Biology lab practical
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Questions and Answers

Which step of the scientific method involves organizing research into a scientific report?

  • Report and Publish (correct)
  • Hypothesis
  • Question
  • Observation
  • What is the function of control variables in an experiment?

  • To analyze the data
  • To measure the dependent variable
  • To ensure unbiased results (correct)
  • To manipulate the independent variable
  • Which type of organic molecule is the first class of organic molecules?

  • Lipids
  • Proteins
  • Carbohydrates (correct)
  • Nucleic acids
  • What is the sample size in an experiment and why is it important?

    <p>The number of participants or observations included in a study</p> Signup and view all the answers

    Which statement best defines the hypothesis in the scientific method?

    <p>An educated guess based on research</p> Signup and view all the answers

    What are the control variables in an experiment?

    <p>Cells that receive no treatment</p> Signup and view all the answers

    Which type of variable is the dependent variable in an experiment?

    <p>Dependent variable</p> Signup and view all the answers

    What is the second class of organic molecules?

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

    Which step of the scientific method involves conducting an experiment to prove or disprove the hypothesis?

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

    What is the role of observation in the scientific method?

    <p>To observe based on existing knowledge</p> Signup and view all the answers

    Which reagent is used to test for lipids?

    <p>Sudan IV</p> Signup and view all the answers

    What is the function of the objective lens on a microscope?

    <p>To provide magnification</p> Signup and view all the answers

    What is the function of the iris diaphragm on a microscope?

    <p>To control the amount of light that reaches the specimen</p> Signup and view all the answers

    What is the function of the fine focus knob on a microscope?

    <p>To focus on the specimen</p> Signup and view all the answers

    What is the field of view equation on a microscope?

    <p>FOV 10x = FOV 4x x total mag 4x</p> Signup and view all the answers

    What is the function of the stage clips on a microscope?

    <p>To hold the slides in place</p> Signup and view all the answers

    What is the function of the condenser knob on a microscope?

    <p>To control the amount of light that reaches the specimen</p> Signup and view all the answers

    What is the function of the base on a microscope?

    <p>To support the microscope</p> Signup and view all the answers

    What is the function of the arms on a microscope?

    <p>To connect the base to the head and eyepiece</p> Signup and view all the answers

    What is the function of the eyepiece on a microscope?

    <p>To look through</p> Signup and view all the answers

    Where does the 6th step of the Krebs cycle take place?

    <p>Mitochondrial matrix</p> Signup and view all the answers

    What is the main purpose of sodium fluoride in cellular processes?

    <p>Stops glycolysis</p> Signup and view all the answers

    Which part of the cell does glycolysis occur in?

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

    What is the purpose of paper chromatography in separating pigments?

    <p>Utilizes different solubility and attachment to separate pigments</p> Signup and view all the answers

    What is the main function of plant pigments?

    <p>Absorb energy from light for controlled photosynthesis</p> Signup and view all the answers

    What is the equation for photosynthesis?

    <p>$6CO2 + 6H2O ightarrow C6H12O6+ 6O$</p> Signup and view all the answers

    What is the equation for cellular respiration?

    <p>$C6H12O6 + 6O2 ightarrow 6CO2 + 6H2O$</p> Signup and view all the answers

    What is the function of succinate in the Krebs cycle?

    <p>It is oxidized to fumarate</p> Signup and view all the answers

    What is the main location of the Krebs cycle?

    <p>Mitochondrial matrix</p> Signup and view all the answers

    What is the role of sodium fluoride in cellular respiration?

    <p>It inhibits glycolysis</p> Signup and view all the answers

    Which step of the scientific method involves organizing research into a scientific report?

    <p>Report and Publish</p> Signup and view all the answers

    What is the function of the objective lens on a microscope?

    <p>To focus the image of the specimen</p> Signup and view all the answers

    What is the field of view equation on a microscope?

    <p>Field of View = Magnification x Diameter of Objective Lens</p> Signup and view all the answers

    What is the function of the fine focus knob on a microscope?

    <p>To focus the image of the specimen</p> Signup and view all the answers

    What is the function of the arms on a microscope?

    <p>To provide support and stability to the microscope</p> Signup and view all the answers

    What is the main location of the Krebs cycle?

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

    Which step of the scientific method involves conducting an experiment to prove or disprove the hypothesis?

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

    Which part of the cell does glycolysis occur in?

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

    What is the purpose of paper chromatography in separating pigments?

    <p>To identify the different pigments present in a sample</p> Signup and view all the answers

    Which type of organic molecule is the first class of organic molecules?

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

    Which reagent is used to test for proteins?

    <p>Biuret test</p> Signup and view all the answers

    What did Dische diphenylamine test for?

    <p>Nucleic acids</p> Signup and view all the answers

    What is the function of the iris diaphragm on a microscope?

    <p>To control the amount of light that reaches the specimen</p> Signup and view all the answers

    What is the function of the stage clips on a microscope?

    <p>To hold the slides in place</p> Signup and view all the answers

    What is the field of view equation on a microscope?

    <p>FOV 10x = FOV 4x x total mag 4x</p> Signup and view all the answers

    What is the function of the base on a microscope?

    <p>To connect the base to the head and eyepiece</p> Signup and view all the answers

    What is the function of the fine focus knob on a microscope?

    <p>To adjust the focus of the specimen</p> Signup and view all the answers

    What is the function of the objective lens on a microscope?

