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Biology Essentials for Teens

Biology

A collection of foundational biology facts covering genetics, cellular structure, human anatomy, and ecology.

science education biology
15 Questions Easy Ages 13+ Jul 30, 2026
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About this Study Set

This study set covers Biology through 15 practice questions. A collection of foundational biology facts covering genetics, cellular structure, human anatomy, and ecology. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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Browse all 15 questions from the Biology Essentials for Teens study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 Which organelle is known as the powerhouse of the cell?
  • A Nucleus
  • B Mitochondria
  • C Ribosome
  • D Golgi apparatus
2 What is the basic unit of life in all living organisms?
  • A Tissue
  • B Organ
  • C Cell
  • D Atom
3 Which molecule carries the genetic instructions for the development and function of living things?
  • A RNA
  • B Protein
  • C Lipid
  • D DNA
4 What process do plants use to convert sunlight into chemical energy?
  • A Respiration
  • B Photosynthesis
  • C Fermentation
  • D Transpiration
5 In human biology, which blood cells are responsible for fighting infections?
  • A Red blood cells
  • B Platelets
  • C White blood cells
  • D Plasma
6 Which gas do humans exhale as a waste product of cellular respiration?
  • A Oxygen
  • B Carbon dioxide
  • C Nitrogen
  • D Hydrogen
7 What is the primary function of the human heart?
  • A Digesting food
  • B Filtering waste
  • C Pumping blood
  • D Producing hormones
8 Which part of a plant typically absorbs water and nutrients from the soil?
  • A Leaves
  • B Stem
  • C Flower
  • D Roots
9 How many chromosomes are typically found in a standard human cell nucleus?
  • A 23
  • B 46
  • C 12
  • D 64
10 Which kingdom do mushrooms belong to?
  • A Plantae
  • B Animalia
  • C Fungi
  • D Protista
11 What is the largest organ in the human body?
  • A Liver
  • B Brain
  • C Skin
  • D Lungs
12 Which substance gives plants their green colour?
  • A Chlorophyll
  • B Carotene
  • C Melanin
  • D Haemoglobin
13 What is the main purpose of the digestive system?
  • A To pump blood
  • B To break down food into nutrients
  • C To exchange gases
  • D To protect the body
14 Which type of organism consists of only one cell?
  • A Multicellular
  • B Unicellular
  • C Vertebrate
  • D Mammal
15 What is the scientific term for an animal that eats only plants?
  • A Carnivore
  • B Omnivore
  • C Herbivore
  • D Decomposer
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