AP Bio Feedback

What feature did Hershey and Chase use to differentiate between the protein and nucleic acid in their experiment?

• Proteins have phosphorus and Nucleic acids have sulfur

• Proteins have sulfur and Nucleic acids have phosphorus

• Proteins are single stranded and Nucleic acids are double stranded

• Proteins are double stranded and Nucleic acids are single stranded

What information did Chargaff provide to Watson and Crick to aid in their understanding of base pairing?

• adenine pairs with thymine and guanine pairs with cytosine.

• adenine pairs with guanine and thymine pairs with cytosine.

• adenine pairs with cytosine and guanine pairs with thymine.

• adenine pairs with adenine and thymine pairs with thymine.

Which scientist(s) conclusively proved that DNA was the genetic material for organisms?

• Chargaff

• Watson & Crick (+ Rosalind Franklin)

• Griffith

• Hershey & Chase

• Meselson & Stahl

Which feedback mechanism involves homeostasis of a particular condition by regulating physiological processes?

• Positive Feedback

• Negative Feedback

Tags

NGSS.HS-LS1-3

What is the difference between leading and lagging strands?

• DNA is synthesized in a 5' to 3' direction on the lagging strand and a 3' to 5' direction on the leading strand

• DNA is synthesized in a 3' to 5' direction on the lagging strand and a 5' to 3' direction on the leading strand

• DNA is synthesized continuously on the leading strand and discontinuously on the lagging strand

• DNA is synthesized discontinuously on the leading strand and continuously on the lagging strand

Which of the following enzymes is responsible for joining the Okazaki fragments?

• DNA polymerase

• Helicase

• Primase

• DNA ligase

Which of the following explains the base pairing rules?

• G pairs with T with 3 hydrogen bonds and A pairs with C with 2 hydrogen bonds

• G pairs with T with 2 hydrogen bonds and A pairs with C with 3 hydrogen bonds

• A pairs with T with 2 hydrogen bonds and G pairs with C with 3 hydrogen bonds

• A pairs with T with 3 hydrogen bonds and G pairs with C with 2 hydrogen bonds

Which of the following describes how DNA replication differs between a prokaryotes and eukaryotes?

• Prokaryotes have circular DNA requiring one origin of replication while eukaryotes have multiple origins on linear DNA

• Prokaryotes have linear DNA requiring one origin of replication while eukaryotes have multiple origins on circular DNA

• Prokaryotes have circular DNA requiring multiple origins of replication while eukaryotes have one origin on linear DNA

• Prokaryotes have linear DNA requiring multiple origins of replication while eukaryotes have one origin on circular DNA

Both eukaryotes and prokaryotes have plasmids. What are plasmids?

• large extra-chromosomal, double-stranded, linear DNA molecules

• large extra-chromosomal, double-stranded, circular DNA molecules

• small extra-chromosomal, double-stranded, circular DNA molecules

• small extra-chromosomal, double-stranded, linear DNA molecules

Which of the following genetic engineering techniques is incorrectly described?

• Electrophoresis separates molecules based on size & charge

• Bacterial transformation introduces DNA to bacterial cells

• PCR allows for DNA fragments to be stabilized for engineering processes

• DNA sequencing determines the order of nucleotides in a DNA molecule