Exploring DNA and Blood Types

What are the four nitrogenous bases found in DNA?

• Adenine, Thymine, Guanine, Cytosine

• Adenine, Uracil, Guanine, Cytosine

• Thymine, Uracil, Guanine, Cytosine

• Adenine, Thymine, Guanine, Uracil

Which blood type is known as the universal donor?

• Type AB

• Type O

• Type A

• Type B

What is the primary function of gel electrophoresis in DNA analysis?

• To amplify DNA

• To separate DNA fragments by size

• To sequence DNA

• To extract DNA from cells

Which base pairs with cytosine in DNA?

• Adenine

• Thymine

• Guanine

• Uracil

What is the shape of the DNA molecule?

• Single helix

• Double helix

• Triple helix

• Linear strand

Which component is NOT part of a DNA nucleotide?

• Phosphate group

• Ribose sugar

• Nitrogenous base

• Deoxyribose sugar

If a DNA strand has the sequence 5'-ATCG-3', what is the complementary sequence?

• 5'-TAGC-3'

• 3'-TAGC-5'

• 5'-CGAT-3'

• 3'-CGAT-5'

A person with blood type AB can receive blood from which of the following types?

• Only AB

• A, B, AB, and O

• Only O

• Only A and B

Why is DNA analysis important in forensic science?

• It helps determine blood pressure

• It can identify individuals based on their unique DNA

• It measures the amount of protein in blood

• It is used to check for viruses

During gel electrophoresis, why do smaller DNA fragments move faster through the gel?

• They are heavier

• They encounter less resistance

• They have more charge

• They are more attracted to the dye