Stanley Miller constructed an apparatus containing water vapor, hydrogen gas, methane, and ammonia and energized it with electricity in a model of the atmosphere of early Earth. The apparatus produced all of the following choices except ________
a. living cells
b. sugars
c. amino acids
d. organic compounds
a
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Canine phosphofructokinase (PFK) deficiency afflicts Springer spaniels, affecting an estimated 10% of the breed. Given its critical role in glycolysis, one implication of the genetic defect resulting in PFK deficiency in dogs is _____
A) early embryonic mortality B) elevated blood-glucose levels in the dog's blood C) an intolerance for exercise D) a reduced life span
Alcohol consumption adversely affects the synthesis of molecules involved in protein degradation, which can eventually lead to liver damage. Given this information, which organelle in liver cells is most directly affected by alcohol consumption?
A. Golgi apparatus B. Nucleus C. Lysosome D. Rough endoplasmic reticulum 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 know about where lysosome proteins are made? 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?
Fatal familial insomnia(FFI) is a very rare prion disease of the brain. FFI has no known cure and involves progressively worsening insomnia, which eventually leads to hallucinations, delirium, and dementia-like symptoms. The average age of diagnosis is about 40 years of age and the average life span after diagnosis is 18 months. FFI is not caused by an infection, but is inherited in an autosomal dominant fashion. Knowing its inheritance pattern AND knowing it is a prion disease, which of the following is accurate?
A. Individuals with FFI have inherited a gene that encodes a mutant form of a prion protein that folds abnormally. B. The abnormal prion protein gradually converts the normal prion proteins of the brain into abnormal prion proteins. C. The abnormal proteins do not get degraded and they form aggregates in brain cells. D. An individual who inherits one copy of the mutant allele will show the FFI phenotype. E. All of these are correct.
As bones age in older persons, they
a. have increased calcium deposits. b. become stronger. c. are less porous. d. are more brittle. e. increase in length.