Biology MCQs for MDCAT and other tests

1: The person who examines an animal's heart by dissection is referred to as: A: Cell biologist B: Histologist C. Microbiologist D. None of the above B: Histologist 2: The author of the book Al-Qanun-fil-Tibb is: A: Bu All sina B. Jabir Bin Hayyan C. Abdul Malik Aasmai D. D: Ibn Nafees A: Bu All Sina Which of the following is not an organism with several cells? A. Frog B.Volvox C. mushroom D. Chlamydomonas A. Frog 4: Mushrooms are a part of the Kingdom A: Fungi B. Protista C. Plantae D. Animalia A: Fungi 5: A/an human heart A: Organ B: Organism C: Tissue D: Organelle A: Organ 6. Which of the following is a macromolecule and which is not? A. Glucose B. Sucrose C. Fatty acid D. Protein A. Glucose 7: There aren't many vegetation in the desert. This could be interpreted as saying: A. Palaeontologist B. Social biologist C: Biogeographic D. Taxonomist C: Biogeographic 8: The majority of an organism's body is made up of A. Hydrogen C. Oxygen B. Carbon D. nitrogen C. Oxygen 9: Volvox is a/an: A. Unicellular B. Multicellular C: Bi-cellular D: Colonial D: Colonial NUTRITION: 1: Chlorosis in plants is caused by a lack of __________________ A: Oxygen B: Iron C: Nitrogen D: Calcium B: Iron 2. The exception is: All of these are micronutrients in plants. A: Hydrogen B: Chlorine C: Iron D: Copper A: Hydrogen 3: Plants use……….to synthesise proteins. A: Oxygen B: Vitamins C: Carbon dioxide D: Nitrates D: Nitrates 4: What occurs to food once it is within the stomach? A: No digestion occurs in the stomach. B: The food moves quickly into the small intestine. C: Juices mix with the food and stomach muscles squeeze lt. D: The food is completely digested and is absorbed into the circulatory system. C: Juices mix with the food and stomach muscles squeeze lt. 5:………….doesn't create digestive juices. A: Esophaguss B: Stomach C: intestine D: Pancreas A: Esophagus 6: The big intestine is where______________is absorbed: A: Water B: Vitamins C: Salts D: All of these D: All of these 7. Saliva fails to: A: Start digestion of proteins B: Secrete saliva C: Help in the lubrication D: Make taste possible A: Start digestion of proteins 8: The cardiac sphincter is the name of the valve between: A: Stomach and duodenum B: Esophagus and stomach C: Duodenum and ileum D: Jejunum and caecum B: Esophagus and stomach 9. Liver functions include: A: Metabolism of carbohydrates, lipids, and proteins B: Breakdown of mature red blood cells. C: Detoxification of the chemicals D: All of the above D: All of the above 10: The following foods are digested by pepsin: A: Carbohydrates B: Proteins C: Vitamins D: Fats D: Fats 11. The true answer to the problem is explained. A. Observations B. Hypothesis C. Data D. Conclusion D. Conclusion 12: Humans contract plasmodium via A. Anopheles B. Culex C. Aedes D. All of these A. Anopheles 13. Who was the first to discover plasmodium in the blood of a malaria patient? A. Ronald Ross B. Laveran C. A. F.A. king D. Mendel B. Laveran BIODIVERSITY 1: What quality distinguishes viruses from other living things? A. They can be crystallized B. They cannot live outside host body C. They contain DNA or RNA D. All of the above C. They contain DNA or RNA 2: Euglena is a member of the Protista kingdom because A. It is Unicellular B. It is Eukaryotic C. It lives in water D. It has both plant and animal-like characters D. It has both plant and animal-like characters 3. The following is the proper order of biological organization: A. Species genus family order B. Genus family class Order C. Family order class Genus D. Species family genus class A. Species genus family order 4:………includes both eukaryotic and autotrophic creatures. A. Protista B. Monera C. Fungi D. None of them A. Protista 5: Who first proposed the five-kingdom system of classification? A. Robert Whittaker B. Margulis and Schwartz C. Carolus Linneaus A. Robert Whittaker 