Unit 8 Test - DNA Structure & Replication

What is #1 pointing to?

• A phosphate and a sugar (the back bone of DNA)
• Adenine
• Thymine
• Cytosine

What does the black circle represent?

• Nitrogenous base (A, T, C, or G)
• Deoxyribose sugar
• Nucleotide
• Phosphate group

What does the blue 5 sided shape represent?

• Phosphate group
• Deoxyribose sugar
• Ribose sugar
• Nitrogenous base (A, T, C, or G)

What does the green flag represent?

• Nitrogenous Base (A, T, C, or G)
• Deoxyribose sugar
• Ribose sugar
• Phosphate group

Match the following rules with their descriptions.

• Describes the double helix structure of DNA

• Watson's rules

• States that the percentages of Adenine and Thymine in DNA are equal, and the percentages of Guanine and Cytosine are equal

• Chargaff's rules

• Explains base pairing in DNA

• Crick's rules

According to Chargaff's rules, if 20% of an organism's DNA is made up of the nitrogen base adenine, the percentage of the DNA that would be thymine is (a)   .

• 20%
• 30%
• 40%
• 50%

Match the following biological terms with their functions.

• Building block of nucleic acids

• Nucleic Acid

• Macromolecule used to store genetic information

• Nitrogen Base

• Component of nucleotides involved in base pairing

• Nuleotide

Sequence of DNA that codes for a protein and determines a trait

• Chromosome
• Histone protein
• Gene

According to the table, the species most closely related to the Unknown Species is (a)   .

• Species I
• Species II
• Species III
• Species IV

What would be the complementary sequence of DNA that would match up with the Unknown Species’ DNA? Type your answer in CAPITAL letters with no spaces A C T G C A G C C