Practice AP Bio Test

Notice the two arrows in the image.  These arrows are emphasizing the antiparallel (going in opposite directions) nature of DNA.  The arrows are also pointing to the ______ end of DNA.

• 5 prime
• 3 prime
• wrong
• right

What type of bond connects bases together in DNA?

• Nitrogen

• Hydrogen

• Carbon

• Sulfur

Adenine pairs with _________.

• Guanine

• Thymine

• Cytosine

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

• The twisting nature of DNA creates nonparallel strands

• One strand is positively charged and other is negatively charged

• 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

Thymine 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 cytosine?

• 42%

• 31%

• 16%

• 8%

Name this structure.

• Deoxyribose sugar

• Amino Acid

• Nucleotide

• Double helix

Inserting an insulin gene into a bacterial plasmid is an example of:

• Gel Electrophoresis

• creating Recombinant DNA

• Some voodoo magic

• Restriction mapping

The technique used to amplify DNA is called ______

• Recombinant DNA

• Genetic Engineering

• Polymerase Chain Reaction (PCR)

• Gene splicing

DNA has a slight ___________ charge.

• Positive

• Negative

Gel Electrophoresis is a technique used to separate DNA fragments based on ________.

• Size

• Number of A's and G's

• Animal species

• Criminal suspects