Answer:
See the answer below
Explanation:
Enzymes are biological catalysts and are quite temperature specific. They operate optimally within a certain range of temperature. At lower temperatures, their activities decrease and they become inactive at extremely low temperatures. At higher temperatures, their activities are initially promoted but as temperatures get higher, their activities become zero due to the fact that they become denatured.
A. <em>The optimum temperature for amylase activity is 37</em>
<em>, hence, when the student had the first test tube at this temperature, the rate of reaction of the enzyme is optimal. The maximum amount of starch would be broken down into maltose.</em>
B.<em> At 0 degrees, the enzyme would become inactive and the rate of reaction becomes minimal or even zero due to the inactivity of the enzyme. At 60 degrees, the rate of reaction also becomes zero because the enzyme would have been denatured by the high temperature.</em>
Answer:
The answer is D) Another biopsy from a distinct site may show a different result.
Explanation:
In molecular biology southern blot is used to detect a specific sequence of DNA. Mitochondria are energy producing organelles in the cell and they possess DNA that is inherited only from the mother. Although Southern blot is the classic method used to detect large deletions in mitochondrial DNA, it is not always sensitive enough to detect heteroplasmic deletions at low levels leading to results that are not always reliable. Heteroplasmy refers to the presence of more than one mitochondrial DNA in an individual. The presence of a mutation in the mitochondrial DNA can create an intracellular heteroplasmic mix of mutant and normal mitochondrial DNA. Cells with a higher rate of cell division like blood can yield inconclusive results in southern analysis because heteroplasmy favors wild type mitochondrial DNA. Thus, non-dividing cells such as muscle cells are preferred for the analysis.
The human need for fresh water can be met through recycling of used water and New Conservation Technologies while avoiding or reducing environmental impact.
<h3>What is freshwater?</h3>
Fresh water is defined as the type of water that contains low levels of dissolved salt which is suitable for human consumption.
There is great need of fresh water for human use because of the following:
- Drinking and Household Needs,
- Recreation.
- Industry and Commerce.
To meets the need for fresh water for human consumption without affecting the environment negatively the following can be done:
- Recycling of used water through filtering and treatment processes.
- The use of water conservation technologies such as rain sensors.
Learn more about water conservation here:
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