Unit 4 Notes Understanding DNA

​Unit 4: Changes in Genes and Affects on Organisms

DNA Structure

Multiple Choice

If you placed all of the DNA in your body end to end, how far do you think it would stretch?

• It would stretch from one end of Sanford to the other

• It would stretch from the southern border of Maine to Canada

• It would stretch all the way around the world

• It would stretch all the way to the end of our solar system and back

Multiple Choice

In humans, our DNA is found in the...

• ribosomes

• nucleus

• mitochondria

• golgi apparatus

Multiple Choice

These are the building blocks of DNA...

• amino acids

• fatty acids

• nucleotides

• aminotides

Multiple Choice

How are nucleotides held together?

• hydrogen bonds

• ionic bonds

• covalent bonds

Multiple Choice

Which of the following are the correct pairing for DNA bases?

• A&T, C&G

• A&G, T&C

• A&C, T&G

Multiple Choice

Which of the following are the correct pairing for DNA bases?

• A&T, C&G

• A&G, T&C

• A&C, T&G

Multiple Select

Which of the following are purines?

• Adenine

• Thymine

• Cytosine

• Guanine

Multiple Select

Which of the following are pyrimidines?

• Adenine

• Thymine

• Cytosine

• Guanine

Multiple Choice

Base pairs in DNA are held together by...

• hydrogen bonds

• ionic bonds

• covalent bonds