With the exception of certain viruses, DNA rather than RNA carries the hereditary genetic code in all biological life on Earth. DNA is both more resilient and more easily repaired than RNA. As a result, DNA serves as a more stable carrier of the genetic information that is essential to survival and reproduction.
Q. What are the 3 species concepts?
The answer to these questions depends on one’s species concept. The concept of species is an important but difficult one in biology, and is sometimes referred to the “species problem”. Some major species concepts are: Typological (or Essentialist, Morphological, Phenetic) species concept.
Table of Contents
- Q. What are the 3 species concepts?
- Q. What is this biological concept?
- Q. What makes DNA a good genetic material?
- Q. Is thymine more stable than uracil?
- Q. Who proved that DNA is basic genetic material?
- Q. Why is RNA more important than DNA?
- Q. Is RNA part of DNA?
- Q. How close is human DNA to bananas?
- Q. How much DNA do we share with lettuce?
Q. What is this biological concept?
The biological species concept gives an explanation of how species form (speciation). A biological species is a group of individuals that can breed together (panmixia). However, they cannot breed with other groups. “The words ‘reproductively isolated’ are the key words of the biological species definition”.
- It must be stable.
- It must be capable of being expressed when needed.
- It must be capable of accurate replication.
- It must be transmitted from parent to progeny without change.
Q. What makes DNA a good genetic material?
Q. Is thymine more stable than uracil?
Uracil is less chemically stable than thymine. Deamination of cytosine converts it to uracil. The reason uracil is not in DNA is (likely) so that the repair systems can recognize a uracil as the result of a cytosine deamination and repair it accordingly.
Q. Who proved that DNA is basic genetic material?
Alfred Hershey
Q. Why is RNA more important than DNA?
Due to its deoxyribose sugar, which contains one less oxygen-containing hydroxyl group, DNA is a more stable molecule than RNA, which is useful for a molecule which has the task of keeping genetic information safe. RNA, containing a ribose sugar, is more reactive than DNA and is not stable in alkaline conditions.
Q. Is RNA part of DNA?
The portions of DNA that are transcribed into RNA are called “genes”. RNA is very similar to DNA. It resembles a long chain, with the links in the chain made up of individual nucleotides. As in DNA, in RNA one finds adenine (A), cytosine (C), and guanine (G).
Q. How close is human DNA to bananas?
About 60 percent of our genes have a recognizable counterpart in the banana genome! “Of those 60 percent, the proteins encoded by them are roughly 40 percent identical when we compare the amino acid sequence of the human protein to its equivalent in the banana,” Brody adds.
Q. How much DNA do we share with lettuce?
More startling is an even newer discovery: we share 99% of our DNA with lettuce.
