LS.10a Structure of DNA

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What is DNA?

Back

DNA (Deoxyribonucleic Acid) is the molecule that carries the genetic instructions for life.

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What is the structure of DNA?

Back

DNA is structured as a double helix, consisting of two strands that wind around each other.

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What are nucleotides?

Back

Nucleotides are the building blocks of DNA, composed of a sugar, a phosphate group, and a nitrogenous base.

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What are the four nitrogenous bases in DNA?

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The four nitrogenous bases in DNA are adenine (A), thymine (T), cytosine (C), and guanine (G).

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What is a gene?

Back

A gene is a segment of DNA that contains the instructions for making a specific protein.

Front

What is the role of hydrogen bonds in DNA?

Back

Hydrogen bonds hold the two strands of DNA together by connecting complementary nitrogenous bases.

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What is the complementary base pair for cytosine in DNA?

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The complementary base pair for cytosine (C) is guanine (G).

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What is chromatin?

Back

Chromatin is a complex of DNA and proteins that forms chromosomes within the nucleus of eukaryotic cells.

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What are chromosomes?

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Chromosomes are tightly coiled structures of DNA that contain many genes.

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Where is DNA found in eukaryotic cells?

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In eukaryotic cells, DNA is primarily located in the nucleus.