english dictionary definition meaningYesDictionary.com



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   







Lookup English Definition:

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]

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}]

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




install english dictionary definition & meaning lookup widget!


english dictionary definition meaning工具:
Select Color:

































































english dictionary meaning information:
  • Cambridge Dictionary | English Dictionary, Translations . . .
    The most popular dictionary and thesaurus for learners of English Meanings and definitions of words with pronunciations and translations
  • Dictionary. com | Meanings and Definitions of Words at . . .
    Dictionary com is the world’s leading online source for English definitions, synonyms, word origins and etymologies, audio pronunciations, example sentences, slang phrases, idioms, word games, legal and medical terms, Word of the Day and more For over 20 years, Dictionary com has been helping millions of people improve their use of the English language with its free digital services
  • A - definition of A by The Free Dictionary
    A abbr 1 accusative 2 Games ace 3 across 4 adenine 5 alto 6 ampere 7 or Å angstrom 8 answer 9 area 10 Sports assist a 1 or A (ā) n pl a's or A's also as or As 1 The first letter of the modern English alphabet 2 Any of the speech sounds represented by the letter a 3 The first in a series 4 Something shaped like the letter A 5 A
  • Embed | Definition of Embed by Merriam-Webster
    2 a: to attach (a journalist) to a military unit for the purpose of covering a conflict Ever since the American-led invasion of Iraq last year, when hundreds of journalists were embedded with military units, people in media circles have been debating whether journalists lose their professional detachment under such circumstances and begin to identify too closely with the troops they are covering
  • Mitigation - definition of mitigation by The Free Dictionary
    Usage Note: Mitigate, meaning "to make less severe, alleviate" is sometimes used where militate, which means "to cause a change," might be expected The confusion arises when the subject of mitigate is an impersonal factor or influence, and the verb is followed by the preposition against, so the meaning of the phrase is something like "to be a powerful factor against" or "to hinder or prevent
  • Rasp | Definition of Rasp by Merriam-Webster
    Recent Examples on the Web: Verb The Dutch waited for the match to start before getting their revenge, unleashing a barrage of fouls against the Argentineans before twice almost scoring; Rep narrowly heading the ball wide and then having a rasping shot saved well by Fillol — SI com, "World Cup Countdown: 4 Days to Go - What if Johan Cruyff Had Made the Trip to Argentina?," 10 June 2018 And
  • Code - Wikipedia
    In communications and information processing, code is a system of rules to convert information—such as a letter, word, sound, image, or gesture—into another form or representation, sometimes shortened or secret, for communication through a communication channel or storage in a storage medium An early example is the invention of language, which enabled a person, through speech, to
  • How to Learn Kanji, in 10 Steps - Japanese Rule of 7
    Well, this is probably overkill, but the Kodansha Kanji Learner’s Dictionary will certainly provide you with enough kanji to keep you busy for a while As for learning kanji properly (i e anti-Heisig), I’ve often wondered which is better in the long run
  • courses a-to-z-index - Golden West College
    To view all courses (opens new window) ANTHROPOLOGY G100 – 3 Units Course Outline Introduction to Cultural Anthropology Advisories: English G100 An introduction to the theories, methods, and applications of anthropological inquiry





English Dictionary  2005-2009

|dictionary |Business Directories,Company Directories |ZIP Code,Postal Code