Which of the following is thought to be the major promoter of fatty plaque buildup in the coronary arteries?
What will be an ideal response?
Saturated fats
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Alterations in the ratio of CD4:CD8 lymphocytes are associated with risk of HIV infection progressing to AIDS, of autoimmune diseases, and of progression of some cancers
In searching for predictors of these effects in normal individuals, researchers have found two independent QTLs in the region of the genome known as the major histocompatibility complex (MHC), one in a region regulating CD8 and the other in a region regulating CD4. What does this indicate for the general population? A) Mutation in one or both of these genes causes HIV and AIDS. B) Autoimmune diseases such as type 1 diabetes are caused by one of these genes. C) Variation in linkage disequilibrium with one or both of these mutations may increase the risk of autoimmune disease. D) Only one mutation can be the cause of rheumatoid arthritis. E) The probability of an autoimmune disease demonstrates that additive genes are involved.
Nitrogen fixation by bacteria occurs only in the root nodules of leguminous plants
Indicate whether the statement is true or false
Pathogens can obtain iron from the body using
A) siderophores or transferrin. B) proteases. C) siderophores. D) lipases. E) transferrin.
After one generation of inbreeding, one would expect to see _______ in heterozygotes but no change in _______ frequencies
What will be an ideal response?