Medical & Analytical Quiz

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Questions: 28 | Attempts: 100

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Medical & Analytical Quiz - Quiz


Questions and Answers
  • 1. 

    The cytoskeleton is formed of 

    • A.

      Proteins

    • B.

      Lipids

    • C.

      Carbohydrates

    • D.

      Glycolipids

    Correct Answer
    A. Proteins
    Explanation
    The cytoskeleton is formed of proteins because proteins are the main structural components of the cytoskeleton. They provide support and shape to the cell, as well as play a role in cell movement and division. Proteins such as actin, tubulin, and intermediate filaments form the different components of the cytoskeleton, including microfilaments, microtubules, and intermediate filaments. These proteins are able to assemble and disassemble, allowing the cytoskeleton to be dynamic and adaptable to the changing needs of the cell.

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  • 2. 

    Which of the following Not considered an inclusion ?

    • A.

      Pigment

    • B.

      Secretory granules

    • C.

      Mitochondria

    • D.

      Lipid

    Correct Answer
    C. Mitochondria
    Explanation
    Mitochondria are not considered an inclusion because they are essential organelles found in most eukaryotic cells, responsible for generating energy in the form of ATP through cellular respiration. Inclusions, on the other hand, are non-living substances or particles that may be present within cells but are not essential for their normal functioning. Examples of inclusions include pigments, secretory granules, and lipid droplets.

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  • 3. 

    The Organelle that help in sorting ( modification ) and packaging of protein is : 

    • A.

      REr

    • B.

      SEr

    • C.

      Lysosomes

    • D.

      Golgi apaaratus

    Correct Answer
    D. Golgi apaaratus
    Explanation
    The Golgi apparatus is responsible for sorting, modifying, and packaging proteins in the cell. It receives proteins from the endoplasmic reticulum (ER) and further processes them by adding sugars, lipids, or other molecules. The Golgi apparatus then packages these proteins into vesicles for transport to their final destinations within the cell or for secretion outside the cell. Therefore, the Golgi apparatus is the organelle that helps in sorting and packaging proteins.

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  • 4. 

    What is the type of epithelium that line the urinary bladder and is capable of distension ? 

    • A.

      Stratified squamous epithelium

    • B.

      Stratified cuboid epithelium

    • C.

      Transtional epithelium

    • D.

      Non of the above

    Correct Answer
    C. Transtional epithelium
    Explanation
    The correct answer is transitional epithelium. This type of epithelium lines the urinary bladder and is capable of distension, meaning it can stretch and expand as the bladder fills with urine. Transitional epithelium is unique because it can change shape and stretch without tearing, allowing the bladder to accommodate varying volumes of urine. This type of epithelium is well-suited for the urinary bladder's function of storing urine before it is eliminated from the body.

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  • 5. 

    The epithelium tissue is characterized by :

    • A.

      Being composed of closely aggregated cell ( a )

    • B.

      Having abundant of inter-cellular spaces (b )

    • C.

      The cells are held together by junctional complexes ( c )

    • D.

      a & b

    • E.

      A & c

    Correct Answer
    E. A & c
    Explanation
    Epithelium tissue is characterized by being composed of closely aggregated cells, meaning that the cells are tightly packed together. This allows the tissue to form a protective barrier. Additionally, the cells in epithelium tissue are held together by junctional complexes, which are specialized structures that provide strong connections between cells. These junctions help to maintain the integrity and function of the tissue. Therefore, the correct answer is a & c.

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  • 6. 

    Which of the following cells is characterized by having a cart-wheel nucleus ? 

    • A.

      Plasma cell

    • B.

      Lymphocyte

    • C.

      Mast cell

    • D.

      Non of the above

    Correct Answer
    A. Plasma cell
    Explanation
    A plasma cell is characterized by having a cart-wheel nucleus. The cart-wheel nucleus refers to the appearance of the nucleus, which has a central region with radial spokes extending outwards. This unique morphology is a distinguishing feature of plasma cells and is not seen in lymphocytes or mast cells. Therefore, the correct answer is plasma cell.

