Caudal-fold tuberculin test (CFT): an intradermal infection of 0.1 mL of USDA purified protein derivative (PPD) tuberculin into either side of the caudal fold with reading by visual observation and palpation. The PPD extract is from
A. Mycobacterium tuberculosis
B. mycobacterium bovis
C. mycobacteirum avium subsp. paratuberculosis
D. either mycobacterium tuberculosis or mycobacterium bovis
Ans: B. mycobacterium bovis
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AMP-activated protein kinase (AMPK) is an enzyme that is activated by high levels of AMP in cells. If levels of AMP are high in cells, that means that levels of ATP are low. Once active, AMPK activates catabolic pathways and inhibits anabolic pathways in the cell. Why do you think that is the case? Choose the answer that best explains the role of AMPK.
A. High levels of AMP indicate that there is a high amount of energy stored in the cell, thus activating catabolic pathways and inhibiting anabolic pathways are mechanisms to use stored energy. B. By inhibiting anabolic pathways, AMPK provides a mechanism to generate heat for the cell, which is important if AMP levels are high in the cell. C. By activating catabolic pathways, AMPK provides a mechanism to activate exergonic pathways, which is important if AMP levels are high in the cell. D. Activating catabolic pathways and inhibiting anabolic pathways will ultimately lead to higher consumption of ATP, which is important if AMP levels are high in the cell. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about AMP, ADP, and ATP in cells? What other information is related to the question? Choose Answer Do you have all the information needed to make a determination about the change in free energy? 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?
What is the correct sequence of events during the life cycle of a moss?a. Gametes are produced in the archegonia and antheridia.b. Spores are released.c. The zygote develops within the archegonium.d. The mature sporophyte develops from the gametophyte and produces spores.e. Flagellated sperm swim towards the egg for fertilization.f. Spore germinates into the protonema.
A. f - e - b - d - a - c B. a - b - d - c - b - f C. a - e - c - d - b - f D. a - e - f - d - b - c
In which type of cell would you likely find polysomes?
a. endocrine cells b. oocytes c. sperm d. inactive skin cell e. red blood cells
Fermentation is the conversion of sugar into...
a. alcohol b.acid c.gas d.all of the above e. none of the above