Exam (elaborations)
Bio 219 Exam 2 Questions And Answers Latest Update
- Course
- BIO 219
- Institution
- Purdue University
Bio 219 Exam 2 Questions And Answers Latest Update
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Bio 219 Exam 2 Questions AndAnswers Latest Update
Individual repeats can be > 1000bp long
Mostly made of transposons --- known as Jumping genes Answer:
Darwin and Wallace both develop theory of what Answer: "Descent with
modification"
A molecular basis for evolution Answer: The genetic code
"Central dogma" = DNA to RNA to Proteins
Structure of DNA Answer: 2' structure: double helix
What are the building blocks of DNA? Answer: Nucleotides
Rosalind Franklin found what Answer: 1) DNA was helical
2) The sugar-phosphate backbone was probably on the outside
3) DNA probably has a uniform diameter
Most double-stranded DNA in the cell is what Answer: B-DNA
, Many DNA binding proteins interact with what Answer: the major groove of
B-DNA
DNA Binding Proteins have specialized motifs for interacting with DNA like what
Answer: 1) Helix-turn-helix
2) Leucine Zipper
3) Helix-loop-helix
Helix-turn-helix Answer: ~ 20 aa long
2 helices + short turn
2nd helix recognizes major groove
e.g. Lac Repressor
Leucine Zipper Answer: Leu every 7th aa
Dimers + coiled structure
Basic aa's recognize major groove
e.g. CREB
Helix-loop-helix Answer: 2 helices + loop
Dimers w. 4 helix bundle
Extended helix binds major groove
E.g. Myc
Some enzymes like what can open the helix Answer: RNA polymerase
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