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  • 7. 

    The following is an example of pneumatic bone :

    • A.

      Humerus

    • B.

      Tibia

    • C.

      Skull

    • D.

      Sternum

    Correct Answer
    C. Skull
    Explanation
    The correct answer is skull. The skull is an example of a pneumatic bone because it contains air-filled spaces called sinuses. These sinuses help to reduce the weight of the skull and provide resonance for sound production. The humerus, tibia, and sternum are not examples of pneumatic bones as they do not have air-filled spaces.

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  • 8. 

    The axial skeleton is formed of the following except :

    • A.

      Vertebral column

    • B.

      Femur

    • C.

      Skull

    • D.

      Sternum

    Correct Answer
    B. Femur
    Explanation
    The femur is not part of the axial skeleton. The axial skeleton consists of the skull, vertebral column, and sternum. The femur is actually part of the appendicular skeleton, which includes the bones of the limbs and the girdles that attach them to the axial skeleton. Therefore, the femur is the correct answer as it is not included in the axial skeleton.

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  • 9. 

    The apex of the heart formed of 

    • A.

      Right atrium

    • B.

      Left atrium

    • C.

      Right ventricle

    • D.

      Left ventricle

    Correct Answer
    D. Left ventricle
    Explanation
    The apex of the heart is formed by the left ventricle. The left ventricle is the thickest and strongest chamber of the heart, responsible for pumping oxygenated blood to the rest of the body. It contracts forcefully, creating the apex or the pointed tip of the heart. The right atrium, left atrium, and right ventricle are not involved in forming the apex of the heart.

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  • 10. 

    The sternocostal surface is ( ventricular part )  formed mainly of  

    • A.

      Right atrium

    • B.

      Left atrium

    • C.

      Right ventricle

    • D.

      Left ventricle

    Correct Answer
    C. Right ventricle
    Explanation
    The sternocostal surface, specifically the ventricular part, is primarily formed by the right ventricle. This means that the right ventricle is the main component of the sternocostal surface.

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  • 11. 

    The first part of small intestine called : 

    • A.

      Ileum

    • B.

      Duodenum

    • C.

      Jejunum

    • D.

      Non of the above

    Correct Answer
    B. Duodenum
    Explanation
    The first part of the small intestine is called the duodenum. It is located just below the stomach and is responsible for receiving partially digested food from the stomach and further breaking it down with the help of digestive enzymes from the liver and pancreas. The duodenum plays a crucial role in the absorption of nutrients from the food into the bloodstream.

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  • 12. 

    The first part of large intestine is : 

    • A.

      Rectum

    • B.

      Anal canal

    • C.

      Sigmoid

    • D.

      Cecum

    Correct Answer
    D. Cecum
    Explanation
    The first part of the large intestine is the cecum. The cecum is a pouch-like structure that connects the small intestine to the colon. It is located in the lower right abdomen and is responsible for receiving and storing undigested food and waste material from the small intestine. It also plays a role in absorbing water and electrolytes from the waste material before it moves further into the colon for elimination.

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  • 13. 

    The part of intestine that contains payer`s patches is 

    • A.

      Appendix

    • B.

      Descending column

    • C.

      Ileum

    • D.

      Duodenum

    Correct Answer
    C. Ileum
    Explanation
    The correct answer is ileum. The ileum is the part of the small intestine that contains Peyer's patches. Peyer's patches are small masses of lymphoid tissue found in the mucosa of the ileum. They play a crucial role in the immune system by monitoring and responding to the presence of pathogens in the digestive tract. The appendix is also a part of the intestine, but it does not contain Peyer's patches. The descending colon and duodenum are not associated with Peyer's patches.

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  • 14. 

    من هو صاحب هدف صعود مصر لكأس العالم 2018 بروسيا ؟ 

    • A.

      جلال غازي

    • B.

      محمود طلعت

    • C.

      محمد صلاح

    • D.

