Generalidades Flashcards

1
Q

ácido desoxirribonucleico

A

material genetico

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2
Q

ácido ribonucleico

A

codificación y descodificación del DNA

Síntesis de proteínas

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3
Q

Purina

A

adenina y guanina

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4
Q

Pirimidina

A

citosina, tinia y uracilo

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5
Q

nucleosido

A

pentosa + base nitrogenada

N-glucosídico

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6
Q

nucleotido

A

pentosa + base nitrogenada + fosfato

enlace éster

forma libre: trifosfatados

DNA o RNA: monofosfatada

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7
Q

los nucleotidos como se unen

A

mediante enlaces fosfodiéster

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8
Q

entre donde y donde se se forma el enlace fosfodiester

A

C5 fosfato de un nucleótido y el C3 hidróxido del siguiente nucleótido

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9
Q

ley de chargaff

A

A=T

C=G

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10
Q

estructura DNA

A
doble cadena 
anti paralela 
complementaria
giro helicoidal 
nucleótidos
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11
Q

DNA forma A

A

deshidratado (in vitro)

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12
Q

DNA forma B

A

cromosómico

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13
Q

DNA forma Z

A

secuencias de purinas y pirimidinas

repeticiones de CG

regulación genética

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14
Q

Compactación

A
DNA (2nm)
fibra de nuceosomas (10nm)
fibra solenoide (30nm)
bucles solenoide (300nm)
fibras de  700nm
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15
Q

RNA estructura

A
más abundante 
una sola cadena
contiene urasilo 
ribosa
5 a 3
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