| 单词 | thymine |
| 例句 | He was just as sure that thymine was also wrongly assigned an enol configuration. Double Helix 1968-02-27T00:00:00Z There was no questioning of the decision to put guanine and thymine in the keto form. Double Helix 1968-02-27T00:00:00Z The only difference in code between the gene’s original and the RNA copy was the substitution of the thymine to a uracil. The Gene 2016-06-02T00:00:00Z Furthermore, the hydrogen-bonding requirement meant that adenine would always pair with thymine, while guanine could pair only with cytosine. Double Helix 1968-02-27T00:00:00Z Several days later, when they bumped into each other in the Cavendish tea queue, Francis learned that a semirigorous argument hinted that adenine and thymine should stick to each other by their flat surfaces. Double Helix 1968-02-27T00:00:00Z Always pairing adenine with thymine and guanine with cytosine meant that the base sequences of the two intertwined chains were complementary to each other. Double Helix 1968-02-27T00:00:00Z Also pleasing was the great accuracy of the data, which illustrated better than any previous analytical work the equality of adenine with thymine and guanine with cytosine. Double Helix 1968-02-27T00:00:00Z Conceivably, adenine equaled thymine because of a yet undiscovered role in the ordering of the bases. Double Helix 1968-02-27T00:00:00Z In fact, when I was away in the Alps he had spent a week trying to prove experimentally that in water solutions there were attractive forces between adenine and thymine, and between guanine and cytosine. Double Helix 1968-02-27T00:00:00Z More over, the proportion of adenine and thymine groups varied with their biological origin. Double Helix 1968-02-27T00:00:00Z Against me was the awkward chemical fact that I had chosen the wrong tautomeric forms of guanine and thymine. Double Helix 1968-02-27T00:00:00Z This was no reason, however, not to tell Maurice that conceivably adenine was attracted to thymine and guanine to cytosine. Double Helix 1968-02-27T00:00:00Z “Suddenly I became aware that an adenine thymine pair was identical in shape to a guanine cytosine pair...no fudging was required to make the two types of base pairs identical in shape.” The Gene 2016-06-02T00:00:00Z Most important, two symmetrical hydrogen bonds could also hold together pairs of guanine, cytosine, or thymine. Double Helix 1968-02-27T00:00:00Z For example, exposure to water can cause a chemical reaction called deamination that changes the nucleotide cytosine such that it appears to be the nucleotide thymine upon analysis. How Archaeological Methods Are Helping Identify Victims of the Hawaii Wildfires 2023-08-25T04:00:00Z These mechanisms include mismatch repair to replace nucleotides that are paired with a non-complementary base and nucleotide excision repair, which removes bases that are damaged such as thymine dimers. Concepts of Biology 2013-04-25T00:00:00Z These bases form complementary base pairs consisting of one purine and one pyrimidine, with adenine pairing with thymine, and cytosine with guanine. Chemistry 2019-02-14T00:00:00Z When individuals are exposed to UV, pyrimidine dimers, especially those of thymine, are formed; people with xeroderma pigmentosa are not able to repair the damage. Biology for AP Courses 2022-06-09T00:00:00Z RNA uses the sugar ribose instead of deoxyribose, RNA generally is single stranded, and RNA contains uracil in place of thymine. Miller & Levine Biology 2018-01-01T00:00:00Z Finally, instead of the base thymine, RNA contains the base uracil. Anatomy and Physiology 2013-06-19T00:00:00Z Adenine and thymine are connected by two hydrogen bonds, and cytosine and guanine are connected by three hydrogen bonds. Concepts of Biology 2013-04-25T00:00:00Z The two nucleobases, called cytosine and thymine, newly identified in the meteorites may have eluded detection in previous examinations because they possess a more delicate structure than the other three, the researchers said. Could key ingredients for life have arrived from space? Scientists say yes 2022-04-26T04:00:00Z These are not repaired because of a defect in the nucleotide excision repair enzymes, whereas in normal individuals, the thymine dimers are excised and the defect is corrected. Biology for AP Courses 2022-06-09T00:00:00Z The nucleotides that make up DNA have four types of nitrogenous bases: adenine, guanine, cytosine, and thymine. Miller & Levine Biology 2018-01-01T00:00:00Z The “choices” of base for DNA are adenine, cytosine, guanine, and thymine. Anatomy and Physiology 2013-06-19T00:00:00Z However, they do not contain thymine, which is instead replaced by uracil, symbolized by a “U.” Concepts of Biology 2013-04-25T00:00:00Z There are different potential ways to store this information in DNA - for example, a zero in binary code could be represented by the bases adenine or cytosine and the one represented by guanine or thymine. Scientists claim big advance in using DNA to store data 2021-12-01T05:00:00Z Base pairing takes place between a