Biology Scientific Method and Macromolecules
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Questions and Answers

What defines an independent variable in an experiment?

  • The variable that remains constant throughout the experiment
  • The variable that is observed or measured
  • The variable that is changed or manipulated (correct)
  • The variable that is derived from the analysis of data

    • Which step in the Scientific Method involves evaluating the results obtained from an experiment?

  • Make a hypothesis
  • Ask a Question
  • Share results
  • Analyze Data (correct)

    • Why are control variables important in an experiment?

  • They provide a comparison for the dependent variable.
  • They are the primary focus of the experiment.
  • They ensure only the independent variable affects the outcome. (correct)
  • They help formulate a hypothesis.

    • What characteristic is NOT associated with living things?

    <p>Capable of producing mechanical energy</p> Signup and view all the answers

    What is the first step of the scientific method?

    <p>Ask a Question</p> Signup and view all the answers

    Which of the following macromolecules is classified as a polymer of nucleotides?

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

    What term describes the maximum population size that an environment can sustain indefinitely?

    <p>Carrying Capacity</p> Signup and view all the answers

    Identify the monomer that is associated with carbohydrates.

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

    Which of the following represents a lipid?

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

    Which type of growth initially accelerates rapidly but eventually slows as it approaches a limit?

    <p>Logistic Growth</p> Signup and view all the answers

    Which biological macromolecule is primarily responsible for long-term energy storage?

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

    What is the primary role of enzymes in biological systems?

    <p>Catalyze chemical reactions</p> Signup and view all the answers

    Which of the following statements correctly describes the lock-and-key model of enzyme action?

    <p>The substrate fits perfectly into the enzyme's active site.</p> Signup and view all the answers

    Which carbohydrate is primarily known for providing short-term energy?

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

    At what optimal temperature does the enzyme Trypsin function best?

    <p>40°C</p> Signup and view all the answers

    What is the primary function of mitochondria within a cell?

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

    Which structure is unique to plant cells compared to animal cells?

    <p>Cell wall</p> Signup and view all the answers

    What characterizes prokaryotic cells as compared to eukaryotic cells?

    <p>Lack of nucleus</p> Signup and view all the answers

    What is the process by which a cell maintains a stable internal environment called?

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

    Which type of transport requires the use of cellular energy (ATP)?

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

    What is the primary role of decomposers in an ecosystem?

    <p>They break down dead organisms and organic matter.</p> Signup and view all the answers

    Which of the following factors is not a contributor to the loss of biodiversity?

    <p>Niche partitioning</p> Signup and view all the answers

    What type of organism is referred to as an autotroph?

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

    In the relationship between Tom (the cat) and Jerry (the mouse), who is the predator?

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

    Which of the following accurately describes niche partitioning?

    <p>Species divide resources to minimize competition.</p> Signup and view all the answers

    What is the primary function of the Calvin Cycle in photosynthesis?

    <p>To synthesize glucose from carbon dioxide</p> Signup and view all the answers

    In which stage of cellular respiration is the majority of ATP produced?

    <p>Electron transport chain</p> Signup and view all the answers

    Which statement correctly describes aerobic respiration?

    <p>It produces energy with the help of oxygen.</p> Signup and view all the answers

    Which type of fermentation occurs primarily in muscle cells?

    <p>Lactic acid fermentation</p> Signup and view all the answers

    What gas is released during alcoholic fermentation?

    <p>Carbon dioxide</p> Signup and view all the answers

    What is the primary role of keystone species in an ecosystem?

    <p>To maintain the structure and balance of the ecosystem</p> Signup and view all the answers

    Which of the following best describes intraspecific competition?

    <p>Competition between members of the same species for resources</p> Signup and view all the answers

    What is a significant consequence of introducing an invasive species to an ecosystem?

    <p>Outcompetes native species for resources</p> Signup and view all the answers

    Which of the following organisms is considered a tertiary consumer in the desert food web?

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

    What characterizes a symbiotic relationship between species?

    <p>A close, long-term interaction that can be beneficial or harmful</p> Signup and view all the answers

    Which process describes the movement of molecules from an area of high concentration to an area of low concentration?

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

    What occurs when a cell is placed in a hypotonic solution?

    <p>Water enters the cell</p> Signup and view all the answers

    What is the primary function of exocytosis?

    <p>To release substances from the cell</p> Signup and view all the answers

    In terms of solute concentration, how does a hypertonic solution compare to the inside of a cell?

    <p>Higher concentration of solutes than the cell</p> Signup and view all the answers

    Which color of light is predominantly reflected by chlorophyll in chloroplasts?

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

    What characterizes the relationship of mutualism?

    <p>Both organisms are benefited in the relationship.</p> Signup and view all the answers

    What happens to the majority of energy in an ecological pyramid?

    <p>It is released as heat.</p> Signup and view all the answers

    Which of the following defines a limiting factor in a population?

    <p>Something that restricts the population size, such as food, water, or space.</p> Signup and view all the answers

    What is the difference between a density-dependent and density-independent limiting factor?

    <p>Density-dependent factors limit growth based on population density, whereas density-independent factors do not.</p> Signup and view all the answers

    What is meant by carrying capacity in an ecological context?

    <p>The maximum number of individuals of a species that an environment can support.</p> Signup and view all the answers

    Study Notes

    Introduction to Biology

    • Independent variable: What you change (like water amount)
    • Dependent variable: What you measure or observe
    • Legend (key): Explains symbols on graph
    • Title: Summarizes the experiment
    • Steps of the scientific method
    • Ask a question
    • Research
    • Formulate a hypothesis
    • Experiment
    • Analyze data
    • Draw conclusion
    • Share results
    • Characteristics of living things
    • Made of cells
    • Reproduce
    • Grow and develop
    • Respond to their environment
    • Based on DNA

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    Description

    Test your understanding of key concepts related to the scientific method, independent variables, and macromolecules in biology. This quiz covers fundamental principles, including enzyme function, growth patterns, and the role of carbohydrates and lipids. Perfect for students seeking to reinforce their knowledge in biological sciences.

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