Plant Physiology Study Notes: Auxin, ABA, Tropisms, and Photosynthesis

Plant Hormones and Growth Responses

1. Auxin (IAA) Precursor

Auxin (IAA) is naturally synthesized from the precursor amino acid tryptophan. Synthetic versions such as NAA, IBA, and 2,4-D are classified as plant growth regulators rather than hormones, because they are not made by the plant.

2. Auxin and Cell Elongation

Auxin increases the concentration of \(H^{+}\) ions in primary cell walls, which activates enzymes that loosen cellulose fibers. Increased turgor pressure then causes the plasticized cell

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Cell Transformation, Cell Culture Techniques & Biosafety Levels Explained

Essay Question: Elaborate on Any Three Methods to Convert Normal Cells into Cancer Cells

Essay question: Elaborate on any three methods to convert normal cells into cancer cells

1. Chemical Carcinogens

Chemical agents trigger cancer by directly damaging DNA and forcing mutations in the specific genes responsible for managing cell division. As these genetic errors pile up, cells completely lose their brakes and begin dividing without limit. Scientists frequently apply these chemicals to cell cultures
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Forensic DNA Analysis and CRISPR Systems: Key Concepts

1) Chelex Extraction Steps

1. Hydration: Submerge the biological stain in sterile water at room temperature for 30 minutes to soften the sample matrix.
2. Debris Removal: Spin down the mixture via centrifugation and discard the substrate carrier (e.g., fabric or swab fragment).
3. Reagent Addition: Introduce the ion-exchange resin (Chelex) along with Dithiothreitol (DTT) and Proteinase K to the remaining cellular pellet.
4. Lysis Incubation: Maintain at 56°C to enzymatically digest cell membranes and
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Apple Flavonoids Suppress Carcinogen-Induced DNA Damage

Apple Flavonoids Suppress Carcinogen-Induced DNA Damage in Human Bronchial Epithelial Cells

The work Apple Flavonoids Suppress Carcinogen-Induced DNA Damage in Normal Human Bronchial Epithelial Cells explores the potential of flavonoids found in apple skins to reduce DNA damage in normal human bronchial epithelial cells induced by carcinogenic chemicals. Genomic instability is a key factor in cancer initiation and progression, so the selection of natural compounds that are able to improve DNA repair

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Controlled Release Drug Delivery Systems and Design

Approaches to Design Controlled Release Formulations

These are the methods or processes by which we design Controlled Release Drug Delivery Systems (CRDDS):

  • 1. Diffusion-controlled release
  • 2. Dissolution-controlled release
  • 3. Ion-exchange controlled release

1) Diffusion-Controlled Release System

Diffusion is the process of movement of drug molecules from a higher concentration to a lower concentration during absorption. For CRDDS, we can control the diffusion process by using polymers. Before polymer

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Essential Biotechnology Concepts and Applications

1) Recombinant DNA (rDNA) Technology & Insulin Preparation

Principle: rDNA technology involves joining DNA molecules from two different species and inserting the resulting hybrid DNA into a host organism to produce new genetic combinations or proteins. It works by isolating the target gene, inserting it into a carrier (vector), and letting the host cell’s machinery read the gene and make the protein.

Role: It allows for the mass production of therapeutic proteins, disease resistance in crops,

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