BIO 111 TAMU Fletcher Exam 3 Questions And 100% Correct
Answers Latest Update (A+)
Friedrich Miescher - ANSWER isolated DNA in 1869 But did not know (Isolated
phosphate) rich acidic compounds
Frederick Griffith - ANSWER Discovered transformation during an experiment that
involved injecting mice with smooth S cells, rough R cells, heat-killed S cells, and
heat-killed S cells with living R cells.
Avery, MacLeod, McCarty - ANSWER Identified the heritable substance as DNA
Used test tubes- vitro
Hershey and Chase - ANWER did experiments showing that DNA is the genetic material
of a phage called T2
chargaff - ANWER A=T and C=G
Wilkins and Franklin - ANWER X-ray diffraction was used to identify that DNA shape is
helix
Waston and Crick - ANWER Establishment of the current model for DNA double helix
determination of DNA structure
DNA structure - ANSWER polymer of nucleotides, Nitrogenous base, Sugar, Phosphate
group
Nitrogenous bases in DNA - ANSWER adenine=2, guanine=3, cytosine=3, thymine=2
, purine - ANSWER Adenine and Guanine (2 rings)
Pyrimidine - ANSWER cytosine and thymine (single ring)
DNA double helix - ANSWER Bound covalently, linked by phosphodiester bonds
3' - ANSWER 3rd carbon that has a hydroxyl group
5' - ANSWER 5th carbon that has a phosphate group
Centromere - ANSWER joining point for replicated chromatids
Telomere - ANSWER Nucleotide sequence at the end of the chromatids both ends
chromatid - ANSWER 3 billion base pairs packed together
DNA packaging - ANSWER DNA strand to Nucleosome to 30 then looped domains
(10,30,300,700)
10nm fiber - ANSWER Nucleosomes connected by stretches of DNA
Bead formation
30 nm fiber - ANSWER interactions between nucleosomes cause the thin fiber to coil or
fold into this thicker fiber
300 nm fiber - ANSWER The 30-nm fiber forms looped domains that attach to proteins
700 nm fiber - ANSWER looped domains coil further only seen in metaphase
Answers Latest Update (A+)
Friedrich Miescher - ANSWER isolated DNA in 1869 But did not know (Isolated
phosphate) rich acidic compounds
Frederick Griffith - ANSWER Discovered transformation during an experiment that
involved injecting mice with smooth S cells, rough R cells, heat-killed S cells, and
heat-killed S cells with living R cells.
Avery, MacLeod, McCarty - ANSWER Identified the heritable substance as DNA
Used test tubes- vitro
Hershey and Chase - ANWER did experiments showing that DNA is the genetic material
of a phage called T2
chargaff - ANWER A=T and C=G
Wilkins and Franklin - ANWER X-ray diffraction was used to identify that DNA shape is
helix
Waston and Crick - ANWER Establishment of the current model for DNA double helix
determination of DNA structure
DNA structure - ANSWER polymer of nucleotides, Nitrogenous base, Sugar, Phosphate
group
Nitrogenous bases in DNA - ANSWER adenine=2, guanine=3, cytosine=3, thymine=2
, purine - ANSWER Adenine and Guanine (2 rings)
Pyrimidine - ANSWER cytosine and thymine (single ring)
DNA double helix - ANSWER Bound covalently, linked by phosphodiester bonds
3' - ANSWER 3rd carbon that has a hydroxyl group
5' - ANSWER 5th carbon that has a phosphate group
Centromere - ANSWER joining point for replicated chromatids
Telomere - ANSWER Nucleotide sequence at the end of the chromatids both ends
chromatid - ANSWER 3 billion base pairs packed together
DNA packaging - ANSWER DNA strand to Nucleosome to 30 then looped domains
(10,30,300,700)
10nm fiber - ANSWER Nucleosomes connected by stretches of DNA
Bead formation
30 nm fiber - ANSWER interactions between nucleosomes cause the thin fiber to coil or
fold into this thicker fiber
300 nm fiber - ANSWER The 30-nm fiber forms looped domains that attach to proteins
700 nm fiber - ANSWER looped domains coil further only seen in metaphase
