The nitrogenous bases placed in between the DNA double helix strands, like rungs on a ladder, are positioned there because of the hydrophobic effect and are stabilized by hydrogen bonding. The stability of DNA also relies on the interactions between the hydrogen bonds between bases, hydrogen bonds between bases and surrounding water, and base interaction between neighboring bases.
Hydrogen bonds are able to stabilize the DNA double helix by pairing up with their complementary base pairs (guanine with cytosine and adenine with thymine)
Hope this was able to help you! I went through my answer and bolded the more important parts, and parts more useful for answering the question.
<span>the answer will have to be the second choice cause it seems more correct</span>
Answer:
C...
Vitamin D-- Lack of sunlight--Brittle bones(rickets)
B...
Iron ---- Lack of sunlight, fish and eggs --- Anaemia
Answer:
The main disadvantage of inorganic fertilizers is that it costs much higher than the organic fertilizers. So, if someone is using fertilizers in bulk, organic fertilizers are much more cost effective.
Explanation:
Answer:
The correct answer is - the biofilm.
Explanation:
Biofilms are a type of one or more than one type of microbes that grow on many different surfaces, These microbes include fungi, bacteria, and protist that develop attached to the surface and one another and embedded in a self-produced matrix.
It is a thick film of protein such as fibrin, polysaccharides such as alginate or eDNA secreted by the bacteria, and other microbes that cover the teeth surface.
