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DNA exists in many possible conformations that include A-DNA, B-DNA, and Z-DNA forms, although only B-DNA and Z-DNA have been directly observed in functional organisms. [14] The conformation that DNA adopts depends on the hydration level, DNA sequence, the amount and direction of supercoiling, chemical modifications of the bases, the type and ...
For example, in Spanish, nouns composed of a verb and its plural object usually have the verb first and noun object last (e.g. the legendary monster chupacabras, literally "sucks-goats", or in a more natural English formation "goatsucker") and the plural form of the object noun is retained in both the singular and plural forms of the compound ...
A plural base title can also redirect to an article (Bookends redirects to Bookend; Faces redirects to Face). If separate primary topics are determined, add a hatnote from the plural page to the singular form (or vice versa). Sometimes, what appears to be a plural form may also be a separate word, which can influence the primary topic decision.
The plural is often used in English to speak of something generally, whereas the singular (of a countable noun) is more often used to speak of a particular thing, and it means one particular thing, so is not speaking about it generally. The phrase "Mile per hour" sounds awkward and is generally not used by native speakers unless speaking about ...
Deoxyribonucleic acid (DNA) is a nucleic acid containing the genetic instructions used in the development and functioning of all known living organisms. The chemical DNA was discovered in 1869, but its role in genetic inheritance was not demonstrated until 1943. The DNA segments that carry this genetic information are called genes.
In some languages, including English, expressions that appear to be singular in form may be treated as plural if they are used with a plural sense, as in the government are agreed. The reverse is also possible: the United States is a powerful country. See synesis, and also English plural § Singulars as plural and plurals as singular.
Latin has different singular and plural forms for nouns, verbs, and adjectives, in contrast to English where adjectives do not change for number. [10] Tundra Nenets can mark singular and plural on nouns, verbs, adjectives, adverbs, and postpositions. [11] However, the most common part of speech to show a number distinction is pronouns.
Welsh has two systems of grammatical number, singular–plural and collective–singulative. Since the loss of the noun inflection system of earlier Celtic, plurals have become unpredictable and can be formed in several ways: by adding a suffix to the end of the word (most commonly -au), as in tad "father" and tadau "fathers", through vowel affection, as in bachgen "boy" and bechgyn "boys", or ...