Answer:
Explanation:
Nonspecific defenses include physical and chemical barriers, the inflammatory response, and interferons. Physical barriers include the intact skin and mucous membranes. ... An example of such a substance is lysozyme, an enzyme present in tears that destroys the cell membranes of certain bacteria.
The type of mutation in which a segment of a chromosome breaks off and reattaches in the reverse direction (backwards). The type of mutation that results in a different amino acid being coded for. ... This is a source of genetic variation that involves the swapping of sections of chromosomes during meiosis.
Nucleus
The difference between isotopes is the number of neutrons in the nucleus, to be more specific.
Answer:
Carbon-14 in photosynthesis and Florbetapir (18F) in PIB of Alzheimer's disease.
Explanation:
These radioactive isotopes known as the biological spies as they tell or mark the presence or activity of a particular atom to the scientists in living beings.
For instance,
1. the process of photosynthesis can be understood by observing the radioactive isotope Carbon-14 from taking the carbon dioxide to the generation of glucose molecule by molecule process.
2. A protein that is deposited in people with Alzheimer's disease, called beta-amyloid. It is bind with another protein known as PIB, which contains Florbetapir (18F) a radioactive isotope. It gives an idea about the location of PIB and deposits in amyloid to try to eliminate the protein deposits and check the effect of medication.
