Steroid hormones
a. are proteins.
b. include testosterone, estrogens, and cortisol.
c. never activate second messengers.
d. never alter membrane transport of ions.
e. fit all of these descriptions.
Answer: b
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Investigators have found a new species bacteria that lives under both aerobic and anaerobic conditions. They hypothesize that different genes are expressed in each condition. What experiment could test this hypothesis and identify important genes?
A. Completely sequence the genome of the bacteria in both aerobic and anaerobic conditions B. Collect mRNA from both anaerobic and aerobic conditions and generate two cDNA libraries C. Measure levels of RNA Polymerase in both conditions D. Design primers to a specific region of the genome and sequence this region during both anaerobic and aerobic conditions Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about gene expression? transcriptional. Consider Possibilities · Consider the different answer options. Which can you rule out? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The pentose phosphate pathway is the major glycolytic pathway used by archaea.
Answer the following statement true (T) or false (F)
Which of the following is NOT a single gene
trait?
a. cleft chin b. attached earlobes c. dimples d. red hair e. brown skin
Which of the following cytokines act as a signal between leukocytes?
A) growth factors B) interferons C) interleukins D) tumor necrosis factors E) chemokines