Four of the five answers listed below are bound by membranes. Select the exception.
a. mitochondria
b. ribosome
c. peroxisome
d. nucleus
e. lysosome
Answer: b. ribosome
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Identifying proteases being essential for replication of a virus would suggest the virus
A) lyses its host following genome replication. B) contains at least one polyprotein. C) has a single-stranded RNA genome. D) uses at least one set of overlapping genes.
Your textbook, and many (but not all) paleoanthropologists, refer to a species more closely related to humans than to chimps as a(n) ________
Fill in the blank(s) with correct word
Intertidal mud flats in tropical regions are typically composed of
A) salt marshes. B) peatlands. C) mangrove forests or mangals. D) oysterbeds.
When a small amount of hydrochloric acid (HCl) is added to a solution of Na2HPO4, the pH of the solution does not
change markedly. The pH also does not change drastically when a small amount of sodium hydroxide (NaOH) is added to this same solution. Based on these observations, the compound Na2HPO4 is: a. acting as a buffer. b. acting as a solvent. c. able to donate hydrogen atoms to HCl. d. able to remove hydrogen ions from the OH? of NaOH. e. an enzyme facilitating the reaction between HCl and NaOH.