the microtubules that will help separate the chromatids E) as decondensing proteins that facilitate uncoiling once the nuclear division is complete