Answer: A. walk up 4 flights of stairs
Explanation:
An old person can no longer walk 4 flights of stairs because the joints on their legs can no longer handle that amount of stress .
When one gets older they start to develop many chronic diseases such as high blood pressure , joint pains and these diseases will spike up if they were to expose themselves in such a stressful situation where they have to walk that far and that in a steep level.
The single-stranded genomic DNA, the SDS, and the cellular waste are precipitated in a high-salt environment that is created by the potassium ion from the potassium acetate.
After centrifugation, the supernatant will still contain your plasmid DNA. Plant DNA has frequently been extracted using the potassium acetate method.
It has been suggested in situations when several markers need to be evaluated on the same samples since it generates enough DNA to test a high number of markers. Typically, laboratory procedures call for the use of potassium acetate.
In molecular biology applications, potassium acetate precipitates sodium dodecyl sulfate (SDS) and SDS-bound proteins to enable their removal from DNA. It may also be employed as a salt for the ethanol precipitation of DNA.
To learn more about potassium acetate
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This paper presents findings about the riskiest factors faced by drivers as informed through the first large-scale, crash-only analysis of naturalistic driving data. Results indicate that many secondary tasks or activities, particularly resulting from the use of handheld electronic devices, are of detriment to driver safety.
Answer: The Four Noble Truths comprise the essence of Buddha's teachings, though they leave much left unexplained. They are the truth of suffering, the truth of the cause of suffering, the truth of the end of suffering, and the truth of the path that leads to the end of suffering.
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