PBS Unit 1 Review

What is the structure of purines?

• A single 5 carbon ring

• A single 6 carbon ring

• A double ring

• A triple ring

What is the role of an restriction enzyme?

• Create a pattern of a person's DNA
• Act as molecular scissors that cut DNA
• Separate and compare different DNA sequences
• Produce millions of copies of DNA

_______ has a double ring structure and is an example of a _______

• adenine... purine
• thymine... pyrimidine
• cytosine.....purine
• guanine....pyrimidine

A student wants to test the effects of type of exercise on heart rate.  What is the dependent variable?

• heart rate
• type of exercise
• amount of exercise
• time of day exercise occurs

How many rings does a pyrimidine have?

• 1
• 2
• 3
• 4

What is produced as a result of DNA being cut by restriction enzymes?

• Restriction Fragment Length Polymorphisms 
• Restriction Fragmented Long Palindromes
• Polymerase Chain Reaction
• Polymorphic Fragment Chains

DNA is ________ charged and migrates to the ________ end of the gel.

• negative, positive
• positive, negative
• negative, neutral
• positive, neutral

What is the backbone of DNA made out of?

• Phosphates and sugars
• Basepairs
• Deoxyribose
• Hydrogen bonds

A and T make a _____ bond; they are held together by _______ bonds.

• triple... hydrogen
• double... nitrogen
• double... hydrogen
• triple... nitrogen

Which of the following most likely would contain a good DNA sample?

• Shoeprint
• Tabletop
• Syringe
• Blood