Lesson Notes By Weeks and Term v4 - SHS 2
CELL STRUCTURE AND FUNCTIONS
Download the Lessonotes Mobile Ghana app for faster lesson access on Android and iPhone.
CELL STRUCTURE AND FUNCTIONS
Download the Lessonotes Mobile Ghana app for faster lesson access on Android and iPhone.
Subject: Biology
Class: SHS 2
Term: 1st Term
Week: 20
Grade code: 2.2.2.LI.1
Strand code: 2
Sub-strand code: 2
Content standard code: 2.1.2.CS.1
Indicator code: 2.2.2.LI.1
Theme: LIFE IN THE FUNDAMENTAL UNIT
Subtheme: CELL STRUCTURE AND FUNCTIONS
This page supports the lesson note with a companion video and a short classroom-ready summary.
For class groups and homework, share this lesson page so learners also get the summary, objectives, and full lesson context.
This lesson delves into the very "blueprint of life" – nucleic acids. We will explore Deoxyribonucleic Acid (DNA) and Ribonucleic Acid (RNA), the molecules that store and transmit the genetic information that makes every living thing unique. Think of DNA as the master cookbook in the cell's nucleus, containing all the recipes (genes) to build and operate an entire organism. In Ghana, understanding DNA helps us comprehend hereditary traits like family resemblance, why certain genetic diseases like sickle-cell anaemia are prevalent, and how modern agriculture is improving our crops like cassava and maize. By understanding this molecular structure, we unlock the secrets of life itself.
2.1. What are Nucleic Acids? The Building Blocks
Nucleic acids are large biological molecules (macromolecules) that are essential for all known forms of life. They carry the genetic instructions for the development, functioning, growth, and reproduction of all organisms.
The two main types are: DNA (Deoxyribonucleic Acid) RNA (Ribonucleic Acid)
Both DNA and RNA are polymers, meaning they are long chains made up of repeating smaller units called monomers. The monomer of a nucleic acid is a nucleotide.