AP Biology DNA Structure and Replication

Select all correct information regarding telomeres.

• Telomeres are a string of repeated sequences in DNA.

• They prevent chromosomes from accidentally attaching.

• If missing, they are added by telomerase

• All of these are true

The polymerase chain reaction allows scientists to create several copies of a short DNA sequence in a test tube. Choose all correct ingredients to this reaction.

• A sample of DNA to be the template

• The four dNTPs

• Two short, artificial primers

• A DNA polymerase and salts to neutralize the pH

The nitrogenous base adenine pairs with what other base to form a base pair?

Check all of the correct functions of DNA.

• Stores genetic information

• Expresses coded information as phenotypes

• Activates a receptor

• Undergoes precise replication

Tags

NGSS.HS-LS1-1

Deoxyadenosine triphosphate, deoxythymidine triphosphate, deoxycytidine triphosphate, and deoxyguanosine triphosphate are collectively referred to as:

• deoxyribonucleoside triphosphates

• deoxyribonucleic acids

• triphosphate groups

• base pairs

DNA ____________ catalyzes the addition of nucleotides to a new DNA chain.

Eukaryotic chromosomes are what compared to prokaryotic chromosomes? Select all correct answers.

• Faster at replicating

• Longer

• Linear rather than circular

• Circular rather than linear

The _________ fork is where the DNA is split into singular chains to allow binding.

Errors in replication can be mended by:

• Okazaki fragmentation

• Proofreading

• Mismatch repair

• Removal of the original DNA from the cell

What is the total DNA sequence present in all a cell's chromosomes called?

• Genus

• DNA strand

• Genome

• Canonical strand