1)Chargaff's rules state that DNA from any cell of any organisms should have a 1:1 ratio of pyrimidine and purine bases and, more specifically, that the amount of guanine should be equal to cytosine and the amount of adenine should be equal to thymine. This pattern is found in both strands of the DNA.
2)DNA structure
DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C). The order of these bases is what determines DNA's instructions, or genetic code.
3)A nucleotide consists of three things: A nitrogenous base, which can be either adenine, guanine, cytosine, or thymine (in the case of RNA, thymine is replaced by uracil). A five-carbon sugar, called deoxyribose because it is lacking an oxygen group on one of its carbons. One or more phosphate groups.
4)DNA replication is said to be semi-conservative because of this process of replication, where the resulting double helix is composed of both an old strand and a new strand. ... Semiconservative replication would produce two copies that each contained one of the original strands and one new strand.
5)The diagram has show in above.
6)complementary base pairing is necessary because the double helix shape would not be the same if not. Doubles would only pair with doubles and the singles to singles.
<u>HOPE</u><u> </u><u>THIS</u><u> </u><u>HELPS</u><u> </u><u>YOU</u><u>.</u>
Answer:
The four seasons happen because of the tilt of the Earth's axis. At different times of the year, the sun's rays hit different parts of the globe more directly. The angle of the Earth's axis tilts the Northern Hemisphere towards the sun during the summer.
Explanation:
The kind of knowledge that Rhonda used in the situation above is TACIT KNOWLEDGE. Tacit knowledge is not learned, it an inborn type of knowledge that helps one to understand and relate with other people as needed. Tacit knowledge usually have its foundation in one's belief, culture, value, mental models, skills, etc.
Answer:
Sample A
T= 21.3% and A= 21.3%
G=28.7% and C= 28.7%
SAMPLE B
T=28.7% and A= 28.7%
G= 21.3% and C= 21.3%
Sample A would have higher melting temperature
Explanation:
According to given information, sample A contains 21.3% thymine.
Percentage of adenine in sample A= 21.3% (Since adenine base pairs with thymine, so, adenine and thymine are present in equal amount in a double stranded DNA)
Total of A+T in sample A= 21.3 + 21.3 = 42.6%
G+ C content of sample A= 100-42.6= 57.4%
Percent G content of sample A = 57.4/2 = 28.7%
Percent C content of sample A = 28.7%
SAMPLE B:
According to the given information, sample B contains 28.7% thymine.
Therefore, percent of Adenine base in sample B= 28.7%
Total of A+T content in sample B= 28.7 + 28.7 = 57.4%
G + C content of the sample B = 100-57.4= 42.6%
Percent G content of the sample B= 42.6/2= 21.3%
Percent C content of sample B = 21.3%
There are three hydrogen bonds between a GC pair while there are only two hydrogen bonds between AT pair. The DNA content with higher GC content has higher melting temperature. Therefore, sample A would have higher melting temperature.
Answer:
E.coli is a bacterium which is preffered for transformation due to its rapid growth and high efficiency of introduction of DNA molecules into cells.
Tetracycline is an antibiotic used to treat several infections such as cholera, plague, brucellosis, and malaria etcetra.
Plasmid is a small, extrachromosomal DNA molecule present in cell which is seprated from chromosomal DNA and have ability to replicate independently.
When a plasmid resistant to tetracycline and kanamycine is inserted into E.coli, the process is called transformation. E.coli might not be able to survive due to absence of plasmid but the transformed strains having antibiotic tetracycline and kanamycine will probably be able to survive it.
Hence, the culture of bacteria carrying plasmid will be able to survive only.