      انسولين

    Correct Answer
    C. محمد صلاح
    Explanation
    Mohamed Salah is the correct answer because he is the one who scored the goal that led Egypt to qualify for the 2018 FIFA World Cup in Russia.

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  • 15. 

    .................... Is the soluble form of ...................... 

    • A.

      Iodine - iodide

    • B.

      Triiodide - iodide

    • C.

      Triiodide - iodine

    • D.

      Iodine - triiodide

    • E.

      Non of the above

    Correct Answer
    C. Triiodide - iodine
    Explanation
    Triiodide is the soluble form of iodine. This means that when iodine combines with three iodide ions, it forms a stable compound that can dissolve in a solvent. In contrast, iodine on its own is not very soluble in most solvents. Therefore, the correct answer is triiodide - iodine.

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  • 16. 

    Calculate the solubility of hydroxyapatite in pure water in mole per liter. How is the solubility of hydroxyapatite affected by adding acid? When hydroxyapatite is treated with fluoride, the mineral fluorapatite, Ca5(PO4)3F, forms. The Ksp of this substance is 1*10^-60. Calculate the solubility of fluorapatite in water. How do these calculations provide a rationale for the fluoridation of drinking water?

    • A.

      610E-8

    • B.

      6.10E-8

    • C.

      6.10E-7

    • D.

      7E-8

    Correct Answer
    B. 6.10E-8
    Explanation
    The correct answer is 6.10E-8. This is the correct solubility of hydroxyapatite in pure water in mole per liter. Adding acid to hydroxyapatite decreases its solubility. When hydroxyapatite is treated with fluoride, it forms fluorapatite. The extremely low Ksp value of 1*10^-60 indicates that fluorapatite is highly insoluble in water. These calculations provide a rationale for the fluoridation of drinking water because it shows that adding fluoride to water can significantly decrease the solubility of hydroxyapatite, which helps to prevent tooth decay.

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  • 17. 

    Lead sulphate can be dissolved in dil. H2SO4 

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Lead sulphate cannot be dissolved in dilute H2SO4. Lead sulphate is insoluble in water and most acids, including dilute H2SO4. Therefore, the correct answer is false.

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  • 18. 

    Organic solvents decrease the solubility as they are polar

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Organic solvents actually increase solubility because they are nonpolar. Unlike polar solvents, organic solvents can dissolve nonpolar solutes more effectively. This is because like dissolves like, meaning that polar solvents dissolve polar solutes and nonpolar solvents dissolve nonpolar solutes. Therefore, the given statement is incorrect.

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  • 19. 

    What is the oxidation number of Hydrogen in PH3 ? 

    • A.

      +1

    • B.

      -1

    • C.

      +2

    • D.

      -2

    Correct Answer
    B. -1
    Explanation
    In PH3, the oxidation number of hydrogen is -1. This is because hydrogen typically has an oxidation number of +1, but in this case, it is bonded to phosphorus, which has an oxidation number of -3. Since the overall charge of the molecule is 0, the oxidation number of hydrogen must be -1 to balance out the negative charge from phosphorus.

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  • 20. 

    Reductant itself oxidized and that means increase the valency

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    When a reductant is oxidized, it means that it loses electrons and its valency increases. This is because oxidation involves the loss of electrons, leading to an increase in the oxidation state or valency of the element. Therefore, the statement "Reductant itself oxidized and that means increase the valency" is correct.

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  • 21. 

    H2O2 is known as hydrogen peroxide, it is oxidized to O2, So it loses ...... electrons 

    • A.

      1

    • B.

      2

    • C.

      3

    • D.

      4

    • E.

      Both a & b

    Correct Answer
    B. 2
    Explanation
    Hydrogen peroxide (H2O2) is oxidized to O2, meaning it loses two electrons. This is because the oxygen atom in H2O2 has a higher electronegativity than hydrogen, causing the oxygen to attract the shared electrons more strongly. As a result, the oxygen atoms gain a partial negative charge, while the hydrogen atoms gain a partial positive charge. During oxidation, the oxygen atoms in H2O2 gain two electrons to become O2, while the hydrogen atoms lose their electrons. Therefore, the correct answer is 2, as H2O2 loses two electrons during oxidation.