purine and pyrimidine; namely, A pairs with T and G pairs with C. Adenine and thymine are complementary base pairs, and cytosine and guanine are also complementary base pairs. Biology for AP Courses 2022-06-09T00:00:00Z But instead of encoding that data as zeros and ones as computers do, the basic building blocks for DNA are the nucleotides adenine, thymine, cytosine, and guanine — A, T, C, and G for short. Star Trek creator’s signature will live long and prosper in new NFT 2021-11-30T05:00:00Z Adenine always binds with thymine, and cytosine always binds with guanine. Anatomy and Physiology 2013-06-19T00:00:00Z Recall that adenine nucleotides pair with thymine nucleotides, and cytosine with guanine. Concepts of Biology 2013-04-25T00:00:00Z To do so, researchers typically convert a data file’s string of digital 1s and 0s into combinations of the molecule’s four bases: adenine, guanine, cytosine, and thymine. Scientists ‘program’ living bacteria to store data 2021-01-11T05:00:00Z When exposed to UV, thymines lying adjacent to each other can form thymine dimers. Biology for AP Courses 2022-06-09T00:00:00Z Guanine became adenine, for instance; cytosine became thymine. Column One: Comet tails and a Trojan horse: One laboratory's hunt for a COVID-19 vaccine 2020-11-13T05:00:00Z In such mutations, a single DNA base—adenine, cytosine, thymine, or guanine—is replaced by one that disrupts a needed protein or otherwise impairs the power plant. New method to edit cell’s ‘powerhouse’ DNA could help study variety of genetic diseases 2020-07-08T04:00:00Z It also differs from DNA in that it contains the sugar ribose, rather than deoxyribose, and the nucleotide uracil rather than thymine. Concepts of Biology 2013-04-25T00:00:00Z Previous DNA storage approaches treated the four key DNA components known as bases—adenine, thymine, cytosine and guanine—like electronic bits, the 1s and 0s that encode digital data. “Punch Card” DNA Could Mean Cheaper High-Capacity Data Storage 2020-04-08T04:00:00Z The thymine dimers distort the structure of the DNA double helix, and this may cause problems during DNA replication. Biology for AP Courses 2022-06-09T00:00:00Z Each letter represents a chemical — adenine, thymine, cytosine, guanine — known as a nucleotide. Column One: Comet tails and a Trojan horse: One laboratory's hunt for a COVID-19 vaccine 2020-11-13T05:00:00Z In experiments with human cells, the conversion of cytosine to thymine occurred up to 50% of the time, the collaboration reports today in Nature. New method to edit cell’s ‘powerhouse’ DNA could help study variety of genetic diseases 2020-07-08T04:00:00Z This is the basis for Chargaff’s rule; because of their complementarity, there is as much adenine as thymine in a DNA molecule and as much guanine as cytosine. Concepts of Biology 2013-04-25T00:00:00Z The fundamental building blocks of DNA are the four bases adenine, cytosine, guanine and thymine. DNA tool could correct 89% of genetic defects 2019-10-21T04:00:00Z The amount of adenine and thymine is equal to guanine and cytosine and is found in equal quantities. Biology for AP Courses 2022-06-09T00:00:00Z Schmidt and colleagues found that the snippets were rich in adenine and thymine nucleotides, and often came from either one of the two ends of an RNA transcript. CRISPR tool puts RNA on the record 2018-10-02T04:00:00Z Among Europeans, the excess cytosine to thymine mutations existed in early farmers but not in hunter-gatherers, she reported. Why microbes are better than people at keeping DNA mutations at bay 2018-04-11T04:00:00Z Nucleotide excision repair is particularly important in correcting thymine dimers, which are primarily caused by ultraviolet light. Concepts of Biology 2013-04-25T00:00:00Z Base editing alters the fundamental building blocks of DNA: the four bases adenine, cytosine, guanine and thymine. 'Chemical surgery' performed on embryos 2017-09-28T04:00:00Z The amount of adenine, thymine, guanine, and cytosine varies from species to species and they are not found in equal quantities. Biology for AP Courses 2022-06-09T00:00:00Z The vast chains of DNA in each cell are made of just four molecules — adenine, guanine, thymine and cytosine — arranged in enormously varied configurations. Who needs hard drives? Scientists store film clip in DNA 2017-07-12T04:00:00Z DNA is very similar to RNA, except that uracil is replaced with thymine. ‘RNA world’ inches closer to explaining origins of life 2016-05-12T04:00:00Z In a thymine dimer, two thymine nucleotides adjacent to each other on one strand are covalently bonded to each other rather than their complementary bases. Concepts of Biology 2013-04-25T00:00:00Z All of the proteins in the body are coded in recipes in DNA’s four-letter code – adenine, guanine, cytosine, thymine – on double-helix-shaped molecules in the chromosomes that are deep within every human cell. In The Book Of Life, A Second Map Is Deciphered 2015-02-24T05:00:00Z Adenine pairs up with thymine and cytosine pairs with guanine. Biology