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BCH5413 Exam 1 (250+ Questions) DNA Structure, PCR, Cloning, Gene Expression & Molecular Biology Techniques

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Prepare effectively for BCH5413 Exam 1 with this comprehensive collection of more than 250 exam questions and verified answers covering the core principles of biochemistry and molecular biology. This study resource provides detailed coverage of DNA and RNA structure, nucleic acid chemistry, DNA replication, alternative DNA conformations, supercoiling, DNA-protein interactions, gene expression analysis, molecular cloning, recombinant DNA technology, PCR applications, mutagenesis techniques, protein expression systems, and advanced laboratory methodologies used in modern biomedical research. The material includes extensive review of Southern, Northern, and Western blotting, RT-PCR, quantitative PCR (qPCR), microarray analysis, cloning vectors, genomic and cDNA library construction, chromosome walking, reporter gene assays, chromatin immunoprecipitation (ChIP), electrophoretic mobility shift assays (EMSA), and protein purification strategies. Students will also find detailed explanations of restriction enzymes, plasmid biology, bacterial transformation, blue-white screening, TOPO cloning, shuttle vectors, site-directed mutagenesis, and recombinant protein production in both bacterial and mammalian expression systems. The content aligns closely with foundational concepts presented in leading molecular biology and biochemistry references, including: Alberts B. et al., Molecular Biology of the Cell, Garland Science. Watson J.D. et al., Molecular Biology of the Gene, Pearson. Berg J.M., Tymoczko J.L., Gatto G.J., Stryer Biochemistry, W.H. Freeman. Lodish H. et al., Molecular Cell Biology, W.H. Freeman. Green M.R. & Sambrook J., Molecular Cloning: A Laboratory Manual, Cold Spring Harbor Laboratory Press. This document is particularly valuable for undergraduate and graduate students enrolled in Biochemistry, Molecular Biology, Biomedical Sciences, Biotechnology, Genetics, Pre-Medicine, Pre-Dentistry, Pharmacy, Veterinary Medicine, and related life science programs. It serves as an excellent revision tool for midterms, final examinations, competency assessments, laboratory practicals, and standardized biomedical science examinations. The question-and-answer format promotes active recall and self-testing, enabling students to identify knowledge gaps and strengthen their understanding of complex molecular mechanisms. Whether used as a primary review guide or as a supplement to lecture notes and textbooks, this resource provides a structured and efficient approach to mastering BCH5413 course content and achieving success on Exam 1. Keywords DNA structure, RNA structure, nucleic acids, Chargaff rule, DNA replication, semi-conservative replication, DNA supercoiling, DNA melting, DNA hybridization, DNA binding proteins, zinc finger proteins, RNA secondary structure, tRNA structure, Southern blot, Northern blot, Western blot, gel electrophoresis, restriction enzymes, restriction endonucleases, PCR, polymerase chain reaction, RT-PCR, qRT-PCR, quantitative PCR, TaqMan assay, SYBR Green, gene expression analysis, microarray analysis, cDNA microarray, oligonucleotide microarray, genomic DNA, cloning vectors, plasmids, bacterial transformation, blue white screening, TOPO cloning, cDNA library, genomic library, chromosome walking, reporter genes, luciferase assay, ChIP assay, chromatin immunoprecipitation, EMSA, DNA affinity purification assay, site directed mutagenesis, QuikChange mutagenesis, inverse PCR, recombinant DNA technology, protein expression, protein purification, GST fusion proteins, molecular cloning, biotechnology, molecular genetics, biochemistry exam questions, molecular biology exam preparation, laboratory techniques, biomedical sciences, University of Florida, BCH5413

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BCH5413 Exam 1 2026 Exam
Questions and Correct
Answers | New Update



DNA structure - ANSWER ✔✔- nucleic acid bases (purine (A,G) and

pyrimidine (C,U,T))

- sugars (ribose, deoxyribose)

- sugars linked by phosphate groups (sugar-phosphate backbone)




*form antiparallel strands

,In mammilian DNA, which base has various forms - ANSWER

✔✔cytosine


Chargaff's rule - ANSWER ✔✔A=T and C=G


Is DNA conservative or semi-conservative? - ANSWER ✔✔semi-

conservative

- parental sequence and daughter strand bind together

Alternative Double stranded DNA conformation


- A and Z DNA - ANSWER ✔✔A DNA


- dehydrated form

- right handed helix

- 11 bp per helical

- bp tilted 19 degrees

- major groove narrow and deep

- found with dsRNA and RNA-DNA duplex




z-DNA

- >1% of cellular DNA

,- favored by G-C repeats and alternating purines-pyrimidines

- left handed helix

- 12 bp per turn

- bp tilted 9 degrees

- major groove flattened, nearly gone

- bound by poxvirus E3L virulence factor and down regulates apoptosis

genes

Non-duplex DNA structures


- cruciform DNA - ANSWER ✔✔- inverted repeat sequence


- favored by excessive negative supercoiling

- AT-rich cruciforms associated with 'fragile' DNA


Alternative modes of base pairing - ANSWER ✔✔Watson Crick:


A--T and C---G

- adenine is at anti-conformation




Hoogsteen:

- adenine or guanine can be flipped to sin-conformation (different H-

bonding)

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, Hoogsteen base pairing


- when can it occur - ANSWER ✔✔- in triplex and quadruplex DNA

structures


Triplex DNA - ANSWER ✔✔- pyrimidine rich strand


- negative supercoiling


Chair DNA - ANSWER ✔✔- two G-rich strands


- down regulation of c-myc transcription


Intrinsic Bends in DNA - ANSWER ✔✔- distortion of the ideal B-DNA

conformation resulting from base stacking in the nucleotide sequence

Eg. Adenine-tract DNA results in 20 degree bends




- also can be found in duplex-oligonucleotide model DNA

- causes 23 degree bend and mis-stacking of one GC

- DNA is not a uniform structure


Does B-DNA have a perfect structure? - ANSWER ✔✔No


- sequence specific local variation in twist between paired bases, sugat

conformation, tilt of base pairs, rise distance, etc.

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