Molecular Genetics Flashcards by Armaan F | Brainscape

Q

What direction does DNA run in?

A

Anti Parallel, 2 opposite ways

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Q

What unzips the DNA strand?

A

Enzyme called helicase

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Q

What are the 2 bases?

A

Purines, and pyrimidines

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Q

What do purines contain?

A

Guanine and Adenine

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Q

What do pyrimidines contain?

A

Cytosine and thymine

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Q

What strand are Okazaki fragments on?

A

Lagging strand

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Q

How long are okazaki fragments?

A

around 200 nucleotides long

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Q

What strand is continuous?

A

Leading Strand

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Q

What does deletion do?

A

Removes a gene

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Q

What does addition/duplication do?

A

Adds an extra gene

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Q

What does inversion do?

A

Reverses the order of the genes

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Q

What does a translocation do?

A

Moves a segment of genes from one chromosome to another

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Q

What is a silent mutation?

A

Base changes but AA doesnt, so same protein shape

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Q

What is a nonsense mutation?

A

Codes for a stop codon to be made

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Q

What is a codon?

A

3 bases combined to make a amino acid

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Q

What is a missense mutation?

A

Codes for different AA, changing protein sequence

Q

What is the adding or deleting of a nucleotide called?

A

Frame Shift Mutation

Q

A