AP Bio Unit 6.1 and 6.2

Cytosine makes up 42% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be thymine? 

• 8%
• 16%
• 31%
• 42%

What is meant by the description "antiparallel" regarding the strands that make up DNA? 

• The twisting nature of DNA creates nonparallel strands. 
• The 5' to 3' direction of one strand runs counter to the 5' to 3' direction of the other strand. 
• Base pairings create unequal spacing between the two DNA strands.
• One strand is positively charged and the other is negatively charged. 

This image shows that DNA Replication is _______.

• Conservative
• Semiconservative
• Dispersive
• Spontaneous

Nitrogenous bases are joined by which type of bond?

• polar bonds
• ionic bonds
• covalent bonds
• hydrogen bonds

Which process is used to copy DNA in the nucleus?

• replication
• transcription
• translation

Enzyme that unwinds the DNA

• ligase
• DNA Polymerase
• primase
• helicase

Seals the Okazaki fragments together

• DNA Polymerase
• ligase
• helicase
• primase

Which represents the leading strand?

• A
• B

Which represents the lagging strand?

• A
• B

If a strand reads:
3' A A A T T T C 5'
The matching strand would read...

• 5' T T T A A A G 3'
• 3' T T T A A A G 5'
• 5' A A A T T T C 3'
• 3' U U U A A A G 5'