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DNA

An organic macromolecule that stores information about how to make proteins.

Nucleic Acid

An organic macromolecule that stores genetic information

Nucleotide

The building block that makes up nucleic acids like DNA

Adenine

The base that pairs with Thymine in DNA

Thymine

The base that pairs with Adenine in DNA

Guanine

The base that pairs with Cytosine in DNA

Cytosine

The base that pairs with Guanine in DNA

Uracil

The base that pairs with Adenine in RNA

Uracil

The base that replaces Thymine in RNA

Antiparallel

Having two strands that run parallel to each other, but one is upside down.

Chromosome

A large molecule (chunk) of DNA

Gene

A specific section of DNA that codes for a specific polypeptide

Chromatid

One copy of a chromosome, after DNA replication (one arm of the 'X' shape)

Homologous

An adjective that describes two chromosomes that have the exact same genes, but one comes from mom and one comes from dad

Complementary

An adjective used to describe two bases that always pair up together (e.g. A and T, C and G)

Base

A molecule that makes up the "rungs" of DNA's ladder: A, T, C or G

Chromatin

DNA and histones, in their uncondensed forms (thread-like)

Histones

The proteins in a cell that DNA winds around

Double Helix

A shape like a twisted ladder

DNA

Deoxyribonucleic Acid

Centromere

The point where two sister chromatids are attached

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