6: Aristotle's classification system for species was based on A. Habitats B. Cell structure C. Morphology D. Anatomy A. Habitats 7: The simplest organisms are included in the kingdom. A: Fungi B. Monera D. Plantae C. Protista B. Monera 8: Can you describe binomial nomenclature? A. Classifying organisms on seven levels B: Naming system developed by Aristotle C. Grouping animals based on their habitat D. Naming system in which each organism is given a two-part name D. Naming system in which each organism is given a two-part name 9. The proper way to format a scientific name is A. Canis Iupus B. Saccharum C. Giant's gazelle D. Escherichia coll D. Escherichia coll 11. Organisms that lack chlorophyll but have cell walls A. Protista B. Fungi C. Animalia D. Plantae A. Protista 11. A group of, genus forms: A. Genus B. Species C. Family D. Order C. Family 12. Habitat has greatest biodiversity in 12th. A. Forests B. Grasslands C. Deserts D. Mountains A. Forests CELLS AND TISSUES: 1: Cell theory, proposed by Schleiden and Schwann, was based on A. Their observation B. Observations of Hooke and Brown C. All observations on the cell D. Observation made on the nucleus of the cell C. All observations on the cell 2: Energy is provided to the cell by: A. Golgi apparatus B. Ribosome C. Mitochondria D. Nucleus C. Mitochondria 3.2D images can be obtained through: A. Light microscope and SEM B. SEM and TEM C. Light Microscope and TEM D. Light microscope C. Light Microscope and TEM 4: The granular material residing inside the nucleus is called: A. Cytoplasm B. Nucleoplasm C. Cell sap D. Protoplasm B. Nucleoplasm 5: Protein synthesis is carried out in A. Ribosome B. Vacuole C. Golgi apparatus D. Plastids 6: Which of the following is the characteristic of nervous tissue? A. Contract and relax B. Transmit the impulses C. Prepare secretion D. Provide energy 7. Tissues that make new cells in plants: A. Meristematic tissue B. Collenchyma tissue C. Epidermal tissue INHERITANCE 1: …………..are small segments of DNA. A: Genes B: Nucleic acids C: Chromosomes D: All of the above 2: ……….is the different forms of gene responsible for the same trait. A: Character B: Centromere C: Trait D: Allele 3. Natural selection alters: A: Populations B: Phyla C: Individuals D: Races 4: A plant has genotype Rrss. How many different gametes would be produced? A: Three B: Four C: Six D: Eight 5. Speciation results in: A: A new gene pool is formed B: Evolutionary path of a species converge C: Hybrid species is formed D: Shows differences in physical traits 6: Phenotype expresses: A: Genetic makeup B: Chemical composition C: Metabolism D: Physical makeup 7: …………is histone plus DNA. A: Centromere B: Chiasma C: Nucleosome D: Chromatin 8: ……….is an allele which shows itself despite being heterozygous. A: Dominant B: Co-dominant C: Recessive D: Incomplete dominant 9: The central dogma consists of A: DNA+RNA = Protein B: DNA-RNA+ Protein C: ONA- RNA->Protein D: Protein RNA> DNA 10: What would be the genotype of parents of homozygous recessive individual? A: Homozygous dominant B: Homozygous recessive C: Heterozygous D: Both 'b' and' c 11………..transport Involves the expenditure of energy and molecules move from lower to higher concentration: A. Diffusion B. Active transport C. Facilitated transport D. Osmosis 12: Which of the following cells have cytoplasm as well as the cell wall? A. Muscle cell B. Red blood cell C. Root hair cell D. Xylem vessel 13. Composition of cell membrane is A. Cellulose only B. Proteins only C. Lipids only D. Lipids and proteins 14: Which of the following organisms have cell wall in their cells? A. Fungi only B. Plants only C. Plants and prokaryotes only D. All of the above 15. Which of the following organelles have a double membrane? A. Vacuoles B. Mitochondria C. Ribosomes D. Centrioles CELL CYCLE 1. Which of the following statements does not describe meiosis? A. There is no