DNA

Cytosine always equals.....

• Thymine
• Adenine
• Cytosine
• Guanine

Guanine always equals .....

• Adenine
• Thymine
• Cytosine
• Guanine

Thymine always equals .....

• Guanine
• Adenine
• Cytosine
• Thymine

Adenine always equals.....

• Thymine
• Cytosine
• Guanine
• Adenine

What is the first step in making a copy of DNA?

• The DNA opens up and separates into two.
• Neuclotides match up.
• Neuclotides join the open DNA strands.
• Two identical strands are formed.

Which shows the correct complementary base pairing for DNA?

• C-A, T-G
• A-G, C-T
• C-G, U-A
• T-A, G-C

Name this structure

• double helix
• nucelotide
• amino acid
• protein

What are the 4 nitrogen bases?

• adenine, thymine, cytoplasm, and guanine
• adenine, thymine cytosine, and guanine
• adenine, thymine, cytosine, and gylcerol
• adenine, thymine, cytosine, and glucose

Which of the following best describes a DNA molecule?

• double helix
• contains ribose
• made of amino acids
• contains uracil

Which 2 molecules form the sides (backbone) of the DNA ladder?

• deoxyribose sugar and adenine
• deoxyribose sugar and a hydrogen bond
• deoxyribose sugar and the nucleus
• deoxyribose sugar and phosphate