for AP Courses 2022-06-09T00:00:00Z Referring to 38,765.05 daltons as corresponding uniquely to a DNA strand containing the subunits 43 adenine, 28 guanine, 19 cytosine and 35 thymine was a simplification for illustrative purposes. Readers Respond to "The World Without Free Will" 2014-09-21T04:00:00Z Among the atoms in DNA are four—cytosine, adenine, guanine, thymine—that are used to store the information in our genes and in the researchers’ books. What if Big Data is Too Big? A Radical Solution May Be in DNA 2012-11-28T15:52:46Z Adenine always bonds with thymine, and cytosine always bonds with guanine. Concepts of Biology 2013-04-25T00:00:00Z The team developed an automated system to introduce the base gradually to a strain of Escherichia coli that couldn't make thymine on its own. Chemical biology: DNA's new alphabet 2012-11-21T18:21:07.117Z Adenine pairs up with cytosine and thymine pairs with guanine. Biology for AP Courses 2022-06-09T00:00:00Z The difference between these two bases is one methyl group: thymine is a 5-methyluracil. History of Phosphorus They then translated the code into the DNA: Zeros were encoded in guanine and thymine, ones in adenine and cytosine. What if Big Data is Too Big? A Radical Solution May Be in DNA 2012-11-28T15:52:46Z When these patients are exposed to UV light, thymine dimers are formed and they are not able to repair this defect. Biology for AP Courses 2022-06-09T00:00:00Z After about five months, some of the bacteria couldn't survive without chlorouracil and they had expunged roughly 90% of the thymine from their genomes. Chemical biology: DNA's new alphabet 2012-11-21T18:21:07.117Z Adenine pairs up with thymine and cytosine pairs with guanine. Biology for AP Courses 2022-06-09T00:00:00Z The fragment exposed to UV light contains thymine dimers. Biology for AP Courses 2022-06-09T00:00:00Z The fragment exposed to UV light contains thymine dimers. Biology for AP Courses 2022-06-09T00:00:00Z Thymines lying parallel to each other can form thymine dimers when exposed to UV light. Biology for AP Courses 2022-06-09T00:00:00Z Damage to DNA induced by ultraviolet radiation occurs with the formation of bonds between an adjacent pair of pyrimidine nucleotides, thymine and cytosine, on the same strand of DNA. Biology for AP Courses 2022-06-09T00:00:00Z Adenine pairs up with thymine and cytosine pairs with guanine. Biology for AP Courses 2022-06-09T00:00:00Z He found that the amount of adenine equals the amount of thymine, and the amount of cytosine equals the amount of guanine, or A = T and G = C. This is also known as Chargaff’s rules. Biology for AP Courses 2022-06-09T00:00:00Z The base pairs are stabilized by hydrogen bonds; adenine and thymine form two hydrogen bonds and cytosine and guanine form three hydrogen bonds. Biology for AP Courses 2022-06-09T00:00:00Z DNA contains deoxyribose and thymine, while RNA contains ribose and uracil. Biology for AP Courses 2022-06-09T00:00:00Z Adenine and thymine form two hydrogen bonds and cytosine and guanine form three hydrogen bonds. Biology for AP Courses 2022-06-09T00:00:00Z Adenine pairs with thymine and guanine pairs with cytosine. Biology for AP Courses 2022-06-09T00:00:00Z Adenine pairs with cytosine and guanine pairs with thymine. Biology for AP Courses 2022-06-09T00:00:00Z Adenine and cytosine form three hydrogen bonds and guanine and thymine form two hydrogen bonds. Biology for AP Courses 2022-06-09T00:00:00Z Adenine pairs with cytosine and guanine pairs with thymine. Biology for AP Courses 2022-06-09T00:00:00Z Adenine and cytosine form three hydrogen bonds and guanine and thymine form two hydrogen bonds. Biology for AP Courses 2022-06-09T00:00:00Z Adenine pairs with cytosine and guanine pairs with thymine. Biology for AP Courses 2022-06-09T00:00:00Z When these patients are exposed to UV light, the thymine dimers are formed and they are able to repair this defect. Biology for AP Courses 2022-06-09T00:00:00Z When these patients are exposed to UV light, the adjacent thymine cannot form thymine dimers and they are not able to repair this defect. Biology for AP Courses 2022-06-09T00:00:00Z Thymines lying adjacent to each other can form thymine dimers when exposed to UV light. Biology for AP Courses 2022-06-09T00:00:00Z The fragment exposed to UV light contains thymine dimers. Biology for AP Courses 2022-06-09T00:00:00Z Adenine and cytosine form two hydrogen bonds and guanine and thymine form three hydrogen bonds. Biology for AP Courses 2022-06-09T00:00:00Z Thymines lying adjacent to each other can form thymine dimers when exposed to UV light. Biology for AP Courses 2022-06-09T00:00:00Z The amount of adenine, thymine, guanine, and cytosine varies from species to species and are not found in equal quantities. Biology for AP Courses 2022-06-09T00:00:00Z The amount of adenine, thymine, guanine, and cytosine varies from species to species and is found in equal quantities. Biology for AP Courses 2022-06-09T00:00:00Z |
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