英文字典中文字典Word104.com



推到 Twitter!
推到 Plurk!
推到 Facebook!
中文字典辭典   英文字典   快遞查詢 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z   







請輸入英文單字,中文詞皆可:

DNA    
數字網絡體系結構

數字網絡體系結構

DNA
n 1: (biochemistry) a long linear polymer found in the nucleus
of a cell and formed from nucleotides and shaped like a
double helix; associated with the transmission of genetic
information; "DNA is the king of molecules" [synonym:
{deoxyribonucleic acid}, {desoxyribonucleic acid}, {DNA}]

macromolecule \mac`ro*mol"e*cule\, n. (Chem., Biochem.)
A very large molecule, especially a polymer having from
hundreds to many thousands of atoms, such as {DNA}, {RNA},
{protein}, {polysaccharide}, {polyethylene}, {polycarbonate},
etc.
[PJC]


deoxyribonucleic acid \deoxyribonucleic acid\ n.
a nucleic acid, usually of very high molecular weight,
consisting of a linear sequence of monomer units of
deoxyribonucleotides, occurring in most organisms in pairs of
strands, wound together in the form of a double helix; it is
the main component of chromosomes and contains the genetic
information which is the basis of heredity, transmitted from
parent to progeny, and found in all living organisms except
for certain viruses which have RNA as their basic genetic
material; -- usually referred to by the acronym {DNA}.

Syn: DNA, desoxyribonucleic acid.
[PJC]

Note: The monomer units making up the DNA each contain one of
four heterocyclic bases: thymine, adenine, cytosine, or
guanine. The genetic information is contained in the
precise sequence of these monomer units, which
ultimately specify the sequence of proteins to be made
by the organism's biosynthetic processes, mediated
through the synthesis of RNA having a base sequence
corresponding to that of the DNA. The DNA sequence also
specifies the sequence of the various RNA molecules the
RNA base sequence being a copy of that on one of the
DNA strands. Most of the RNA synthesized is involved in
protein synthesis. In the double-helical form of DNA,
the thymine on one strand is paired with the adenine on
the opposite strand, and cytosine of one strand is
paired with guanine on the opposite strand. There is in
DNA also certain controlling information concerning the
timing and amount of RNA to be made, encoded within the
sequence of the DNA in ways that are still being
elucidated.
When this structure is replicated in the course of cell
multiplication, two identical double-helical molecules
are formed, each containing one strand from the
original molecule. Each resulting molecule is
distributred to either the parent or progeny organism,
and this is the basic mechanism for transmission of
hereditary information. In RNA-based viruses, or those
having single strands of DNA (as certain viruses), the
genetic information transmission occurs through a
double-stranded intermediate by a similar mechanism.
In some organisms slight modifications of the bases of
DNA are found, such as methylcytosine or, in some
viruses, uracil or hydroxymethyluracil; these unusual
bases act analogously to the normal bases in their
genetic coding function. A small percentage of
methylcytosine is found in many organisms, and it
serves in some cases as a special signal, as for
restriction enzymes.
[PJC]


DNA \DNA\ (d[=e]"[e^]n*[=a]`) n. (Biochemistry, Genetics)
abbreviation for {deoxyribonucleic acid}; -- more commonly
used than the full name. See also {RNA}. [acronym]

Syn: deoxyribonucleic acid, desoxyribonucleic acid,
deoxyribosenucleic acid.
[PJC]

60 Moby Thesaurus words for "DNA":
Altmann theory, DNA double helix, De Vries theory,
Galtonian theory, Mendelianism, Mendelism, RNA, Verworn theory,
Weismann theory, Weismannism, Wiesner theory, allele, allelomorph,
anticodon, biotype, birth, character, chromatid, chromatin,
chromosome, codon, deoxyribonucleic acid, determinant, determiner,
diathesis, endowment, eugenics, factor, gene, gene complex,
gene flow, gene pool, genesiology, genetic code, genetic drift,
genetics, genotype, hereditability, hereditary character, heredity,
heritability, heritage, inborn capacity, inheritability,
inheritance, mRNA, matrocliny, messenger RNA, nucleotide,
operator gene, operon, patrocliny, pharmacogenetics,
recessive character, regulator gene, replication, ribosomal RNA,
structural gene, tRNA, transfer RNA

請選擇你想看的字典辭典:
單詞字典翻譯
DNA查看 DNA 在Google字典中的解釋Google英翻中〔查看〕
DNA查看 DNA 在Yahoo字典中的解釋Yahoo英翻中〔查看〕





安裝中文字典英文字典查詢工具!


中文字典英文字典工具:
選擇顏色:
輸入中英文單字

































































英文字典中文字典相關資料:
  • 新世紀古典創作: Legacy是甚麼意思?
    1 績。 He is not a President who dreams of leaving behind a few tre a ties as his political legacy 他不是那種希望留下幾項條約當政績的總統。 2 遺傳。 My kids are taking steps (e x ercise, lots of fruits and vegetables) to counter the family le g acy 我的小孩都在採取步驟 (運動,多吃蔬果) 來反制家族遺傳。 3 香火延續。
  • 國文科 - tcgs. tc. edu. tw
    劉海是古代仙人,而金蟾是財富象徵,中國有一幅吉祥年畫叫「劉海戲金蟾、步步釣金錢」,畫著劉海手執串錢,準備要釣金蟾圖案,意為財源廣進,步步發財。
  • 「聿」字正音(兼論推導今音方法)
    第四節、推音 推導今音的步驟如下: 1 查中古音資料。 首先查出「聿」字的中古音資料。不錯,推音的確須由《廣韻》所記載的中古音開始向下推,每一字所代表音節的中古音資料,就好像是字音的 dna,可以用來推斷每一音節在後世的音素面貌:
  • hyperrate. com
    %gen_inp %ename NewCJ3 %cname 亂倉打鳥 %selkey 123456789 %flag_disp_partial_match %flag_disp_full_match %flag_vertical_selection %keyname begin





中文字典-英文字典  2005-2009

|中文認字識字與學習 |MD5加密,解密 |中文姓名英譯,姓名翻譯 |简体中文英文字典