T cell receptors
a. are cell surface receptors integrated into the cytoplasmic membrane of T cells.
b. bind foreign peptides in the context of MHC.
c. are composed of an alpha and beta chain.
d. exhibit all of the properties listed above.
Answer: D
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Answer the following statements true (T) or false (F)
1. Homologous chromosomes are identical copies of each other. 2. Mitotic cell division is never used by organisms as a means of reproduction. 3. A diploid queen honeybee produce eggs by meiosis. Some of these eggs are never fertilized, while the rest are. These unfertilized eggs develop into haploid male honeybee. This can be an example of sexual reproduction. 4. For any given species, cells in metaphase II of meiosis would contain 2X more genetic material than cells in metaphase of mitosis. 5. The karyotype of a normal human male would show a total of 23 pairs of homologous chromosomes.
How do the characteristics of life apply to situations such as individuals on life support, organs on life support, frozen organisms (including embryos), genetically engineered organisms, test tube babies, and hybrids between computers and living things?
What will be an ideal response?
You should have your appendix removed whenever possible.
a. true b. false
Which event occurs in lung blood?
a. Plasma HCO3- enters erythrocytes. b. In erythrocytes, carbonic anhydrase converts CO2 and H2O into HCO3- and H+. c. Free H+ binds to hemoglobin. d. CO2 binds to hemoglobin.