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  • The molecular structure of D N A and R N A are depicted. Or The D N A double helix structure has two phosphate deoxyribose chains with the nucleotide bases are single bonded to it. The R N A single helix structure has a single phosphate deoxyribose chain with nucleotide bases attached to it.

    Why is RNA just as cool as DNA? Join the Amoeba Sisters as they compare and contrast RNA with DNA. Part of "The Amoeba Sisters" series.

    (Source: DCMP)

  • Illustration of a strand of DNA with a substance on one edge of it. Caption: To make a protein, the DNA is opened by an enzyme.

    Part of the "Inside the Living Cell" series. Illustrates how genetic instructions carried on DNA are transcribed into RNA, leading to the production of specific enzymes that control the thousands of biochemical processes occurring in living cells. Provides an overview of the protein basis of life, enzymatic reactions, amino acids and DNA, how proteins are built, and gene activation.

    (Source: DCMP)

  • Microscopic view of an irregularly shaped organism. Spanish captions.

    Identifying the key molecular players in planarian regeneration may offer clues into how the process may work in other species, including humans. HHMI investigator Alejandro Sánchez Alvarado and postdoctoral fellow Alice Accorsi use RNA-mediated genetic interference (RNAi) to silence different genes in planaria and determine how they affect regeneration.

    (Source: DCMP)

  • Double helix strand of DNA with protein pairs on each step. For example, AT and CG. For each pair, one letter is smaller than the other. Caption: one large, and one small--

    In the early 1950s, American biologist James Watson and British physicist Francis Crick came up with their famous model of the DNA double helix. The structure of DNA, as represented in Watson and Crick's model, is a double-stranded helix. The sugar-phosphate backbones of the DNA strands make up the outside of the helix, while the nitrogenous bases are found on the inside and form hydrogen-bonded pairs that hold the DNA strands together. Other topics covered include DNA replication, RNA transcription, and RNA translation. Part of the "Biology" series.

    (Source: DCMP)

  • Illustration of a flat, narrow animal with a tube exiting from the bottom of the body toward the back. Caption: So what is the key to Planaria regeneration?

    Identifying the key molecular players in planarian regeneration may offer clues into how the process may work in other species, including humans. HHMI investigator Alejandro Sánchez Alvarado and postdoctoral fellow Alice Accorsi use RNA-mediated genetic interference (RNAi) to silence different genes in planaria and determine how they affect regeneration.

    (Source: DCMP)

  • Indicator dots in East Asia. Plane icon in North America with indicator dots beneath the plane. Caption: It heads to North America, where it deplanes,

    Where does the flu come from? How can science make the flu vaccine better? A scientist armed with pipe cleaners and 10,000 RNA samples explains.

    (Source: DCMP)

  • Tangle of thread-like substance. Caption: consisted of a nucleic acid core composed of either DNA or RNA

    Part of the "Branches on the Tree of Life" series. Describes the discovery of viruses and their structure, how viruses are studied, how they infect their hosts, and how they replicate. Provides details on the T-4 bacteriophage and retroviruses, such as HIV.

    (Source: DCMP)

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  • Biology

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    Biology related concepts

    A collection containing 59 resources, curated by Benetech