Epigenetics refers to a special kind of hereditary mechanism. epigenetic changes do not change the dna nucleotide sequence, yet their effect on gene expression can last for several generations. in one surprising study, it was found that the grandsons of men who suffered a famine were less likely to die of cardiovascular disease. the experience of famine made some cardio-protective change in the sperm of those grandfathers that was passed on. what type of change was likely responsible?

a. histone acetylation or dna methylation
b. phosphatase levels
c. ubiquitin tagging

The type of change that was responsible was “histone acetylation or DNA methylation”.

Explanation:

clinically, some people often have repeated allergies, eczema and respiratory infections or other parts of the infection, in this case, in addition to some routine tests such as tests for white blood cells, immunoglobulin series, lymphocyte subsets, etc., the five immune immunoglobulin tests are also necessary.

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.