Biology multiple choice questions: 20-question practice quiz
Quick quiz to practice biology questions with answers. Instant results.
Editorial: Review CompletedUpdated Aug 28, 2025
This quiz helps you practice biology multiple choice questions and check your understanding for Grade 10. Work through 20 quick items on cells, genetics, and body systems, then view instant results to spot what to review next. For more practice, try our grade 10 biology quiz, explore a cell quiz with answers, or focus on homeostasis practice questions.
Study Outcomes
- Understand fundamental biological concepts and terminology.
- Analyze key biological processes through rapid-fire questioning.
- Apply biological principles to multiple-choice problems effectively.
- Evaluate personal knowledge to identify areas for improvement.
- Enhance test-taking confidence with timed practice scenarios.
Multiple Choice Biology Quiz Review Cheat Sheet
- Understand the characteristics of living organisms - Living things share some superpowers: they're made of cells, require energy, maintain a stable internal balance (homeostasis), grow and develop, reproduce, respond to stimuli, and evolve over time. Tick off all these traits and you'll know you're looking at something alive, not a rock or a robot!
- Familiarize yourself with the levels of biological organization - Think of life as a set of nested dolls: atoms form molecules, which build cells, tissues, organs, and organ systems, leading up to organisms. Zoom out further to see populations, communities, ecosystems, and finally the entire biosphere. Understanding this hierarchy helps you appreciate how each level contributes to the big-picture drama of life.
- Grasp the fundamentals of cell theory - Cells are the ultimate building blocks of life. Remember the three golden rules: all living things are made of cells, cells are the basic unit of structure and function, and every cell comes from a pre-existing cell. This simple trio of ideas forms the bedrock of modern biology.
- Differentiate between prokaryotic and eukaryotic cells - Prokaryotes (like bacteria) are minimalists with no nucleus or membrane-bound organelles, while eukaryotes (plants, animals, fungi, and protists) boast a nucleus and specialized compartments. Think of prokaryotes as a cozy studio apartment, and eukaryotes as a multi-room mansion. Recognizing these differences is key to understanding cell diversity.
- Learn the key organelles and their functions - Every cell is a bustling factory with organelles as its machines: the nucleus stores DNA, mitochondria power the cell with ATP, ribosomes craft proteins, the endoplasmic reticulum and Golgi apparatus process and ship molecules, lysosomes handle waste, chloroplasts capture sunlight, and the cell membrane sets security checkpoints. Mastering this lineup will help you ace organelle labeling!
- Understand DNA structure - DNA is a twisted ladder (double helix) made of nucleotides: each "rung" has a sugar, a phosphate group, and one of four nitrogenous bases (adenine, thymine, cytosine, or guanine). Base-pairing rules (A with T, C with G) ensure the code is copied accurately. Grasping this structure is essential for learning how genetic information is stored and replicated.
- Comprehend the central dogma of molecular biology - The central dogma is biology's translation service: DNA is transcribed into RNA in the nucleus, then RNA is translated into proteins in the cytoplasm. It's like making a photocopy of a secret recipe (transcription) and then baking the cake (translation). Nail this process and you'll understand how genes become traits!
- Master Mendelian genetics - Mendel's laws explain how traits pass from parents to offspring: the law of segregation says each parent contributes one allele, and the law of independent assortment means genes for different traits segregate independently. These principles lay the groundwork for classic inheritance patterns and set you up to rock those Punnett squares.
- Practice using Punnett squares to predict genotypes and phenotypes - Punnett squares are your predictive crystal ball: just plug in parental alleles, map the possible combinations, and forecast offspring traits for monohybrid and dihybrid crosses. The more you practice, the faster you'll decode genetic outcomes like a pro geneticist!
- Recognize the evidence for evolution - Evolutionary clues are everywhere: fossil records show life's timeline, comparative anatomy spotlights homologous and vestigial structures, molecular biology reveals DNA similarities, and embryology uncovers shared developmental stages. Piecing together these lines of evidence tells the epic story of how life on Earth has changed over billions of years.
