Answer:
<em>The correct option is C.</em>
Explanation:
The structure mentioned in the question is cell membrane. The cell membrane can be described as a semi-permeable membrane which regulates the export and import of particles across the cell membrane. Some molecules move inside the cell along the concentration gradient by passive transport while other molecules move inside through active transport i.e against the concentration gradient.
The cell membrane is made up of phosphate head and fatty acid tails.
I. treating the substance with nucleases that destroy all nucleic acids and then determining whether it is still infectious
Explanation:
Analysis of the nature of the specimen like the infectious agents (bacterium, virus, viriod, or prion) is very important to diagnose the diseases caused by them, investigate disease outbreak, to determine the clinical course of the infectious disease etc.
There are many methods like direct detection, cultivation assays, serological assays to detect the pathogen type.
Molecular techniques like polymerase chain reaction (PCR) is done to further analyze or investigate the pathogen, like its microbial genome, the virulence factor etc. These are amplification methods which help to investigate the pathogenesis and disease progression. PCR method involves denaturing the DNA polymerase which is a nuclease type of enzyme. Nucleases are present with exonucleases and endonucleases, both of which acts at specific points on the DNA of the pathogen and will create new templates .
Human activities contribute to climate change by causing changes in Earth's atmosphere in the amounts of greenhouse gases, aerosols (small particles), and cloudiness. The largest known contribution comes from the burning of fossil fuels, which releases carbon dioxide gas to the atmosphere.
The graph is showing us the tide height in feet in the left side and the hight up and down.
