DNA Practice

What is the correct complementary DNA strand for:

A-T-G-A-C

• C-A-G-T-A

• T-T-C-T-G

• T-A-C-T-G

• T-A-A-T-G

The function of DNA is to:

• store hereditary information that is used to make proteins

• hang out in the nucleus and run the chloroplasts

• take care of how the mitochondria do their jobs

• all of these

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

What is the structure of DNA?

• Double stranded helix

• Single stranded

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

• It cuts the DNA strands in a set location for analysis.

• 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

What is the purpose of gel electrophoresis in DNA analysis?

• To separate DNA based on size

• To visualize DNA fragments

• To create a DNA profile

• To compare DNA sequences

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

A method used to rapidly make multiple copies of a specific segment of DNA.

• PCR (Polymerse Chain Reaction)

• Electrophoresis

• DNA Probe

This is the last step of PCR and it requires the temperature to increase to 72C for one minute. Here, complementary strands will be produced from the corresponding base pairs, reforming the DNA into two new strands.

• Elongation by DNA Polymerase

• Primer Annealing

• Denaturation

Why are restriction enzymes used when making a DNA fingerprint using STRs?

• They are used to determine the size and shape of DNA fragments.

• They are used in order to allow us to determine if a specific family or family member is related to the crime based on their DNA fragments.

• STR bands are units of bases that are typically two to five bases long and repeat multiple times. Restriction enzymes cut these bands since they match the enzyme, making them easily recognisable.

Which part(s) of a hair can be analyzed for DNA?

• root

• cuticle

• medulla

• cortex