DNA Structure 1 Flashcards

1
Q

What is a NUCLÉOSIDE what about Nucleotide?

A

NUCLÉOSIDE: Base + Sugar

NUCLÉOTIDE: Base + Sucre + Phosphate

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2
Q

What are purines?

A

A G

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3
Q

What are pyrimidines?

A

T, C, U

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4
Q

Quelles sont les bases qui composent l’ADN et les bases qui composent l’ARN?

A

ADN: A,G,T, C
ARN: A, G, U, C

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5
Q

Quels sont les sucres dans l’ADN et dans l’ARN?

A

In the RNA: Ribose

In the DNA: Deoxyribose

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6
Q

Qu’est-ce qu’un lien phosphodiester?

A

Phosphates:

Connect to the 5th carbon: Phosphodiester bond

Can have mono, di, and tri-phosphate

Phosphodiester Bond:

Dans l’ADN et l’ARN les nucléotides sont liés par des liens phosphodiester entre les carbones 5’ et 3’ des sucres

5th carbon → connection to self phosphate

3rd carbon → connection to neighbor phosphate

Thus the DNA double helix will be oriented 5’ to 3’:

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7
Q

Qu’est-ce la polarité de l’ADN?

A

1- La structure de l’ADN est une double hélice
2- Les brins l‘ADN ont une polarité 5’ -> 3’

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8
Q

What is the effect of a phosphate bond on a nucleotide?

A

A phosphate bond will make the nucleotide negatively charged

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9
Q

Brin Matrice vs Brin Amorce:

A

Brin Matrice: The blueprint, the template strand

Brin Amorce: the primer strand

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10
Q

Comment les brins sont orientés dans la double hélice?

A

Anti-parallel

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11
Q

Combien de paires de bases par tour d’hélice?

A

10 pairs of nucleotides per sillon

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12
Q

Where are bases found in a double helix?

A

Sucres et phosphates à l’extérieur de l’hélice

Bases à l’intérieur de l’hélice

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13
Q

What are the two base interaction? What holds them together?

A

Hydrogen Bonds

  • A-T interact together
  • 2 hydrogen bonds

G-C Interact together:

  • 3-hydrogen bonds
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14
Q

Les protéines qui se lient à l’ADN sont:
basiques (charge positive) ou bien Acides (charge négative)?

A

basiques (charge positive) becasue DNA is negative due to phosphate bond

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