ASU BIO 340 PRACTICE PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED A+
●● What were the conclusions for the three experiments that led to DNA
being the hereditary meterial?. Answer: 1. The bacterial transforming
principle by Griffith:
found that nonvirulent R-strain takes up a transforming principle from
the virulent heat-killed S-strain. This allowed the R-strain to transform
into S-strain becoming virulent.
2. Avery-MacLeod-McCarty Experiment:
DNA is the transforming factor
3. The Hershey-Chase Experiment:
DNA is the genetic material
●● What are the building blocks of DNA. Answer: nucleotides
●● What are nucleotides composed of?. Answer: 5 carbon sugar,
phosphate group, nitrogenous base
A, T, G, C
●● Nucleotides combine via___. Answer: covalent bonds
●● Nucleotides are assembled into polynucleotide chains by:
, a. endonuclease
b. DNA pol.
c. RNA pol.
d. helicase. Answer: b. DNA pol
●● Who determined that structure of DNA?. Answer: Crick and Watson
●● Who discovered the secondary structure of proteins using x-ray
crystallography?. Answer: Linus Pauling
●● Does DNA run parallel or anti parallel?. Answer: anti-parallel (strand
one 5'-3')(strand 2 3'-5')
●● What is Chargaff's rule?. Answer: DNA should have a 1:1 ratio(G=C,
A=T)
●● The haploid human genome is 3 Gbp long (3x10^9 bp). There are
approximately 50 trillion cells in the human body. How long would all
of the human genomic DNA in your body be if it were stretch out end to
end?. Answer: ~2m
●● There is approx, 50 trillion cells in the human body. How long would
all of the human DNA in your body be if it were stretched end to end?
a. 10 billion km
QUESTIONS WITH SOLUTIONS GRADED A+
●● What were the conclusions for the three experiments that led to DNA
being the hereditary meterial?. Answer: 1. The bacterial transforming
principle by Griffith:
found that nonvirulent R-strain takes up a transforming principle from
the virulent heat-killed S-strain. This allowed the R-strain to transform
into S-strain becoming virulent.
2. Avery-MacLeod-McCarty Experiment:
DNA is the transforming factor
3. The Hershey-Chase Experiment:
DNA is the genetic material
●● What are the building blocks of DNA. Answer: nucleotides
●● What are nucleotides composed of?. Answer: 5 carbon sugar,
phosphate group, nitrogenous base
A, T, G, C
●● Nucleotides combine via___. Answer: covalent bonds
●● Nucleotides are assembled into polynucleotide chains by:
, a. endonuclease
b. DNA pol.
c. RNA pol.
d. helicase. Answer: b. DNA pol
●● Who determined that structure of DNA?. Answer: Crick and Watson
●● Who discovered the secondary structure of proteins using x-ray
crystallography?. Answer: Linus Pauling
●● Does DNA run parallel or anti parallel?. Answer: anti-parallel (strand
one 5'-3')(strand 2 3'-5')
●● What is Chargaff's rule?. Answer: DNA should have a 1:1 ratio(G=C,
A=T)
●● The haploid human genome is 3 Gbp long (3x10^9 bp). There are
approximately 50 trillion cells in the human body. How long would all
of the human genomic DNA in your body be if it were stretch out end to
end?. Answer: ~2m
●● There is approx, 50 trillion cells in the human body. How long would
all of the human DNA in your body be if it were stretched end to end?
a. 10 billion km
