BIOLOGY MCQS
Which is the largest organ in the human body?Heart Liver Skin Lungs C) Skin Skin is the largest organ, covering the whole body.
Which part of the plant conducts photosynthesis?RootStem Leaf FlowerC) LeafLeaves contain chlorophyll for photosynthesis.
Which blood cells help in clotting?Red blood cellsWhite blood cells Platelets Plasma C) Platelets Platelets are responsible for blood clotting.
What is the basic unit of life?OrganTissue CellOrgan system C) CellThe cell is the structural and functional unit of life.
Which gas do plants absorb from the atmosphere? Oxygen Carbon dioxide Nitrogen HydrogenB) Carbon dioxide Plants take in COâ‚‚ for photosynthesis.
What is the powerhouse of the cell? NucleusRibosomeMitochondria Lysosome: C) Mitochondria Mitochondria produce energy (ATP) for the cell.
Which organ purifies blood in humans? Heart LiverKidney Lungs C) KidneyKidneys filter waste from the blood.
Which vitamin is produced in human skin by sunlight? Vitamin A Vitamin BVitamin CVitamin DD) Vitamin DSunlight helps synthesize Vitamin D in the skin.
. Which part of the brain controls balance?CerebrumCerebellumMedullaPonsB) Cerebellum: The cerebellum manages body balance and coordination
What is the normal body temperature of a human? 96.4°F97.5°F98.6°F100°F C) 98.6°FThe average human body temperature is 98.6°F (37°C).
Which blood group is called the universal donor?ABAB O D) O Blood group O can donate to all other groups.
Which is the longest bone in the human body? Tibia Femur HumerusRadius: B) FemurThe femur (thigh bone) is the longest bone.
. What is the main function of white blood cells?Carry oxygenClot bloodFight infectionStore fatC) Fight infectionWBCs protect the body from infections.
Which plant tissue transports water?Phloem XylemParenchymaCollenchymaB) XylemXylem carries water and minerals upward in plants.
What is the process of breathing out called?Inhalation Exhalation Respiration Photosynthesis B) Exhalation Breathing out air is called exhalation.
What is the powerhouse of the cell?NucleusRibosomeMitochondrionEndoplasmic ReticulumC) MitochondrionThe mitochondria are responsible for generating most of the cell's supply of adenosine triphosphate (ATP), which is used as a source of chemical energy, hence the name "powerhouse."
What is the process by which plants make their own food?RespirationTranspirationPhotosynthesisFermentationC) PhotosynthesisPhotosynthesis is a process used by plants and other organisms to convert light energy into chemical energy, which is then used to fuel the organisms' activities.
Which part of the blood is responsible for clotting?Red blood cellsWhite blood cellsPlasmaPlatelets D) PlateletsPlatelets, also known as thrombocytes, are small, colorless cell fragments in our blood that form clots and stop or prevent bleeding.
The human skeleton is composed of how many bones (in adults)?206201180300 A) 206The adult human skeleton is typically composed of 206 bones. A baby is born with around 300 bones, some of which fuse together as the person grows.
Which of the following is the universal blood donor? A+ B-O+B+C) O-People with blood type O- can donate to people with any blood type because their red blood cells lack both A and B antigens and the Rh factor, making them compatible with all recipients.
Which organ in the human body is responsible for producing insulin?Liver PancreasKidneyGallbladderB) PancreasThe pancreas is a gland located in the abdomen that produces several hormones, including insulin, which regulates blood sugar levels.
What is the function of the "xylem" in a plant?To transport food from the leaves to the rest of the plant.To transport water and nutrients from the roots to the rest of the plant.To provide structural support.To carry out photosynthesis.B) To transport water and nutrients from the roots to the rest of the plant. Xylem is one of the two types of transport tissue in vascular plants. It transports water and dissolved nutrients from the roots to the rest of the plant.
Which of the following is a single-celled organism?A jellyfishA mushroomAn amoebaA fernC) An amoeba An amoeba is a type of single-celled protist that can alter its shape by extending and retracting pseudopods.
What is the process of a cell dividing into two identical daughter cells?MeiosisMitosisPhotosynthesis Respiration B) MitosisMitosis is a part of the cell cycle where a single cell divides into two identical daughter cells.
The study of fungi is known as: CytologyMycologyZoologyBotanyB) MycologyMycology is the branch of biology concerned with the study of fungi.
The process by which plants make their own food using sunlight is called:RespirationTranspirationPhotosynthesis FermentationC) Photosynthesis Photosynthesis is the process used by plants, algae, and some bacteria to convert light energy into chemical energy.
The largest organ in the human body is the:HeartLiverSkinBrainC) Skin The skin is the largest organ of the human body, acting as a protective barrier against the external environment.
The process of breaking down food into smaller molecules for the body to absorb is called: PhotosynthesisRespirationDigestionTranspirationC) Digestion Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules, so they can be absorbed into the blood plasma.
