If you are a Class 12 (HSSC-II) FBISE student, these handwritten notes for Chemistry Chapter 15: Biochemistry are prepared according to the new FBISE National Curriculum (2022–2023) and current board exam requirements.
The notes focus on important biomolecules such as carbohydrates, proteins, enzymes, lipids, and nucleic acids, along with their classifications, structures, and functions, which are frequently tested in short questions and conceptual questions in FBISE exams. You can download the complete handwritten notes from the link provided under the Download section at the end of this post.
Chapter Overview: Biochemistry
Biochemistry is the branch of chemistry that deals with the chemical substances present in living organisms and the reactions that take place within them. This chapter explains the composition, structure, classification, and functions of major biomolecules essential for life.
This chapter is mainly theory-based and is considered an important and scoring chapter if prepared properly.
Topics Covered
The following exam-relevant topics are covered in these notes: carbohydrates, classification of carbohydrates, proteins, structure-based classification, classification of proteins based on constitution, classification of proteins based on shapes, classification of proteins on the basis of functions, enzymes, role of enzymes as biocatalysts, factors affecting enzyme activity, role of inhibitors in enzyme-catalyzed reactions, lipids, classification of lipids, classification of lipids based on chemical structure, classification of lipids on the basis of function, classification of lipids on the basis of physical characteristics, essential lipids, non-essential lipids, nucleic acids, types of nucleic acids, structural components of DNA and RNA, difference between RNA and DNA, structure of DNA, and structure of RNA.
Important Concept Explanations
Carbohydrates: Carbohydrates are organic compounds made up of carbon, hydrogen, and oxygen. They are an important source of energy for living organisms. Their classification includes monosaccharides, disaccharides, and polysaccharides.
Proteins: Proteins are complex biomolecules made up of amino acids. They are classified on the basis of structure, constitution, shape, and function. This classification is important for short and long board questions.
Enzymes: Enzymes are biological catalysts that speed up chemical reactions in living organisms without being consumed. Their activity is affected by temperature, pH, substrate concentration, and inhibitors.
Lipids: Lipids are organic compounds such as fats and oils that are insoluble in water. They are classified on the basis of chemical structure, function, and physical characteristics.
Nucleic Acids: Nucleic acids are naturally occurring biomolecules that carry genetic information in living cells. Their two main types are DNA and RNA.
DNA and RNA: The structure, components, and differences between DNA and RNA are important board exam topics. DNA stores genetic information, while RNA helps in protein synthesis.
Why These Notes Are Helpful
Covers only FBISE exam-oriented content, easy language for quick memorization, helpful for short and conceptual questions, clear classifications and structural differences, and written in a student-friendly format.
Download/View Class 12 Chemistry Notes – Chapter 15 Biochemistry
Final Tip for the Students
This chapter contains many classifications and definitions, so focus on learning headings and differences clearly, especially between DNA and RNA, types of proteins, and lipid classifications. Well-structured answers with proper classifications can help you secure full marks in FBISE exams.
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