Answer:
The question is incomplete.
However, I notice that your question is mainly dealing with
"Nucleotides with a single ring structure"
I tackled that part, also providing explanation to the point you focused on.
Explanation:
Nucleotides are compounds in which nitrogenous bases (purines and pyrimidines) are conjugated to the pentose sugars (ribose or deoxyribose) and at least one phosphate group. Thus a nucleotide consists of a nitrogenous base, pentose sugar and at least one phosphate group.
Examples of the nitrogenous bases are Adenine, Guanine, Thymine, Uracil and Cytosine. Of all, Thymine, Uracil and Cytosine are with single ring, while Adenine and Guanine are double ring structure.
Studies of populations that reveal correlations between dietary habits and disease incidence are epidemiological studies.
If the bacteria has a capsule, it's more likely to be able to spread or cause a disease. The capsule greatens the chance, as its function is to protect the bacteria, as well as to keep it thriving and alive.
1. Sustainable 2. Environmental
I believe the structure organelle that may be faulty is Mitochondria. Mitochondria is a cellular organelle that is involved in cellular respiration a process that uses glucose to yield water and carbon dioxide coupled with production of energy in the form of ATP. Melas meaning mitochondrial encephalomyopathy lactic acidosis and stroke-like episodes is a conditions that affects body systems especially the brain and the nervous system and muscles.