Which part of a plant is responsible for anchoring the plant to the ground and absorbing water and nutrients?Stem LeafFlowerRootD) RootThe root is the part of a plant that is typically below ground and is responsible for absorbing water and minerals from the soil.
What is the main function of the human heart?To produce insulin.To filter waste from the blood.To pump blood throughout the body.To regulate body temperature.C) To pump blood throughout the body.The heart is a muscular organ that pumps blood through the blood vessels of the circulatory system.
The process of a single organism dividing into two or more new organisms is called:Sexual reproduction Asexual reproductionFertilization MeiosisB) Asexual reproductionAsexual reproduction is a type of reproduction that does not involve the fusion of gametes or change in the number of chromosomes.
Which organ in the human body is responsible for filtering waste from the blood?HeartLiver KidneysLungsC) KidneysThe kidneys are a pair of organs that play a crucial role in filtering waste products and excess fluid from the blood.
The process by which living organisms use oxygen to break down food molecules to get energy is called:PhotosynthesisRespiration DigestionTranspirationB) RespirationCellular respiration is the process of converting food molecules into energy in the form of ATP.
Which of the following is responsible for a plant's green color?MitochondriaCytoplasmChlorophyll NucleusC) ChlorophyllChlorophyll is a pigment that gives plants their green color and plays a crucial role in photosynthesis.
The process by which living organisms pass on their traits to their offspring is called:RespirationDigestionHeredityPhotosynthesis C) HeredityHeredity is the process of transmitting genetic characteristics from parents to their offspring.
Which part of the plant is responsible for photosynthesis? Roots StemLeaves Flowers C) LeavesThe leaves of a plant contain chloroplasts, which are the sites where photosynthesis takes place. The green pigment chlorophyll absorbs sunlight to convert carbon dioxide and water into glucose.
The "powerhouse" of the cell is the: NucleusCytoplasm MitochondriaRibosomeC) MitochondriaThe mitochondria are organelles that generate the majority of the cell's supply of adenosine triphosphate (ATP), which is used as a source of chemical energy.
Which organelle is responsible for protein synthesis in a cell?NucleusMitochondria RibosomeCytoplasmC) RibosomeRibosomes are the cellular machines responsible for producing proteins based on the instructions encoded in messenger RNA (mRNA).
The process of a single-celled organism dividing into two or more new organisms is called:Sexual reproduction Asexual reproduction FertilizationMeiosisB) Asexual reproductionAsexual reproduction involves a single organism creating a genetically identical copy of itself.
The process of a plant making its own food is called: Respiration DigestionTranspiration Photosynthesis D) PhotosynthesisPhotosynthesis is the process used by plants to convert light energy into chemical energy that can later be released to fuel the organism's activities.
The "universal solvent" is:Alcohol OilWaterMercuryC) WaterWater is often called the "universal solvent" because it is capable of dissolving more substances than any other liquid.
The largest organ in the human body is the: LiverHeart SkinLungsC) SkinThe skin is the largest organ of the body, covering the entire external surface.
What is the main function of red blood cells? To fight infection. To carry oxygen from the lungs to the rest of the body.To clot blood.To produce hormones. B) To carry oxygen from the lungs to the rest of the body. Red blood cells contain hemoglobin, which is responsible for transporting oxygen from the lungs to all parts of the body.
The primary function of chlorophyll in plants is to:Transport water.Absorb sunlight for photosynthesis. Store nutrients. Protect the plant from pests.B) Absorb sunlight for photosynthesis.Chlorophyll is the green pigment in plants that absorbs light energy from the sun, which is essential for the process of photosynthesis.
What is the main function of the human skeleton?To produce red blood cells.To provide support, protection, and movement for the body.To digest food.To produce hormones. B) To provide support, protection, and movement for the body.The skeleton provides a framework for the body, protects vital organs, and serves as an attachment point for muscles, allowing movement.
The process by which an organism maintains a stable internal environment is called:MetabolismRespiration DigestionHomeostasisD) HomeostasisHomeostasis is the ability or tendency of an organism or a cell to maintain internal equilibrium by adjusting its physiological processes.
What is the main function of red blood cells?To fight infection.To clot blood.To transport oxygen to all parts of the body.To produce hormones. C) To transport oxygen to all parts of the body.Red blood cells contain hemoglobin, a protein that carries oxygen from the lungs to the rest of the body.
The process by which an organism creates a copy of itself is called:RespirationReproductionDigestionMetabolism B) ReproductionReproduction is the biological process by which new individual organisms are produced from their parents.
What is the main function of the human stomach?To filter blood.To absorb nutrients. To produce hormones.To digest food.D) To digest food.The stomach is a muscular, hollow organ that stores food and begins the process of digestion by mixing food with stomach acid and digestive enzymes.