Definition: Osmosis is the movement of water molecules from an area of higher water concentration to lower concentration through a selectively permeable membrane.

Example: The cell membrane's selective permeability allows it to control which substances enter or exit the cell, maintaining cellular homeostasis.

Highlight: Understanding passive transport is crucial for answering National 5 Biology unit 1 questions and answers related to cellular processes.

Example: Oxygen diffusing from the lungs into the bloodstream is an example of diffusion in the human body.

Vocabulary: Complementary base pairing refers to the specific matching of DNA bases: A with T, and G with C.

Highlight: The structure and function of DNA are crucial concepts for understanding genetics and heredity in National 5 Biology.

Example: Hemoglobin in red blood cells is a protein that carries oxygen throughout the body.

Highlight: Understanding protein functions is essential for answering National 5 Biology quiz questions on molecular biology and genetics.

Definition: Messenger RNA (mRNA) is a single-stranded RNA molecule that carries genetic information from DNA to the ribosomes for protein synthesis.

Highlight: Understanding mRNA function is crucial for grasping the concept of gene expression in Nat 5 Biology.

Vocabulary: Substrate refers to the molecule upon which an enzyme acts.

Example: The breakdown of starch into glucose by amylase is an example of a Degradation reaction enzyme.

Definition: Genetic engineering is the process of manipulating an organism's genes using biotechnology.

Highlight: Understanding the Stages of genetic engineering is crucial for National 5 Biology assignment examples related to biotechnology.

Vocabulary: ATP (Adenosine Triphosphate) is the energy currency of the cell.

Highlight: Understanding the differences between aerobic respiration and fermentation is crucial for answering National 5 Biology unit 1 questions and answers on cellular metabolism.

Vocabulary: Organelles are specialized structures within cells that perform specific functions.

Highlight: Understanding the differences between cell types is crucial for National 5 Biology quiz questions and exams.