BiologyChapter 13: Chromosome and DNA
DNA Structure (watson-Crick School) — Complement
Template CATG -> GTAC on the other DNA strand.
Learning objectives
- Define complement using accurate biology terms.
- Explain why complement matters within dna structure (watson-crick school).
- Apply the learning unit to an FBISE-style example, comparison, diagram, or calculation.
Definition
Template CATG -> GTAC on the other DNA strand. For RNA transcript, T becomes A and A becomes U. Diameter uniform because A-T and G-C pairs fit. Template strand read 3' to 5'; new strand built 5' to 3'. mRNA uses U instead of T when copying from DNA template. One gene → one mRNA → one polypeptide (usually). This page separates the idea from the wider topic “DNA STRUCTURE (WATSON-CRICK SCHOOL)” so it can be revised and assessed on its own.
Important terms
- COMPLEMENT
- Template CATG -> GTAC on the other DNA strand.
- DNA STRUCTURE (WATSON-CRICK SCHOOL)
- DNA is a double helix.
Overview
Study this learning unit in three steps:
Key Idea
Template CATG -> GTAC on the other DNA strand. For RNA transcript, T becomes A and A becomes U. Diameter uniform because A-T and G-C pairs fit. Template strand read 3' to 5'; new strand built 5' to 3'. mRNA uses U instead of T when copying from DNA template. One gene → one mRNA → one polypeptide (usually).
Examples A <-> T · G <-> C · A -> U in RNA
Exam Application
Worked complement. Template: A G C T A DNA partner: T C G A T mRNA from template: U C G A U
Examples A <-> T · G <-> C · A -> U in RNA
WHAT — DNA STRUCTURE (WATSON-CRICK SCHOOL) — COMPLEMENT
Template CATG -> GTAC on the other DNA strand. For RNA transcript, T becomes A and A becomes U. Diameter uniform because A-T and G-C pairs fit. Template strand read 3' to 5'; new strand built 5' to 3'. mRNA uses U instead of T when copying from DNA template. One gene → one mRNA → one polypeptide (usually). This page separates the idea from the wider topic “DNA STRUCTURE (WATSON-CRICK SCHOOL)” so it can be revised and assessed on its own.
WHY — Why this topic matters
DNA STRUCTURE (WATSON-CRICK SCHOOL) — COMPLEMENT is an independent FBISE learning unit because students must connect its structures and processes with their biological functions and examples.
HOW — How it works
Template CATG -> GTAC on the other DNA strand. For RNA transcript, T becomes A and A becomes U. Diameter uniform because A-T and G-C pairs fit. Template strand read 3' to 5'; new strand built 5' to 3'. mRNA uses U instead of T when copying from DNA template. One gene → one mRNA → one polypeptide (usually). Examples: A <-> T; G <-> C; A -> U in RNA. Exam use: Worked complement. Template: A G C T A DNA partner: T C G A T mRNA from template: U C G A U
Explanation
Template CATG -> GTAC on the other DNA strand. For RNA transcript, T becomes A and A becomes U. Diameter uniform because A-T and G-C pairs fit. Template strand read 3' to 5'; new strand built 5' to 3'. mRNA uses U instead of T when copying from DNA template. One gene → one mRNA → one polypeptide (usually). Examples: A <-> T; G <-> C; A -> U in RNA. Exam use: Worked complement. Template: A G C T A DNA partner: T C G A T mRNA from template: U C G A U
In simple words
Federal Board Class 11 Biology learning unit. Easy wording; no provincial-board material added.
Key points
- pair rules
- TU swap on RNA
Exam preparation
Exam Focus
Quick revision
Revision Zone
Review the key facts, formulas and checks before you move on.DNA Structure (watson-Crick School) — Complement
Sticky Notes · Quick Revision
Core idea
- Template CATG -> GTAC on the other DNA strand. For RNA transcript, T becomes A and A becomes U. Diameter uniform because A-T and G-C pairs fit. Template strand read 3' to 5'; new strand built 5' to 3'. mRNA uses U instead of T when copying from DNA template. One gene → one mRNA → one polypeptide (usually). This page separates the idea from the wider topic “DNA STRUCTURE (WATSON-CRICK SCHOOL)” so it can be revised and assessed on its own.
WHAT
- Template CATG -> GTAC on the other DNA strand.
WHY
- DNA STRUCTURE (WATSON-CRICK SCHOOL) — COMPLEMENT is an independent FBISE learning unit because students must connect its structures and processes with their biological functions and examples.
HOW
- Template CATG -> GTAC on the other DNA strand. For RNA transcript, T becomes A and A becomes U. Diameter uniform because A-T and G-C pairs fit. Template strand read 3' to 5'; new strand built 5' to 3'. mRNA uses U instead of T when copying from DNA template. One gene → one mRNA → one polypeptide (usually). Examples: A <-> T; G <-> C; A -> U in RNA. Exam use: Worked complement. Template: A G C T A DNA partner: T C G A T mRNA from template: U C G A U
Common misconception
- Do not treat complement as the same as every other part of dna structure (watson-crick school); define this unit and use its own evidence, steps, or conditions.
FBISE exam check
- Define dna structure (watson-crick school) — complement, explain how it works, and support the answer with one relevant example.
60-second revision
- Template CATG -> GTAC on the other DNA strand.
- A <-> T
- Exam link: pair rules.
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