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#biological research

3 public questions tagged with this topic.

Animal Tissue Culture 2

Macroculture is preferred when:

Macroculture denotes large-scale culture formats including T-75 and T-175 flasks, roller bottles, multi-tray CellSTACKs and Cell Factories, and stirred-tank bioreactors producing volumes from hundreds of milliliters to thousands of liters. Preferred when substantial cell biomass required for downstream processing such as purification of therapeutic recombinant proteins like erythropoietin, monoclonal antibodies from CHO cells, viral vectors for gene therapy, vaccine virus harvest from Vero, or preparation of whole cell lysates for proteomics and metabolomics. Macro scale enables control over d

Ref: Freshney Ch.27 Scale-up macroculture; Wurm Nat Biotechnol 2004 Production of recombinant proteins in CHO large scale.

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Molecular Marker

Which pair of markers are used to study both structure and function?

Functional and structural genomics require complementary marker resources for integrated analysis. Expressed Sequence Tags derived from cDNA provide evidence of actively expressed genes, enabling functional annotation, tissue-specific expression profiling and identification of conserved coding regions for comparative mapping. Variable Number Tandem Repeats and related tandem repeat families reveal chromosome architecture, heterochromatin organization, high polymorphism and linkage relationships for structural mapping. Combining VNTR for structural diversity assessment and EST for gene function

Ref: NCERT Biology Class XII Principles on Klenow fill-in labeling, Lehninger Chapter 9 DNA cloning techniques, and Molecular Cloning by Sambrook Chapter 10 documenting end-labeling of cohesive termini.

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Radioisopes and Field Biology methods

Which isotope is best used for studying protein synthesis with sulfur?

Sulfur constitutes cysteine and methionine residues, essential for disulfide bonds and enzyme active sites, making sulfur tracking ideal for protein synthesis studies. Sulfur-35 is chemically identical to natural sulfur, emits moderate beta particles easily detected without excessive radiation damage, and half-life of 87 days allows pulse-chase labeling. Phosphorus-32 labels nucleic acids preferentially, tritium and carbon-14 label broadly all macromolecules lacking specificity for sulfhydryl amino acids. Incorporation of labeled methionine containing sulfur-35 into nascent polypeptides direct

Ref: NCERT Biology Class XII Principles on Klenow fill-in labeling, Lehninger Chapter 9 DNA cloning techniques, and Molecular Cloning by Sambrook Chapter 10 documenting end-labeling of cohesive termini.

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