The antigen-binding sites of an antibody molecule are formed from the molecule's variable regions which are described as so because their amino acid sequences can be different on different antibodies.
The specificity of antibodies is determined by the variable regions found at their endpoints. Antibodies are specialized proteins secreted by B-cells of the immune system. They are also called immunoglobulins. They contain four polypeptide chains that comprise two heavy chains and two light chains to form a Y-shaped molecule.
The variable regions, more specifically the hypervariable regions of an antibody, have a high ratio of different amino acids with the most common amino acids provided in one place. The variable region serves as the antigen-binding site while the constant region found below the variable region is determined to invade the antigen.
Antibodies are preserved in our body to identify the antigen the next time it encounters. They send the signals to the other body parts to reject the antigen and invade it.
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Answer:
There is no short answer.
Explanation:
The chlorophyll is the pigment that gives the plants' leaves their green colors and it is also responsible for the photosynthesis process which takes place in the mitochondria. In the fall as the leaves change color, the amount of chlorophyll decreases and this impacts the mitochondria as it also decreases the amount of work the mitochondria does.
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According to http://www.ucsusa.org/global_warming/science_and_impacts/science/ozone-hole-and-gw-faq.html#.WQjhDfW...
I think the answer is B.CFC
Answer:
A. Physical environment , lifestyle, and diet
Explanation:
Physical environment because diseases like athletes foot are caused by Physical environment. Lifestyle because diseases like atherosclerosis and heart disease are caused by lifestyle. Diet because diabetes, obesity, and osteoporosis are caused by diet.
Answer: existence of a particular species is completely wiped out from the planet
Explanation: Extinction means that the existence of a particular species is completely wiped out from the planet. It is an irreversible form of damage, since neither a single male and female species member is present to procreate. Endangered, on the other hand, means that a species is nearing extinction.
