Answer the following questions true (T) or false (F)
1. Generally, purines and pyrimidines are not synthesized de novo but rather obtained through salvage pathways to recycle them from food because de novo synthesis has a high energy cost.
2. Usually, a single biochemical test is all that is needed to identify an unknown microbial sample.
3. Chronic diseases have a rapid onset and progression.
1. TRUE
2. FALSE
3. FALSE
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Animals such as humans would be classified as:
A. photoautotrophs. B. photoheterotrophs. C. chemoautotrophs. D. chemoheterotrophs.
Viruses travel through animals mainly by lysing cells and then spreading to other cells. Plant cells are not easily lysed. If a pathogen enters a plant cell and does not initiate a hypersensitive response, what is the most likely way the virus would spread to other plant cells?
A. Through the chloroplasts. B. Directly through the cell wall. C. Through the central vacuole. D. Through the plasmodesmata. E. Through transport vesicles. 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 how plant viruses spread between cells? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? 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?
A flock of flamingos wading and feeding in a lake is an example of a(n) __________
a. organism b. population c. community d. ecosystem
Galactosemia is a disease caused by a genetic defect that affects an individual's ability to correctly metabolize galactose for use in the glycolytic pathway, but has no effect on metabolism of starch and glycogen, or on glycolysis
Galactosemia results in high galactose levels in the blood and accumulation of galactose-1-phosphate in the tissues. a) If you were a physician treating a person with this genetic disorder, in addition to galactose, what other dietary sugar would you recommend the patient not consume to avoid high galactose levels in the blood? b) Why would infants be more likely than adults to have high blood galactose levels associated with galactosemia? c) Suggest a reason for the observation that galactosemia is more common than fructosemia? d) Propose possible candidates for the defective enzyme that causes galactosemia. What will be an ideal response?