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  • 6th grade

DNA

Earth Science - Science

Π§Ρ‚ΠΎ Ρ‚Π°ΠΊΠΎΠ΅ Π”ΠΠš?

ДСзоксирибонуклСиновая кислота (Π”ΠΠšο»Ώ) β€” это ΠΌΠΎΠ»Π΅ΠΊΡƒΠ»Π°, которая Ρ…Ρ€Π°Π½ΠΈΡ‚ Π³Π΅Π½Π΅Ρ‚ΠΈΡ‡Π΅ΡΠΊΡƒΡŽ ΠΈΠ½Ρ„ΠΎΡ€ΠΌΠ°Ρ†ΠΈΡŽ всСх ΠΆΠΈΠ²Ρ‹Ρ… ΠΎΡ€Π³Π°Π½ΠΈΠ·ΠΌΠΎΠ². Она располоТСна Π² ядрС ΠΊΠ»Π΅Ρ‚ΠΎΠΊ ΠΈ опрСдСляСт наслСдствСнныС ΠΏΡ€ΠΈΠ·Π½Π°ΠΊΠΈ.

Π‘Ρ‚Ρ€ΡƒΠΊΡ‚ΡƒΡ€Π° Π”ΠΠš

Π”ΠΠšο»Ώ ΠΈΠΌΠ΅Π΅Ρ‚ Ρ„ΠΎΡ€ΠΌΡƒ Π΄Π²ΠΎΠΉΠ½ΠΎΠΉ спирали, ΠΊΠΎΡ‚ΠΎΡ€ΡƒΡŽ ΠΎΠ±Ρ€Π°Π·ΡƒΡŽΡ‚ Π΄Π²Π° ΠΏΠΎΠ»ΠΈΠΏΠ΅ΠΏΡ‚ΠΈΠ΄Π½Ρ‹Ρ… Ρ†Π΅ΠΏΠΎΡ‡ΠΊΠΈ, скручСнныС Π΄Ρ€ΡƒΠ³ Π²ΠΎΠΊΡ€ΡƒΠ³ Π΄Ρ€ΡƒΠ³Π°. КаТдая Ρ†Π΅ΠΏΠΎΡ‡ΠΊΠ° состоит ΠΈΠ· Π½ΡƒΠΊΠ»Π΅ΠΎΡ‚ΠΈΠ΄ΠΎΠ² β€” ΡΡ‚Ρ€ΠΎΠΈΡ‚Π΅Π»ΡŒΠ½Ρ‹Ρ… Π±Π»ΠΎΠΊΠΎΠ², Π²ΠΊΠ»ΡŽΡ‡Π°ΡŽΡ‰ΠΈΡ… азотистоС основаниС, сахар ΠΈ фосфат.

БущСствуСт Ρ‡Π΅Ρ‚Ρ‹Ρ€Π΅ Ρ‚ΠΈΠΏΠ° азотистых оснований:

  • АдСнин (А)
  • Π’ΠΈΠΌΠΈΠ½ (Π’)
  • Π¦ΠΈΡ‚ΠΎΠ·ΠΈΠ½ (Π¦)
  • Π“ΡƒΠ°Π½ΠΈΠ½ (Π“)

ΠŸΡ€Π°Π²ΠΈΠ»Π° комплСмСнтарности: Π°Π΄Π΅Π½ΠΈΠ½ всСгда соСдиняСтся с Ρ‚ΠΈΠΌΠΈΠ½ΠΎΠΌ, Π° Ρ†ΠΈΡ‚ΠΎΠ·ΠΈΠ½ β€” с Π³ΡƒΠ°Π½ΠΈΠ½ΠΎΠΌ.

Π€ΡƒΠ½ΠΊΡ†ΠΈΠΈ Π”ΠΠš

  • Π₯Ρ€Π°Π½Π΅Π½ΠΈΠ΅ гСнСтичСской ΠΈΠ½Ρ„ΠΎΡ€ΠΌΠ°Ρ†ΠΈΠΈ.
  • ΠŸΠ΅Ρ€Π΅Π΄Π°Ρ‡Π° наслСдствСнных ΠΏΡ€ΠΈΠ·Π½Π°ΠΊΠΎΠ² ΠΎΡ‚ Ρ€ΠΎΠ΄ΠΈΡ‚Π΅Π»Π΅ΠΉ ΠΊ ΠΏΠΎΡ‚ΠΎΠΌΠΊΠ°ΠΌ.
  • Π£ΠΏΡ€Π°Π²Π»Π΅Π½ΠΈΠ΅ процСссами синтСза Π±Π΅Π»ΠΊΠΎΠ².

Π—Π°Π΄Π°Π½ΠΈΠ΅

  1. НарисуйтС схСму Π΄Π²ΠΎΠΉΠ½ΠΎΠΉ спирали Π”ΠΠšο»Ώ.
  2. ΠŸΠΎΠ΄ΠΏΠΈΡˆΠΈΡ‚Π΅ азотистыС основания.
  3. ΠžΠ±ΡŠΡΡΠ½ΠΈΡ‚Π΅, ΠΏΠΎΡ‡Π΅ΠΌΡƒ Π²Π°ΠΆΠ½Π° ΠΊΠΎΠΌΠΏΠ»Π΅ΠΌΠ΅Π½Ρ‚Π°Ρ€Π½ΠΎΡΡ‚ΡŒ оснований.

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