DNA Replication

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DNA is a

Multiple Choice

Where do we receive DNA from?

• Only mom

• Only dad

• Both mom and dad

• The environment.

Multiple Choice

What is DNA made up of?

• nucleic acids

• RNA

• nucleotides

• cells

Multiple Select

What are the three parts of DNA?

• deoxyribose

• phosphate group

• nitrogenous bases

• oxygen

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DNA is in the shape of a ​​

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​

DNA Replication

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DNA has TWO strands and they run antiparallel to each other.

Antiparallel Strands

Nitrogenous bases pair together:

• Adenine - Thymine (A - T)

• Cytosine - Guanine (C - G)

​Base Pairs

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Adenine pairs with ​

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in DNA.

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Guanine pairs with​

Placeholder

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cytosine

guanine

adenine

thymine

DNA has TWO functions:

• Inheritance

• Gene Expression

DNA Function

• DNA stores information that is needed to make a cell and an organism.

• DNA needs to be copied so that information can be passed to new cells and organisms.

DNA Inheritance

Multiple Choice

How can DNA pass on information to make new cells and new organisms?

• It needs to be copied.

• It cannot do that.

• Through base pairs.

• Meiosis

DNA replicates during the synthesis stage before mitosis and meiosis.

DNA Replication and Inheritance

Multiple Choice

When does DNA replication occur?

• During mitosis

• During meiosis

• After mitosis and meiosis.

• Before mitosis and meiosis.

In order to replicate, DNA's double-helix "unzips" into two strands at the hydrogen bonds.

DNA Replication and Inheritance

Multiple Choice

Where do the DNA strands unzip at during replication?

• Oxygen bonds

• Hydrogen bonds

• Carbon bonds

• Phosphate bonds

Each DNA strand acts as a template for a new strand to form.

The nitrogenous bases will pair up at each strand.

DNA Replication and Inheritance

At the end, two DNA identical molecules exist and they both have a strand from the original molecule and a new strand.

DNA Replication and Inheritance

Multiple Choice

How many DNA molecules exist after replication?

• 1

• 2

• 3

• 4