Which of the following might complicate the interpretation of ChIP-Seq data?
A. Because histones can be moved around or ejected from the chromatin, some DNA might not be sequenced if it is not wrapped around a histone
B. DNA wrapped around nucleosomes can never be sequenced
C. The regions of DNA wrapped around a histone is too long to be sequenced with current technologies
D. The DNA between nucleosomes are too compacted to be sequenced
A
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In an experiment described in a chemistry lab book, the directions state that after mixing two chemicals (A and B) and waiting 5 minutes that A will be oxidized. This means that:
A. chemical A has lost electrons to chemical B. B. chemical A has gained electrons from chemical B. C. chemical A has gained energy in the form of heat from chemical B. D. chemical A has lost energy in the form of heat to chemical B. E. chemical A has reacted with oxygen.
Answer the following statements true (T) or false (F)
1. Lactoferrin and transferrin are proteins that bind iron, and therefore deprive pathogens of this essential nutrient. 2. Pyrogenic substances cause the production of pus. 3. Interferons are virus-specific, but are not species-specific. 4. Complement is the name of a single plasma protein that “complements” the actions of the immune system. 5. Eosinophils are much better phagocytes than neutrophils.
Which of the following methods could be used to differentiate between a member of domain Bacteria and a member of domain Archaea?
a. You could look for the presence of mitochondria. b. You could see if the organism produces rRNA. c. You could see if the organism can survive in an extreme environment. d. You could look for the presence of peptidoglycan. e. All of the above would work. f. None of the above would work.
Most polyploid species arise from
A) a single diploid parent plant. B) a single triploid parent plant. C) a single tetraploid parent plant. D) the hybridization of two parent species.