1st Online Quiz In Biology Sbis

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1st Online Quiz In Biology Sbis - Quiz


First online quiz to be taken by 2nd Year SBIS students SY 2010-2011.

Questions and Answers
  • 1. 

    Which of the following is a cutting instrument used for slicing very thin pieces of specimens for slide preparations?

    • A.

      Centrifuge

    • B.

      Microtome

    • C.

      Micromanipulator

    • D.

      Staining

    • E.

      None of the above

    Correct Answer
    B. Microtome
    Explanation
    A microtome is a cutting instrument specifically designed for slicing very thin pieces of specimens for slide preparations. It is commonly used in histology and pathology laboratories to obtain thin sections of tissue samples for microscopic examination. The microtome allows precise control over the thickness of the slices, ensuring that they are thin enough to be mounted on slides and viewed under a microscope. The other options listed (centrifuge, micromanipulator, staining) are not cutting instruments and are not used for slicing specimens.

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  • 2. 

    Which among the following is a factor or cause of food spoilage?

    • A.

      Bacteria

    • B.

      Fungi

    • C.

      Moisture

    • D.

      Warm temperature

    • E.

      All of the above

    Correct Answer
    E. All of the above
    Explanation
    All of the options listed (bacteria, fungi, moisture, warm temperature) are factors or causes of food spoilage. Bacteria and fungi are microorganisms that can grow on food and break it down, leading to spoilage. Moisture can create an environment that promotes the growth of bacteria and fungi. Warm temperature also accelerates the growth of microorganisms on food, increasing the likelihood of spoilage. Therefore, all of these factors contribute to food spoilage.

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  • 3. 

    Hydrophobic regions consist of polar molecules which are soluble in water.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Hydrophobic regions consist of nonpolar molecules, not polar molecules. Nonpolar molecules are not soluble in water, which is a characteristic of hydrophobicity. Therefore, the statement is false.

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  • 4. 

    The concetration is not affected by the amount of solute in a solution. 

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The concentration of a solution is affected by the amount of solute dissolved in it. Concentration refers to the amount of solute present in a given amount of solvent or solution. If more solute is added to a solution, the concentration increases, and if less solute is added, the concentration decreases. Therefore, the statement that the concentration is not affected by the amount of solute in a solution is false.

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  • 5. 

    Which among the following is not a composition of the cell membrane?

    • A.

      Protein

    • B.

      Cholesterol

    • C.

      Carbohydrate chain

    • D.

      None of the above

    Correct Answer
    D. None of the above
    Explanation
    The cell membrane is composed of various components including proteins, cholesterol, and carbohydrate chains. Therefore, none of the options listed (protein, cholesterol, carbohydrate chain) are excluded from being a composition of the cell membrane.

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  • 6. 

    Diffusion is a passive transport.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Diffusion is a passive transport process because it does not require the input of energy. It occurs when particles move from an area of higher concentration to an area of lower concentration, down the concentration gradient. This movement of particles happens spontaneously, driven by the random motion of molecules. Therefore, diffusion is considered a passive process as it does not require the use of cellular energy or any external force to occur.

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  • 7. 

    Diffusion and ___________ is an example of passive transport.

    Correct Answer
    osmosis
    Explanation
    Diffusion and osmosis are both examples of passive transport, which means that they do not require energy input from the cell. Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration, while osmosis is the movement of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration. Both processes occur spontaneously and help maintain the balance of solutes and water in cells and organisms.

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  • 8. 

    Osmosis is possible with the presence of a semi-permeable membrane.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Osmosis is a process where solvent molecules move from an area of lower solute concentration to an area of higher solute concentration through a semi-permeable membrane. The semi-permeable membrane allows the passage of solvent molecules but restricts the movement of solute molecules. Therefore, the presence of a semi-permeable membrane is necessary for osmosis to occur. Hence, the statement "Osmosis is possible with the presence of a semi-permeable membrane" is true.

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  • 9. 

    The concetration of a 100mL solution with 40 g of solute is 60%

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The concentration of a solution is typically expressed as the amount of solute dissolved in a given amount of solvent. In this case, the concentration is given as 60%, which means that 60 g of solute is dissolved in 100 mL of solution. However, the question states that there is only 40 g of solute in the 100 mL solution, which is less than the 60 g required for a 60% concentration. Therefore, the correct answer is false.

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  • 10. 

    Passive transport is a mechanism of cellular transport wherein substances move against the concetration gradient.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Passive transport is actually a mechanism of cellular transport wherein substances move along the concentration gradient, not against it. In passive transport, substances move from an area of higher concentration to an area of lower concentration without the need for energy input. This can occur through processes such as diffusion or facilitated diffusion. Therefore, the correct answer is false.

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  • 11. 

