Answer:
Superantigens produce intense immune responses by stimulating lymphocytes to produce cytokines.
Explanation:
Superantigens are a group of bifunctional proteins that interact with at least two receptors expressed on different cells. The superantigen´s receptors in lymphocyte T is located in the same place where the lymphocyte interacts with a conventional antigen, RCT. The capability of these superantigens to join their receptors in many T cells, shoots a series of processes that conduce to cellular activation, differentiation, proliferation, and great production and release of cytokine.
Superantigens constitute the most potent natural immunostimulators known.
Answer:
Cellular respiration continues in the mitochondria of the cell with the <u>Krebs</u> cycle and the electron transport chain.
Explanation:
The Krebs cycle is an important part of the cellular respiration process where —from energetic substrate such as carbohydrates, lipids and eventually proteins— Acetyl-CoA is obtained, whose oxidation produces energy in the form of ATP.
Both cellular respiration and Krebs cycle reactions occur in the mitochondria of the cells of aerobic organisms and, in conjunction with the electron transport chain, have a yield of 24 molecules of ATP for every molecule of glucose entering the system.
The process of converting nitrogen gas to nitrate ions that plants can absorb is
Nitrogen fixation
<u>Multiple choice test questions on theme of codominance and incomplete dominance:</u>
1.Which among the following can be cited as an example of co-dominance?
Check all that apply
(a)Plant height in Mendel’s cross of a tall and short pea plant
(b)Pink roses formed by crossing red and white flowered plants
(c)Hazel eyes
(d)ABO blood grouping in humans
Solution (d)
2.Which among the following can be cited as examples of incomplete dominance?
(a)Roan fur in cattle
(b)Hazel eyes
(c)Pink roses formed by crossing red and white flowered plants
(d)ABO blood grouping in plants
Solution: (b),(c)
3. In co-dominance
(a)Both alleles of a gene are equally represented
(b)One allele is recessive to other
(c)Blending of two alleles results in the formation of a third phenotype
(d) None of the given options
Solution: (a)
The answer is B. Nations meeting to discuss the ozone layer. The keyword in this question is "GLOBAL" which means planet earth. Something that is very important to earth is the ozone layer which blocks out high %'s of radiation. HOPE THIS HELPED :)
