Answer:
The nitrogenous bases of DNA are categorized into two types depending on their structure: Pyrimidines which contains a six-membered ring-like cytosine, thymine and uracil and purines which contains six members rings attached to a five-membered ring like in guanine and adenine.
The base pairing in DNA double-helical structure always takes place between purine and pyrimidines as:
1. The pairing between the purines and pyrimidines results in uniform diameter between two strands which provides stability to the ladder-like the structure of DNA.
2. The chemical side groups attached to the nitrogenous bases allow the formation of hydrogen bonds between purine and pyrimidines.
Therefore, A always binds T through two hydrogen bonds and G always bind C through three hydrogen bonds.
<u>Stem cell </u>research has the potential to significantly impact the development of disease-modifying treatments for Parkinson’s disease with considerable progress made in creating dopamine-progressing cells.
Explanation:
Parkinson’s disease, a neurodegenerative disease, leads to reduction of dopamine (a neurochemical messenger which carries messages involving thinking and body movements to brain) in the body because the disease will target and kill dopamine-producing nerve cells (neurons). This leads to loss of movement and thinking abilities which are activated by dopamine.
Stem cells research is done to study about the prospects of stem cells in stem cell therapy for Parkinson’s patients as a viable source of new dopamine nerve cells. Research has been involved in growing stem cells to replace or regenerate dopamine-producing nerve cells by using embryonic stem cells or induced pluripotent stem cells as a treatment modality in Parkinson’s disease.
Answer:
c) It provides support to the plant
Answer:
Intelligent Design
Some scientists who are Christians have developed a theory called Intelligent Design to explain the creation and development of life on earth.
However, in my opinion its complete nonsense
Answer:
Lister’s experiments showed that reducing germs during surgery prevented infection.
Explanation:
Just did it on Edge