2026 ATI TEAS Test -- Science Practice Questions and answers

Which organ system is primarily responsible for transporting oxygen and nutrients throughout the body? A Respiratory system B Circulatory system C Digestive system D Nervous system ️️ B Circulatory system What is the basic unit of life? A Tissue B Organ C Cell D Organ system ️️ C Cell Which part of the cell controls genetic material? A Ribosome B Nucleus C Golgi apparatus D Mitochondria ️️ B Nucleus What is the primary function of red blood cells? A Fight infection B Carry oxygen C Produce hormones D Digest food ️️ B Carry oxygen Which molecule stores energy in cells? A DNA B ATP C RNA D Glucose ️️ B ATP What is the process by which plants make food? A Respiration B Fermentation C Photosynthesis 2 D Digestion ️️ C Photosynthesis Which organ is responsible for filtering blood? A Heart B Liver C Kidney D Lung ️️ C Kidney What type of joint is found in the elbow? A Ball and socket B Hinge C Pivot D Saddle ️️ B Hinge Which system includes the brain and spinal cord? A Endocrine system B Nervous system C Muscular system D Skeletal system ️️ B Nervous system What is the function of white blood cells? A Transport oxygen B Fight infection C Clot blood D Carry nutrients ️️ B Fight infection Which biomolecule is the main source of quick energy? A Lipids B Proteins C Carbohydrates D Nucleic acids ️️ C Carbohydrates What is the largest organ in the human body? A Liver B Skin C Brain D Heart ️️ B Skin 3 Which process breaks food into smaller molecules? A Respiration B Digestion C Circulation D Excretion ️️ B Digestion What is homeostasis? A Growth of organisms B Maintenance of stable internal conditions C Reproduction process D Mutation process ️️ B Maintenance of stable internal conditions Which gas is required for cellular respiration? A Carbon dioxide B Oxygen C Nitrogen D Hydrogen ️️ B Oxygen What is the function of mitochondria? A Protein synthesis B Energy production C Lipid storage D DNA storage ️️ B Energy production Which blood component helps in clotting? A Plasma B Platelets C Red blood cells D White blood cells ️️ B Platelets What is the smallest bone in the human body? A Femur B Stapes C Tibia D Radius ️️ B Stapes Which part of the brain controls balance? A Cerebrum B Cerebellum 4 C Medulla D Hypothalamus ️️ B Cerebellum What is the function of the lungs? A Pump blood B Filter toxins C Exchange gases D Digest food ️️ C Exchange gases Which macromolecule contains amino acids? A Lipids B Proteins C Carbohydrates D DNA