Examlex
Mucous membranes are all made of squamous epithelial tissue attached to a basement membrane.
Guanine
Guanine is one of the four main nucleobases found in the nucleic acids DNA and RNA, where it forms base pairs with cytosine.
Cytosine
One of the four main bases found in DNA and RNA, a pyrimidine nucleotide that pairs with guanine.
Nucleus
The central and most important part of an atom, containing protons and neutrons, or a membrane-bound organelle in cells containing the genetic material.
Chromosomes
Structures made of DNA and protein found in the nucleus of cells that carry genetic information from one generation to the next.
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