DNA Structure

DNA Structure

DNA specifies all of an organism's characteristics or traits (eye color, hair color, height, etc.)

​We inherit (receive) DNA from our parents.

DNA is a nucleic acid.

What is DNA?

Multiple Choice

Where do we receive DNA from?

• Only mom

• Only dad

• Both mom and dad

• The environment.

DNA Molecule

After DNA replicates, each chromosome in a cell has TWO DNA molecules.

DNA is made of two strands that are made up of nucleotides.

DNA has three parts: deoxyribose (sugar), a phosphate group, and a nitrogenous base.

Multiple Choice

How many DNA molecules are in each chromosome after DNA replicates?

• 1

• 2

• 3

• 4

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

DNA has a twisted ladder shape, called a double helix.

The rungs of the ladder are pairs of nucleotides.

DNA Molecule

Dropdown

DNA is in the shape of a ​​

Select answer

​

The nucleotides have different nitrogenous bases:

• Adenine

• Guanine

• Cytosine

• Thymine

The sides of the DNA are made up of sugar and phosphate and is called the backbone.

​

DNA Molecule

Multiple Choice

Which one is NOT a nitrogenous base?

• Alanine

• Adenine

• Guanine

• Cytosine

Multiple Select

Which two things make up the backbone?

• Deoxyribose

• Ribose

• Phosphate

• Amino Acids

The bases connect together through hydrogen bonds.

DNA Molecules

Match

Match the following

• Part of a nucleotide that differs between nucleotides.

• Part of the backbone of the DNA double helix.

• Bond that holds two strands of DNA together

• The units that make up a nucleic acid.

Nitrogenous base

Deoxyribose

Hydrogen Bond

Nucleotide

• Nitrogenous base

• Deoxyribose

• Hydrogen Bond

• Nucleotide