AP Biology - Biotechnology

Based on these results whose blood was found in the blood stain at the crime scene?

• Bob
• Sue
• John
• Lisa

Which two bear species are most closely related?

• Bear 1 and Bear 2
• Bear 1 and Bear 3
• Bear 2 and Bear 3
• There’s no way to tell

DNA fingerprinting works because

• Most genes are dominant
• All organisms contain RNA
• The most important genes are different among most people
• No two people, except identical twins, have exactly the same DNA 

What is the purpose of gel electrophoresis?

• helps cut DNA
• count the genes in DNA
• separates DNA based on size
• allows for an exact replicated organism

Why do the fragments of DNA in gel electrophoresis travel away from the negative electrode?

• DNA is negatively charged so attracted to the positive end of the unit
• DNA is positively charged to attracted to the negative end of the unit
• the agarose gel in negatively charged
• the agarose gel is positively charged

In gel electrophoresis, the largest DNA fragment will appear

• closest to the starting wells
• farthest from the starting wells
• three quarters away from the starting wells
• it depends on how many fragments there are

Which is the primary purpose of using restriction enzymes in gel electrophoresis?

• It allows the strands of DNA to be cut into various lengths for testing
• It restricts the number of base pairs that can be tested in a sample
• It makes the testing simpler by moving the strands into the gel faster
• It charges the DNA strands

Which of the following describes the orientation of the DNA found in a run gel electrophoresis?

• Small fragments are found near the well since it is negatively charged

• Large fragments are found near the well while small fragments are found at the other end

• Small fragments are found near the well while large fragments are found at the other end

• Large fragments are found near the well since it is positively charged

If one fragment was placed in the thermocycler for a PCR experiment, how many fragments would exist after 5 cycles?

• 10

• 16

• 64

• 32

The process of directly modifying the DNA of an organism using biotechnology is known as:

• Genetic engineering

• Selective breeding

• Crossbreeding

• Allergic reactions