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  • 22. 

    NH4OH is ........

    • A.

      Insoluble

    • B.

      Soluble

    Correct Answer
    B. Soluble
    Explanation
    NH4OH is soluble because it is a weak base. When NH4OH is dissolved in water, it dissociates into NH4+ and OH- ions. These ions are able to interact with water molecules through hydrogen bonding, allowing NH4OH to dissolve completely in water. Therefore, NH4OH is considered soluble in water.

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  • 23. 

    A matter that combins with some substances to create a reaction

    • A.

      Solute

    • B.

      Solvent

    • C.

      Reagent

    • D.

      Non of the above

    Correct Answer
    C. Reagent
    Explanation
    A reagent is a substance that combines with other substances to create a reaction. In this context, a reagent would be the correct answer as it fits the description of a substance that combines with other substances to create a reaction. A solute refers to a substance that is dissolved in a solvent, and a solvent is a substance that dissolves other substances. "Non of the above" is not a valid option as reagent is the correct answer.

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  • 24. 

    All ......................... reactions are redox 

    • A.

      Combination

    • B.

      Combustion

    • C.

      Decomposition

    • D.

      A & c

    Correct Answer
    B. Combustion
    Explanation
    Combustion reactions involve the rapid combination of a substance with oxygen, resulting in the release of heat and light. These reactions often involve the burning of fuels and are characterized by the presence of oxygen as a reactant. In contrast, combination reactions involve the joining of two or more substances to form a new compound, while decomposition reactions involve the breakdown of a compound into simpler substances. Therefore, combustion reactions are a specific type of redox reaction where oxidation and reduction occur simultaneously.

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  • 25. 

    Stability constant is the reciprocal of dissociation constant

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The statement is true because stability constant and dissociation constant are inversely related. Stability constant represents the tendency of a complex ion to remain intact in solution, while dissociation constant represents the tendency of the complex ion to break apart into its constituent ions. Therefore, the higher the stability constant, the lower the dissociation constant, and vice versa. Taking the reciprocal of the dissociation constant gives the stability constant, thus confirming that stability constant is indeed the reciprocal of dissociation constant.

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  • 26. 

    As Ksp increases, the solubility ................. while as molar concentration increases, the solubility ............... 

    • A.

      Increases - decreases

    • B.

      Decreases - decreases

    • C.

      Increases - increases

    • D.

      Decreases - decreases

    Correct Answer
    C. Increases - increases
    Explanation
    As Ksp increases, the solubility of a compound in a solution also increases. This is because a higher Ksp value indicates a greater tendency for the compound to dissociate and form ions in the solution, leading to a higher concentration of dissolved ions and thus increased solubility. Similarly, as the molar concentration of a compound increases, its solubility also increases. This is because a higher concentration provides more opportunities for the compound to interact with the solvent molecules, leading to a greater amount of the compound being dissolved in the solution.

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  • 27. 

    In the ionization of hydrochloric acid, water acts as ............

    • A.

      Base

    • B.

      Acid

    • C.

      Reductant

    • D.

      Oxidant

    Correct Answer
    A. Base
    Explanation
    In the ionization of hydrochloric acid, water acts as a base. This is because water accepts a proton (H+) from hydrochloric acid, forming the hydronium ion (H3O+). In this reaction, water acts as a proton acceptor, which is the characteristic behavior of a base.

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  • 28. 

    ................. is the most stable form of complexes

    • A.

      Chelating agent

    • B.

      Homoatomic

    • C.

      Chelate

    • D.

      None

    Correct Answer
    C. Chelate
    Explanation
    A chelate is the most stable form of complexes because it forms a ring structure with a central metal ion, which results in a more stable coordination complex. The chelating agent binds to the metal ion through multiple donor atoms, creating a stronger and more secure bond. This ring structure prevents the metal ion from easily dissociating or reacting with other molecules, making the chelate complex highly stable.

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