Which of the following could be considered an oligotrophic (growing at low nutrient levels) environment inhabited by Alphaproteobacteria? (Check all that apply.)
A. Anaerobic environment
B. Symbiotic growth with another organism
C. Remote marine environments
D. Growth in food items
Answer: C
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Which of the following statements about ubiquitin is TRUE?
A. Ubiquitin recognizes improperly folded proteins. B. Ubiquitin targets proteins for degradation. C. Ubiquitin targets proteins for post-translational processing. D. Ubiquitin recognizes improperly folded proteins and targets them for degradation. E. Ubiquitin targets proteins for degradation and post-translational processing.
The protists are a group that can best be defined as "any eukaryote that is not a plant, animal, or fungus."
Indicate whether the statement is true or false
Suppose a scientist working on a new drug for cancer developed a chemical that irreversibly breaks the hydrogen bonds in the DNA molecules within cancerous cells but leaves all of the covalent bonds intact
Hydrogen bonds are relatively weak compared to covalent bonds, and they are routinely broken and reformed as the DNA molecule is replicated in a normal cell. Their stability is nonetheless critical for maintaining certain aspects of the structure and function of the DNA molecule. Based on this scenario and your knowledge of DNA, how would this newly discovered chemical affect the "molecule of heredity" in a human cancer cell? A) It would break the individual strands of the DNA molecule apart, preventing it from functioning normally. B) It would result in constant DNA replication within the cell. C) It would break the two strands of the DNA molecule apart, preventing it from functioning normally. D) It would allow the DNA molecule to function normally except during replication.
Yeasts form a symbiotic relationship with a bacteria
Indicate whether the statement is true or false