BiologyFundamental ConceptNCTB জীববিজ্ঞান অধ্যায় ১২ (জীবের বংশগতি ও বিবর্তন)
DNA (Deoxyribonucleic Acid)
Bengali: ডিএনএ ও বংশগতি•Pronunciation: ডিঅক্সিরাইবোনিউক্লিক এসিড•Symbol: \text{DNA}
Standard Definition:
A double-stranded helical biopolymer that carries the genetic blueprint for the development, functioning, growth, and reproduction of all known organisms.
📐 Mathematical Equation, Units & Dimensions
Defining Mathematical Equation
Standard SI Unit
Dalton (Da / kDa)(আণবিক ভর: ডাল্টন ($Da$ বা $kDa$))
Dimensional Analysis
CGS Unit
None
📖 Physical Concept & Comprehensive Explanation
Formulated by Watson and Crick in 1953, DNA consists of antiparallel nucleotide strands forming a right-handed double helix. Base pairing follows strict hydrogen-bond complementarity: Adenine pairs with Thymine (A=T), and Guanine pairs with Cytosine (G=C).
🎯 High-Yield Revision Points
- ✓The primary carrier of hereditary information across generations.
- ✓Complementary base pairing: A=T (2 H-bonds) and G=C (3 H-bonds).
- ✓Helix diameter is 2.0 nm, with a pitch of 3.4 nm per complete turn.
Use Online Solver for DNA (Deoxyribonucleic Acid)
Compute step-by-step solutions, verify formulas, and plot interactive diagrams on biggan.me.
❓ Frequently Asked Exam Questions (FAQ)
Common questions in board and competitive entrance examinations
Q1: What are the 4 nitrogenous bases of DNA?
Adenine (A), Thymine (T), Guanine (G), and Cytosine (C).