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Questions and Answers

What is the key difference between facilitated diffusion and simple diffusion?

  • Requires energy in simple diffusion
  • Faster rate of transport in simple diffusion
  • Higher specificity in facilitated diffusion
  • Presence of carrier proteins in facilitated diffusion (correct)

    • In passive transport, which of the following statements is true?

  • Transport rate is usually slow (correct)
  • Energy is required for the movement of molecules
  • Specificity for substrate is high
  • There is active participation by carrier proteins

    • What characteristic distinguishes active transport from passive transport?

  • Requires energy input (correct)
  • Has a slow transport rate
  • High specificity for substrates
  • Does not involve carrier proteins

    • Which of the following is a feature of secondary active transport?

    <p>Indirect energy usage</p> Signup and view all the answers

    How does the saturation of a transporter differ from that of a channel?

    <p>Transporter shows very high saturation</p> Signup and view all the answers

    Which type of transport is characterized by the movement of molecules across a membrane down a concentration gradient, without the requirement of energy?

    <p>Simple diffusion</p> Signup and view all the answers

    What is the main difference between facilitated diffusion and simple diffusion?

    <p>Simple diffusion does not require specific membrane proteins</p> Signup and view all the answers

    Which form of transport is considered a passive process due to the lack of energy expenditure?

    <p>Facilitated diffusion</p> Signup and view all the answers

    In which type of transport do molecules move across a membrane with the help of specific carrier proteins but do not proceed against a concentration gradient?

    <p>Facilitated diffusion</p> Signup and view all the answers

    What distinguishes active transport from passive transport mechanisms?

    <p>Active transport moves molecules against their concentration gradient</p> Signup and view all the answers

    Which method of transport involves the cell engulfing particles or fluids from its surroundings?

    <p>Endocytosis</p> Signup and view all the answers

    Which type of transport move substances from an area of higher concentration to an area of lower concentration without requiring chemical energy like ATP or GTP?

    <p>Facilitated diffusion</p> Signup and view all the answers

    Which type of transport relies on transport proteins for moving substances across the membrane?

    <p>Facilitated diffusion</p> Signup and view all the answers

    What is a characteristic of simple diffusion in comparison to facilitated diffusion?

    <p>Rate is generally slower</p> Signup and view all the answers

    Which type of transport has a rate that may be affected by factors like temperature and types of membrane proteins involved?

    <p>Facilitated diffusion</p> Signup and view all the answers

    In which type of transport do substances move from an area of higher concentration to an area of lower concentration?

    <p>Simple diffusion</p> Signup and view all the answers

    Which mechanism of transport directly requires the input of chemical energy like ATP or GTP?

    <p>Active transport</p> Signup and view all the answers

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