AP Biology Scoring

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

Tags

NGSS.HS-LS1-1

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