Dictionary » F » Fulcrum

Fulcrum

Fulcrum

Origin: L, bedpost, fr. Fulcire to prop.

1. A prop or support.

2. (Science: mechanics) That by which a lever is sustained, or about which it turns in lifting or moving a body.

3. (Science: botany) An accessory organ such as a tendril, stipule, spine, and the like.

4. (Science: entomology, zoology) The horny inferior surface of the lingua of certain insects. One of the small, spiniform scales found on the front edge of the dorsal and caudal fins of many ganoid fishes.

5. (Science: anatomy) The connective tissue supporting the framework of the retina of the eye.


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Re: What is the difference between chromatide and nucleotide?

... we see at mitosis (when the DNA is highly condensed into its typical X shape). The two chromatids in a chromosome are clamped together (ie, the fulcrum of the X) at the centromere. So: Nucleoside = sugar + base Nucleotide = sugar + base + phosphate Single strand of DNA = sequence of nucleotides ...

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by Julie5
Wed Apr 27, 2011 6:55 pm
 
Forum: Cell Biology
Topic: What is the difference between chromatide and nucleotide?
Replies: 3
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