DNA synthesis between the divisions B. The result is four cells with haploid number of chromosomes C. Meiosis does not contribute to the genetic diversity in populations D. Fusion of two products of meiosis produces a zygote 2: The number of chromosomes in egg cells is…………if 2n=8for any cell in the body. A: 12 B: 10 C: 8 D: 4 3. Chromosomes have lowest amount of DNA in: A. Prophase-1 B. Prophase-ll C. Telophase- D. Telophase-l 4: Which of the following statements is correct? A. Meiosis produces 4 haploid cells while mitosis produces 2 diploid cells, B. Meiosis produces 4 diploid cells while mitosis produces 2 haploid cells C. Meiosis maintains the number of chromosomes, while mitosis reduces it. D. Prophase-l of mitosis results in the formation of a tetrad but not in prophase meiosis- 5: Crossing over occurs in: A: Prophase-l B: Metaphase- C: Metaphase-ll D: Anaphase- 6. Which of the following events is not the part of mitosis but takes place in meiosis A. The Chromatids of each chromosome are separated. B. Synapsis and crossing-over occurs. C. The nuclear envelope breaks down. 7: Which of the following organs produce cells through meiosis? A. Testes B. Heart C. Lungs D. Stomach 8: ……….has two sister Chromatids A: Centromere B: Chromosome C: Multichromatid D: Homologous pair 9: The cell divides during regeneration through A. Only 1t meiotic division B. Both meiotic divisions C. Mitosis D. All of them 10. Homologous chromosomes: A. Are identical B. Pair-up during meiosis C. One partner of homologous pair move to each daughter cell D. All of them Solving A BIOLOGICAL PROBLEMS 1. The biological approach begins with A: Hypothesis B: Experiment C. Observation D. Deduction 2. How can you tell if the RBC was wiped off by the plasmodium? A. Examine the blood of a single healthy person B. Examine the blood of a single infected person C. Allow mosquito to bite a healthy person and examine his blood D. Examine the blood of some healthy and also some Infected person 3. The results of the studies' data collection can be examined by A. Reading the data and drawing conclusions B. Discussion with scientists C. Simple calculations on calculator D. Application of statistical formulae 4: How does smoking lower the risk of contracting malaria? A. Smoke kills plasmodium in their blood B. Fire increases temperature and plasmodia are killed in air C. Mosquitoes cannot tolerate smoke and are repelled D. Smoke kills Plasmodium present in mosquitoes 5. Which of the following does not provide an explanation? A. It must be consistent with all available data B. It must be testable C. It must be correct D. Must make deductions 6. Deductions come from A. Observations B. Hypothesis C. Experiment result D. Solution of biological problem 7. The assertion of the theory A: Logical B: Possible answer C: based upon observations D. All of them REPRODUCTION: 1: Genetic variants come about as a result of A: Sexual reproduction B: Asexual reproduction C: Large number of organisms D: Mitosis 2: The hydra's method of reproduction is a Asexual reproduction occurs in hydra via A: Multiple fission B: Binary fission C: Spore formation D: Budding 3: Plants are artificially vegetative propagated by A: Spore formation B: Binary fission C: Grafting D: Budding 4: Parthenogenesis creates a new person from: A: Fertilized egg B: Common body cell C: Unfertilized egg D: Sperm 5: The flower's……..part contains the embryo sac. A. Style B. Filament C: Anther D: Ovule 6: To undergo, male and female gametes combine. A: Oogenesis B: Gametogenesis C: Fertilization D: Spermatogenesis 7. After a series of mitotic divisions, a single cell that results in an individual is known as: A: Egg B: Zygote C: Sperm D: Blood cell 8. results in the number of chromosomes being diploid in: A: Oogenesis B: Spermatogenesis C: Ovulation D: Fertilization 9. Which of the subsequent nine exhibits external fertilizations'? A: Fish