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Question
Hello, Dev.I want to ask again some question.



1.mRNA is complementary sense strand to
DNA-Briefly described?
2.Three difference between Simple
microscope & compound microscope?
3.Adenine always pair with Thymine -why?

Thanks in advance.

Answer
mRNA is complementary sense strand to DNA

http://www.sci.sdsu.edu/~smaloy/MicrobialGenetics/topics/chroms-genes-prots/temp

http://www.nature.com/scitable/topicpage/Translation-DNA-to-mRNA-to-Protein-393

Three difference between Simple
microscope & compound microscope

http://hdimage4u.blogspot.com/2012/10/difference-between-compound-microscope.htm


The difference is a simple microscope has one lens where a compound microscope has an objective lens and an eyepiece with a longer focal length.the difference lies in the number of lenses that each microscope has. A compound microscope has 2 or more lenses, like those found in most science classrooms. A simple microscope uses only 1 lens.they differ in the number of lens that they use. They are both forms of light microscopes, but a simple microscope uses one lens, and a compound microscope uses multiple…A compound microscope consists of several lenses operating together, whereas a simple microscope is one lens, like a magnifying glass. A compound microscope gives higher magnification and also better resolution than a simple microscope.

.Adenine always pair with Thymine -why?

http://dictionary.reference.com/browse/adenine?s=t

e survival of an organism. This set of instructions are encoded in a double-helix stranded structure composed of nucleotide monomers. Each nucleotide carries a phosphate group, a five-carbon sugar called a deoxyribose and one of four nucleobases. The four nitrogen-containing bases found in DNA are A, T, C and G. A and G are classified as "purines," while C and T are considered as "pyrimidines." Purines are bigger in size compared to pyrimidines.

An important discovery regarding the structure of DNA was made by Edwin Chargaff in 1949. In one of his experiments, Chargaff illustrated that the quantity of A is equal to that of T, while the quantity of C is equal to that of G. He then concluded that the complementary base of A must be T and the complementary base of C must be G. Chargaff's findings formed the basis for the base pairing principle of DNA.The DNA molecule looks like a twisted ladder with a backbone made of alternating sugar and phosphate molecules and rungs made of the nucleotide bases adenine, thymine, cytosine and guanine. The structure of DNA only allows adenine to pair with thymine and cytosine to complement guanine. If one strand or side of the DNA ladder is known, then the complementary strand can be deduced. Complementary base pairing keeps the amount of thymine equal to the amount of adenine and the amount of cytosine the same as the amount of guanine in the DNA of organisms.

Adenine is a nucleobase. The DNA molecule is shaped like a ladder, and pairs of nucleobases, one from each side of the ladder, form the rungs. The bases encode genetic information.

The reason why adenine pairs with uracil in RNA instead of thymine is possibly because uracil is easier to make than thymine. RNA is typically used for the transfer of genetic data, while DNA is used for permanent storage. Making multiple copies of RNA, utilizing a more energy efficient nucleobase, eases the transfer process. Another reason why thymine may be adenine's pair in DNA, rather than uracil, is that it makes repair of damaged DNA easier.Deoxyribonucleic acid, or DNA, contains the entire set of information essential for the survival of an organism. This set of instructions are encoded in a double-helix stranded structure composed of nucleotide monomers. Each nucleotide carries a phosphate group, a five-carbon sugar called a deoxyribose and one of four nucleobases. The four nitrogen-containing bases found in DNA are A, T, C and G. A and G are classified as "purines," while C and T are considered as "pyrimidines." Purines are bigger in size compared to pyrimidines.

An important discovery regarding the structure of DNA was made by Edwin Chargaff in 1949. In one of his experiments, Chargaff illustrated that the quantity of A is equal to that of T, while the quantity of C is equal to that of G. He then concluded that the complementary base of A must be T and the complementary base of C must be G. Chargaff's findings formed the basis for the base pairing principle of DNA.

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