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National 5 Biology Revision Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What is the role of mitochondria in a cell?✔✔To produce energy in the form of ATP through cellular respiration
What is the function of the cell membrane?✔✔To control the movement of substances in and out of the cell
What is the process of osmosis?✔✔The movement of water molecules from an area of high concentration to an area of low concentration through a selectively permeable membrane
What is the difference between prokaryotic and eukaryotic cells?✔✔Prokaryotic cells do not have a nucleus or membrane-bound organelles, while eukaryotic cells do
What is the function of chloroplasts in plant cells? 1 / 3
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✔✔To carry out photosynthesis, converting sunlight into chemical energy
What is the purpose of enzymes in biological processes?✔✔To speed up chemical reactions by lowering the activation energy
What is the process of photosynthesis?✔✔The process by which plants use sunlight, carbon dioxide, and water to produce glucose and oxygen
What is the function of ribosomes in a cell?✔✔To synthesize proteins by translating messenger RNA into amino acid sequences
What is the role of the nucleus in a cell?✔✔To store the cell’s genetic material and coordinate cell activities, such as growth and reproduction
What is a gene?✔✔A section of DNA that codes for a specific protein or function 2 / 3
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What is the purpose of mitosis?✔✔To produce two identical daughter cells for growth, repair, and asexual reproduction
What is the difference between mitosis and meiosis?✔✔Mitosis results in two identical cells, while meiosis produces four genetically unique cells for sexual reproduction
What are the building blocks of proteins?✔✔Amino acids
What is the role of DNA in genetics?✔✔DNA carries the genetic information that is passed from one generation to the next
What is an allele?✔✔An alternative form of a gene that can produce different traits
What is the difference between dominant and recessive alleles?
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