    What is the amount of solute present in a 1 liter solution? The concentration of the solution  is 10%.

    • A.

      10g

    • B.

      100g

    • C.

      10,000g

    • D.

      1,000g

    • E.

      0.1g

    Correct Answer
    B. 100g
    Explanation
    The concentration of the solution is given as 10%. This means that for every 100g of the solution, there are 10g of solute. Since the volume of the solution is 1 liter, the amount of solute present in the solution would be 10% of 1000g, which is equal to 100g.

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  • 12. 

    Hypertonic solutions contain higher amount of solutes.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Hypertonic solutions have a higher concentration of solutes compared to the surrounding environment. This causes water to move out of the cells through osmosis, resulting in cell shrinkage. Therefore, the statement that hypertonic solutions contain a higher amount of solutes is true.

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  • 13. 

    Which of the following best describes an isotonic solution?

    • A.

      Solutions of equal concentration of solutes

    • B.

      Solutions of with higher concentration of solutes

    • C.

      Solutions of with lower concentration of solutes

    • D.

      All of the above

    Correct Answer
    A. Solutions of equal concentration of solutes
    Explanation
    An isotonic solution refers to a solution that has an equal concentration of solutes compared to another solution. In other words, it has the same osmotic pressure as the solution it is being compared to. This means that there is no net movement of water across a semipermeable membrane when the two solutions are separated by it. Isotonic solutions are commonly used in medical settings, such as in intravenous fluids, to ensure that there is no disruption in the balance of fluids and electrolytes in the body.

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  • 14. 

    Pinocytosis is also described as "CELL EATING"?

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Pinocytosis is a form of endocytosis where the cell engulfs extracellular fluid and small particles dissolved in it. It is often referred to as "cell drinking" rather than "cell eating". This is because pinocytosis involves the uptake of liquid or dissolved substances, rather than solid particles. Therefore, the statement that pinocytosis is described as "cell eating" is false.

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  • 15. 
    What is being described as a condition of the image of an animal cell? - ProProfs

    What is being described as a condition of the image of an animal cell?

    • A.

      Shriveled

    • B.

      Normal

    • C.

      Lysed

    • D.

      Plasmolyzed

    • E.

      Turgid

    Correct Answer
    C. Lysed
    Explanation
    Lysed refers to the condition of the image of an animal cell where the cell membrane has burst or disintegrated, causing the cell contents to be released. This is indicated by the loss of cell shape and structure.

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  • 16. 

    A mitochondrion is bigger than a ribosome.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Mitochondria and ribosomes are both organelles found within cells. Mitochondria are responsible for producing energy in the form of ATP, and they are larger in size compared to ribosomes. Ribosomes, on the other hand, are responsible for protein synthesis and are much smaller in size. Therefore, it is true that a mitochondrion is bigger than a ribosome.

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  • 17. 
    What is name of this equipment? - ProProfs

    What is name of this equipment?

    • A.

      Microtome

    • B.

      Centrifuge

    • C.

      Micromanipulator

    • D.

      None of the above

    Correct Answer
    B. Centrifuge
    Explanation
    A centrifuge is a piece of equipment used in laboratories to separate substances of different densities by spinning them at high speeds. It uses centrifugal force to separate the components of a mixture based on their weight and density. This equipment is commonly used in various scientific and medical fields for tasks such as separating blood components, isolating DNA, and purifying proteins.

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  • 18. 

    Adding salt to food can cause removal of water in the cytoplasm of microorganism. 

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    When salt is added to food, it creates a hypertonic environment, meaning that the concentration of solutes outside the microorganism is higher than inside. This causes water to move out of the microorganism through osmosis, leading to dehydration and ultimately inhibiting the growth and survival of the microorganism. Therefore, adding salt to food can indeed cause the removal of water in the cytoplasm of microorganisms.

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  • 19. 

    Amphipatic means containing both hydrophobic and isotonic regions.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement that "Amphipatic means containing both hydrophobic and isotonic regions" is incorrect. Amphipathic refers to a molecule or compound that has both hydrophobic (nonpolar) and hydrophilic (polar) regions. Isotonic, on the other hand, refers to a solution that has the same concentration of solutes as another solution. These terms are not interchangeable, and amphipathic does not involve isotonic regions. Therefore, the correct answer is false.

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  • 20. 

    Which of the following is the complete name of Sir Riz?

    • A.

      Lorizty Lo Calingasion

    • B.

      Lorizty Lo Calingacion

    • C.

      Loristy Lo Calingacion

    • D.

      None of the above

    Correct Answer
    B. Lorizty Lo Calingacion
    Explanation
    The complete name of Sir Riz is Lorizty Lo Calingacion.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Aug 08, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Aug 12, 2010
    Quiz Created by
    LoriztyCalingaci

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