BIO 171 Final Exam 2026 Questions and
Answers Graded A+
What is the hereditary agent? - Correct answer-DNA
What did Fred Griffith use in his experiment? - Correct answer-Bacteria cells (R
and S), Streptococcos Pnemonia
What the difference between the R cells and S cells? - Correct answer-R cells are
rough and non virulent while S cells are smooth and virulent.
What was the conclusion of Griffiths experiment? - Correct answer-S cells have a
transforming principle
What did Avery, McCleod, and McCarty (AMM) do in their experiment? - Correct
answer-Killed S cells and added living R cells
In AMM experiment 1: what did the protease cause? - Correct answer-Cells to be
transformed
In AMM experiment 2: what did the RNase cause? - Correct answer-Cells to be
transformed
, In AMM experiment 3: what did DNase cause? - Correct answer-Cells were not
transformed
What was the conclusion of AMM experiment? - Correct answer-DNA is the
hereditary agent
What did Hershey and chase do in their experiment? - Correct answer-Grew phage
in media with 35S and 32P
What happened in Hershey and Chase experiment with 35S? - Correct answer-It
labels proteins and did not make it into new phages.
What happened in Hershey and Chase experiment with 32P? - Correct answer-It
labels DNA and was transmitted to offspring which proved that DNA is the
hereditary agent.
What is Chargaff's rules? - Correct answer-A:T=1:1
G:C=1:1
What did Wilkins, Franklin, and Gosling do? - Correct answer-Created a x-ray
diffraction photo of DNA
Who proposed the double hellix? - Correct answer-Watson and crick
Why are Hydrogen bonds used to hold the double helix together? - Correct answer-
They break apart and can be put back together easily
Answers Graded A+
What is the hereditary agent? - Correct answer-DNA
What did Fred Griffith use in his experiment? - Correct answer-Bacteria cells (R
and S), Streptococcos Pnemonia
What the difference between the R cells and S cells? - Correct answer-R cells are
rough and non virulent while S cells are smooth and virulent.
What was the conclusion of Griffiths experiment? - Correct answer-S cells have a
transforming principle
What did Avery, McCleod, and McCarty (AMM) do in their experiment? - Correct
answer-Killed S cells and added living R cells
In AMM experiment 1: what did the protease cause? - Correct answer-Cells to be
transformed
In AMM experiment 2: what did the RNase cause? - Correct answer-Cells to be
transformed
, In AMM experiment 3: what did DNase cause? - Correct answer-Cells were not
transformed
What was the conclusion of AMM experiment? - Correct answer-DNA is the
hereditary agent
What did Hershey and chase do in their experiment? - Correct answer-Grew phage
in media with 35S and 32P
What happened in Hershey and Chase experiment with 35S? - Correct answer-It
labels proteins and did not make it into new phages.
What happened in Hershey and Chase experiment with 32P? - Correct answer-It
labels DNA and was transmitted to offspring which proved that DNA is the
hereditary agent.
What is Chargaff's rules? - Correct answer-A:T=1:1
G:C=1:1
What did Wilkins, Franklin, and Gosling do? - Correct answer-Created a x-ray
diffraction photo of DNA
Who proposed the double hellix? - Correct answer-Watson and crick
Why are Hydrogen bonds used to hold the double helix together? - Correct answer-
They break apart and can be put back together easily