and amphibians B: Reptiles C: Mammals D: Birds 10. Of the following, which exhibits internal fertilizations? A: Amphibians B: Mammals C: Fish D: Aquatic animals HOMEOSTASIS 1: The upkeep of the organism's interior environment is accomplished by A: Fluids regulation B: Temperature regulationd. C: Excretion of wastes D: All of the above 2: Xerophytes develop these conditions to enable them to thrive in harsh environments, with the exception of A: Thick cuticle B: Sunken stomata C: Large number of stomata D: Deep root system 3: The water lost by plants in the form of tiny droplets from tiny pores is referred to as A: Stomatal transpiration B: Lenticular transpiration C: Cuticular transpiration D: Guttation 4: The nephron's waste fluid exits to enter A: Collecting tubules B: Ureter C: Medulla D: Convoluted tubules 5: The urinary bladder and kidneys are connected by A: Urethra B: Ureter C: Renal tubule D: Nephron 6: Kidney generates waste products made of A: Water, proteins, and salts B: Salts, water, and vitamins C: Urea and water D:'Urea, water, and salts 7: Sweating from the skin makes it a A: Respiratory organ B: Excretory organ C: Digestive organ D: Breathing organ 8: Sweat has the following purposes: A: Keep the body cool and to remove excess proteins B: Keep the body warm and to filter the blood C: Filter the blood and to remove waste products D: Remove waste products and to cool the body 9: The Bowman's capsule's filtrate DOES NOT CONTAIN: A: Water B: Calcium ions C: Blood cells D: Urea 10. The liver contributes to the generation of urea by: A: Uric acid B: Ammonia C: Amino acids D: Carbon dioxide SUPPORT AND Movement 1. The appendicular skeleton is made from by A: Pelvic girdle B: Pectoral girdle C: Limbs All of the above 2. Vertebrae are linked together by A: Fixed joint B: Ball-and-socket joint C: Slightly moveable Joint D: Hinge joint 3: The axial skeleton excludes A: Sternum B: Vertebrae C: Leg bones D: Skull 4: Bones have, which makes them more powerful than cartilage. A: Collagen fibers B: Calcium phosphate C: Osteocytes D: Lacunae 5: The protein that makes up the matrix of cartilage. A: Collagen B: Osteo-nectin C: Keratin D: Actin 6: A joint between two bones consists of A: Tendon B: Ligament C: Cartilage D: Marrow 7: Bones become brittle and feeble. A: Osteoporosis B: Rheumatoid arthritis C: Osteoarthritis D: Vertebral column 8: The area where the muscle attaches to the bone is located at position eight. Ligament Tendon Origin Insertion 9: ………………..is inflammation, in joints. A: Osteoporosis B: Arthritis C: Rickets . D: All of the above ENZYMES 1: Enzymes are ____________________: A: Carbohydrates B: Proteins C: Fats D: Starch 2: Which of the following statements best describes how enzymes work? A: Allow new chemical reactions to occur. B: Are used up during chemical reactions. C: Alter the direction of chemical reactions. D: Alter the rate of chemical reactions. 3: Which of the above statements best describes the enzyme? A: All parts of enzyme molecule take part in reaction B: Enzymes lower the activation energy of reaction C: An enzyme can act upon any kind of substrates D: They are needed in large quantities 4: The cofactors fit into which of the following categories? A: Take part in reactions B: Increase activation energy C: Help enzymes in their activity D: Are composed of proteins 5: The coenzymes are:_________________ A: Carbohydrates B: DNA C: Proteins D: Vitamins 6: How is the enzyme or reaction impacted by a temperature shift above the ideal temperature? A: Increase the rate of reaction B: Not affect the rate of reaction C: Decrease the rate of reaction D: Denature the enzyme 7: The ideal pH for the action of the trypsin enzyme is: A: acidic pH B: pH does not affect its activity C: alkaline pH D: neutral pH 8: Environmental changes have an impact on enzymes, which ultimately has an impact on: A: Respiration B: Metabolism