CLT-102 IGNOU Solved Assignment 2026-27

CLT-102 Solved Assignment 2026-27 (TMA) Laboratory Techniques in Biology

The following content aligns with the IGNOU School of Sciences (SOS) curriculum for CLT-102, focusing on verified solutions for the TMA (30% weightage). All answers adhere to word limits (500/250/100 words) and academic integrity standards.

Key Syllabus Units Covered

• Block-1: Introduction to Biology Laboratory
  • Laboratory Safety and Ethics: Detailed protocols for handling biological specimens, chemical safety, and waste disposal as per Council of Scientific and Industrial Research (CSIR) guidelines.
  • Basic Microscopy Techniques: Step-by-step procedures for preparing slides (wet mount, squash, and stained), calibration of microscopes, and resolving power calculations.
  • Introduction to Experimental Design: Hypothesis formulation, variable identification, and control group setup for biological experiments.
• Block-2: Laboratory Techniques
  • Centrifugation and Filtration: Principles of differential centrifugation, rotor selection, and membrane filtration for cell separation and purification.
  • Molecular Biology Techniques: PCR amplification protocols, gel electrophoresis (agarose/acrylamide), and DNA/RNA quantification using spectrophotometry.
  • Cell Culture and Maintenance: Aseptic techniques, media preparation (e.g., DMEM, RPMI), and monitoring cell viability via trypan blue exclusion.

Sample Solution Structure (Block-1: 500 words)

Question 1: Describe the steps involved in preparing a temporary mount of an onion peel for microscopic examination.

1. Select a fresh onion bulb and peel off a thin, transparent layer from the inner scale.
2. Place the peel in a drop of distilled water or 1% hydrochloric acid (for cell wall clarification) on a clean slide.
3. Gently tease the peel with forceps to separate individual cells, then cover with a 22x22 mm coverslip.
4. Apply gentle pressure using absorbent paper to remove air bubbles, ensuring even light transmission.
5. Examine under a compound microscope at 40x magnification, noting cell wall thickness and nucleus position.

FAQs

Solutions are available in both English and Hindi, strictly following the IGNOU 2026-27 curriculum for CLT-102. Word limits and formatting (e.g., 500 words for Block-1) are strictly enforced.

All answers are cross-referenced with the official IGNOU eGyanKosh syllabus and past TMA guidelines. Solutions include step-by-step procedures, scientific citations (e.g., CSIR protocols), and word-count compliance labels for each question.

Submission Deadlines (2026-27)

• TMA-02 (Block-1 + Block-2): Last date: 31st July 2027 (for July session students).
• Submission Portal: https://lms.ignou.ac.in (via IGNOU Student Portal).
• File Format: PDF only (max 1MB), named as CLT-102_TMA_[RollNo]_2026-27.pdf.

Note: Plagiarism checks are conducted via Turnitin; solutions provided here are 100% original and free of copied content.