Temperature and Life
15 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which of the following best defines temperature?

  • A measure of the speed or intensity of the random motions of atoms and molecules in a substance (correct)
  • The limit on where organisms can live and function
  • The amount of energy in an object
  • The direction of heat transfer

    • What is the relationship between temperature and heat?

  • Temperature determines the direction of heat transfer (correct)
  • Temperature and heat are unrelated
  • Heat determines the direction of temperature change
  • Heat sets limits on where organisms can live and function

    • Which of the following is true about ectotherms?

  • They defend a constant body temperature
  • They generate internal (metabolic) heat
  • They rely mostly on external temperatures to determine body temperature (correct)
  • They have more than one temperature set point

    • What is the purpose of transpiration in plants?

    <p>To cool the plant</p> Signup and view all the answers

    What is the relationship between endotherms and ectotherms?

    <p>Endotherms generate internal heat, while ectotherms rely mostly on external temperatures to determine body temperature</p> Signup and view all the answers

    Which of the following is true about compensation in plants?

    <p>Compensation requires a shift away from the acute response.</p> Signup and view all the answers

    What happens to the metabolic rate of plants without compensation?

    <p>The metabolic rate increases with increasing temperature.</p> Signup and view all the answers

    What is the role of enzyme isoforms in compensation?

    <p>Enzyme isoforms allow for the fine-tuning of metabolism.</p> Signup and view all the answers

    How does compensation work in terms of enzyme abundance?

    <p>Compensation involves increasing the amount of enzymes to compensate for reduced efficiency at lower temperatures.</p> Signup and view all the answers

    What contributes to compensation in terms of enzyme activity?

    <p>Changes in enzyme microenvironment and viscosity.</p> Signup and view all the answers

    Which equation represents the relationship between metabolic rate (M), temperature (T), and constants (a, b, and n) for an ectotherm?

    <p>$M=a10^{nT^b}$</p> Signup and view all the answers

    What is the temperature coefficient (Q10) defined as?

    <p>The ratio of the rate of a process at one temperature over the rate of the same process at a temperature 10°C lower</p> Signup and view all the answers

    Which of the following is true about the temperature-metabolic rate relationship?

    <p>It is not exactly exponential and the impact of a change in temperature varies with temperature</p> Signup and view all the answers

    What is the relationship between enzyme-substrate affinity and Km?

    <p>Low Km = high affinity</p> Signup and view all the answers

    What is the maximum rate of reaction (Vmax) defined as?

    <p>The maximum rate of reaction</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser