Which of the following describes the shape of DNA?

• SIngle Helix

• Double staircase

• Double helix

• Single ladder

Which scientist discovered the structure of DNA by taking an x ray?

• James Watson
• Rosalind Franklin
• Gregor Mendel

• Francis Crick

Which of the following is not a nucleotide base?

• Adenine
• Glucose
• Cytosine
• Thymine

How do the nucleotide bases pair together?

• A pairs with C, and T pairs with G.
• G pairs with T, and A pairs with C.
• C pairs with A, and T pairs with G.
• A pairs with T, and C pairs with G.

Match the following nucleotide bases with the correct pairs.

ATCCGATAC

• TAGGCTAGT
• TAGGCTATG
• CGATCGTAC
• ATCCGATAC

Match the following nucleotide bases with the correct pairs.

GCGTATTAG

• CGCATAATC

• GCGTATTAG

• CGCTATTAG

• TAGCATTAT

During DNA replication, DNA is ...

• Altered

• Exchanged

• Copied

• Deleted

Label the nucleotide

a

b

c

Sugar

Nitrogenous base

Phosphate

Tags

NGSS.HS-LS1-1

What kind of bonds hold the nucleotide bases together?

• Ionic bonds
• Covalent bonds
• Nitrogen bonds

• Hydrogen bonds

Which of the following is a base pair?

• Adenine - Cytosine

• Cytosine - Thymine

• Deoxyribose - Cytosine

• Cytosine - Guanine