The 4 major bases that make up DNA would be Adenine, Thymine, Guanine and Cytosine. The pyrimidines which are Cytosine and Thymine are structurally similar to each other, as they both only contain a single Carbon containing ring. While Purines, which are Adenine and Guanine, contain 2 chemically bonded carbon containing rings with each other.
As per the base pairing in DNA. Adeline always pairs with Thymine with 2 hydrogen bonds, while Guanine pairs with cytosine with 3 hydrogen bonds.
The base pair that is not found in RNA would be Thymine, instead another pyrimidine, which is uracil is used instead for processes dealing with RNA molecules.
Answer: C) A statement made by Henrietta Lacks’s husband to a magazine
Explanation:An excerpt from The Immortal Life of Henrietta Lacks
"Eventually I tracked down a few magazine articles about her from the seventies. Ebony quoted Henrietta’s husband saying, 'All I remember is that she had this disease, and right after she died they called me in the office wanting to get my permission to take a sample of some kind. I decided not to let them.'"
Biologists use plasmids to join two DNA molecules together.
The summary of this lab is that over time pollution has gotten worse. However, if you attempt to decrease the human impact the bad side effects decrease. For example, the loss of land by erosion in the Sahara Desert is less than present day if you take future development impact. Future development impact can decrease the bad side effects.
Answer: 19 electrons
Explanation: In an Element there are an equal number of protons and electrons. The amount of neutrons may vary though.
