Submitted by: Submitted by mwas1
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Category: Other Topics
Date Submitted: 08/14/2013 11:22 PM
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Human biology
Why does a low-fat diet reduce the risk of breast, colon and prostate cancers?
Factors such as great weight gain as an adult and rapid early growth increase the inherent risk of breast cancer. High fat diet comprising of animal fat increases the risk of prostate cancer. Being obese or overweight increases colorectal cancer risk. Researchers have also linked belly fat to colorectal cancer. Low fat diet reduces the risk of all these cancers by assisting in maintaining a healthy weight. Low fat diet, especially fruits and vegetables, contain vitamins, fiber, and minerals. Studies show that some nutrients such as foliate and vitamin E might reduce the risk of cancer. Fiber can protect against colorectal cancer. When fiber interacts with bacteria in the colon, they produce chemicals such as butyrate. These chemicals change the conditions in the colon reducing the likelihood of tumor development. Additionally, fiber increases the stool weight and bowel movements hence there is less time for interaction between the colon and chemicals in the stool. Several lab experiments show that butyrate can stop cancer cell growth and cause them to die off.
Why are X-linked phenotypes more common in males?
Males have only one X chromosome while females have two X chromosomes. This means that an X-linked trait will express itself phenotypically in men. Females will carry the gene in one of the X-chromosome hence it will be recessive.
Explain the meaning of the word Proteomics
Proteomics studies the complete complement of proteins. This includes the adjustments made to some proteins, manufactured by a cellular system or an organism. It assists in understanding the cellular processes.
Define “Ex Vivo Gene Therapy”
It is a therapy in which modification of genes or cells takes place outside the body of a genetic disease patient, before reintroduction into the body.