C: Digestion D: All of them 9: The body's elevated temperature is risky because: A: Nerves breakdown B: Boiling of body water C: Enzymes stop to work D: None of them TRANSPORT 1: The cells that make platelets are known as: A: Erythrocytes B: Leucocytes C: Bone marrow cells D: All of these 2: Blood of blood type O may be given to: A: a B: ab C: b d. All of the these 3: The human heart's chamber has the thickest wall. A: Right atrium B: Left ventricle C: Left atrium D: Right ventricle 4: The following processes enable blood to diffuse into the tissues: A: Arteries B: Veins C: Capillaries D: Arteries and veins 5: Except for one, every vein that follows carries deoxygenated blood: A: Vena cava B: Pulmonary C: Hepatic portal D: Renal 6: Which blood cells are involved in clotting? A: Platelets B: Neutrophils C: Erythrocytes D: Basophils 7: A person with the blood type A is capable of receiving group's blood. A: A or AB B: A or O C: A only D: O Only 8: Myocardial infarction is the outcome of blood flow being blocked in. A: Pulmonary artery B: Hepatic artery C: Aorta D: Coronary artery BIO-ENERGETICS 1: Dark reaction takes place in A: Mitochondria B: Ribosome C: Granum of chloroplast D: Stroma of chloroplast 2:………….trap light energy and use it to create carbohydrates. A: Plants B: Algae C: Photosynthetic organisms D: Fungi 3: The photosynthetic site is: A: Mesophyll cells B: Phloem cells C: Guard cells D: All of the above 4: Controls photosynthesis by serving as an enzyme limiting factor. A: Temperature B: Pigments C: CO concentration D: Light intensity 5: The following hues are crucial for photosynthesis: A: Yellow and orange B: Green and yellow C: Green and orange D: Red and blue 6: Which of the following drugs is never appropriate for use in respiration? A: Food molecule B: Oxygen C: Enzymes D: Co, 7: The primary component to which three phosphate groups are bonded in the ATP molecule is: A: Ribose B: Glucose C: Adenine D: H20 8:……….serves as fuel for living cells to conduct out their functions: A: Electric power B: Generator C: ATP D: Heat energy 9: The bacterial cell's site of glycolysis is: A: Mesosome B: Cytoplasm C: Nucleoid D: Mitochondria 10: When pyruvic acid is transformed to ethanol, which molecules are used up during the anaerobic respiration? A: one NADH and CO2 B: only COa C: one NADH2 D: two NADH2 COORDINATION AND CONTROL 1: A hormone called insulin is released by; A: Liver B: Pancreas C: Kidney D: Stomach 2:…………carries messages to the neuron cell body. A: Axon B: Dendrite C: Schwann cell. D: Myelin sheath 3:……….identifies changes in the environment. A: Receptors B: Effectors C: Neurons D: All of them 4: Cereberal cortex: A: Is located deep in the brain. B: Is the folded outer covering of the brain. C: Is located at the back of the brain. D: Is part of the peripheral nervous system. 5: The circumstance when the light beams are concentrated behind the retina is known as: A: Myopia B: Short sightedness C: Hypermetropla D: Normal vision 6: Neuron terminals include tiny gaps known as: Synapses Nodes Transmitters Pores 7: The largest portion of the brain is. A: Cerebrum B: Cerebellum C: Amygdala D: Frontal lobe 8: These factors influence intelligence: A: Cerebrum B: Cerebellum C: Hypothalamus D: Thalamus 9: The makeup of mixed nerves A: Axons of sensory and motor neuron B: Cell bodies of sensory and motor neurons C: Axons of inter-neurons D: Cell bodies of Inter-neurons 10: These factors regulate memory: A: Cerebellum B: Limbic system C: Hippocampus D: Hypothalamus 11: Which of the following glands has both an endocrine and an exocrine function? A: Thyroid B: Pancreas C: Pituitary D: Adrenal

Biology MCQs for MDCAT and other tests

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Biology MCQs for MDCAT/ MCAT and Test Preparation

Biology MCQs for MDCAT/ MCAT and Test Preparation

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