    <p>To provide different levels of magnification</p> Signup and view all the answers

    What is the function of the arms on a microscope?

    <p>To connect the base to the head and eyepiece</p> Signup and view all the answers

    What is the function of the condenser knob on a microscope?

    <p>To control the amount of light that reaches the specimen</p> Signup and view all the answers

    Which part of the cell does the Krebs cycle take place in?

    <p>Mitochondrial matrix</p> Signup and view all the answers

    What is the purpose of sodium fluoride in cellular respiration?

    <p>Stops glycolysis</p> Signup and view all the answers

    What is the purpose of paper chromatography in separating pigments?

    <p>Utilizes solubility and attachment to separate pigments</p> Signup and view all the answers

    What is the main function of plant pigments?

    <p>Absorb energy from light</p> Signup and view all the answers

    What is the equation for photosynthesis?

    <p>$6CO2 + 6H2O \rightarrow C6H12O6 + 6O2$</p> Signup and view all the answers

    What is the equation for cellular respiration?

    <p>$C6H12O6 + 6O2 \rightarrow 6CO2 + 6H2O$</p> Signup and view all the answers

    Where does the 6th step of the Krebs cycle take place?

    <p>Mitochondrial matrix</p> Signup and view all the answers

    Which part of the cell does glycolysis occur in?

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

    What does sodium fluoride do in cellular respiration?

    <p>Stops glycolysis</p> Signup and view all the answers

    What is the purpose of succinate in the Krebs cycle?

    <p>To be oxidized</p> Signup and view all the answers

    Which step of the scientific method involves conducting an experiment to either prove or disprove the hypothesis?

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

    Which type of variable is any characteristic that varies from individual to individual?

    <p>Dependent variable</p> Signup and view all the answers

    What is the purpose of control variables in an experiment?

    <p>To ensure unbiased results</p> Signup and view all the answers

    What is the main function of carbohydrates in living systems?

    <p>Energy storage</p> Signup and view all the answers

    What is the main function of proteins in living systems?

    <p>Enzyme catalysis</p> Signup and view all the answers

    What is the main function of nucleic acids in living systems?

    <p>Genetic information storage</p> Signup and view all the answers

    What is the main function of lipids in living systems?

    <p>Energy storage</p> Signup and view all the answers

    What is the purpose of sample size in an experiment and why is it important?

    <p>To increase statistical power</p> Signup and view all the answers

    What is the function of the objective lens on a microscope?

    <p>To magnify the image</p> Signup and view all the answers

    What is the function of the condenser knob on a microscope?

    <p>To control the amount of light</p> Signup and view all the answers

    Which reagent is used to test for lipids?

    <p>Sudan IV</p> Signup and view all the answers

    What is the function of the condenser knob on a microscope?

    <p>To control the amount of light that reaches the specimen</p> Signup and view all the answers

    What is the field of view equation on a microscope?

    <p>FOV 10x = FOV 4x x total mag 4x</p> Signup and view all the answers

    What is the equation for total magnification on a microscope?

    <p>total magnification = mag objective x mag ocular lens</p> Signup and view all the answers

    What is the function of the iris diaphragm on a microscope?

    <p>To control the amount of light that reaches the specimen</p> Signup and view all the answers

    What is the function of the fine focus knob on a microscope?

    <p>To focus on the specimen</p> Signup and view all the answers

    What reagent is used to test for simple carbohydrates?

    <p>Benedict's test</p> Signup and view all the answers

    What reagent is used to test for proteins?

    <p>Biuret test</p> Signup and view all the answers

    What reagent is used to test for starch?

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

    What reagent is used to test for nucleic acids?

    <p>Dische diphenylamine</p> Signup and view all the answers

    Which part of the cell does the Krebs cycle take place in?

    <p>Mitochondrial matrix</p> Signup and view all the answers

    What is the purpose of sodium fluoride in cellular respiration?

    <p>Inhibits glycolysis</p> Signup and view all the answers

    What is the purpose of succinate in the Krebs cycle?

    <p>Regenerates oxaloacetate</p> Signup and view all the answers

    What is the purpose of paper chromatography in separating pigments?

    <p>To separate pigments based on their solubility and attachment to chromatography paper</p> Signup and view all the answers

    What is the equation for photosynthesis?

    <p>6CO2 + 6H2O → C6H12O6 + 6O2</p> Signup and view all the answers

    What is the equation for cellular respiration?

    <p>C6H12O6 + 6O2 → 6CO2 + 6H2O</p> Signup and view all the answers

    Where does the 6th step of the Krebs cycle take place?

    <p>Mitochondrial matrix</p> Signup and view all the answers

    Which part of the cell does glycolysis occur in?

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

    What is the main function of plant pigments?

    <p>To absorb energy from light</p> Signup and view all the answers

    What does sodium fluoride do in cellular respiration?

    <p>Inhibits glycolysis</p> Signup and view all the answers

    Which reagent is used to test for proteins?

    <p>Biuret test</p> Signup and view all the answers

    What is the function of the iris diaphragm on a microscope?

    <p>To control the amount of light that reaches the specimen</p> Signup and view all the answers

    What is the equation for total magnification on a microscope?

    <p>Total magnification = mag objective x mag ocular lens</p> Signup and view all the answers

    What is the function of the arms on a microscope?

    <p>To connect to the base and to the head and the eyepiece</p> Signup and view all the answers

    What is the function of the stage clips on a microscope?

    <p>To hold slides in place</p> Signup and view all the answers

    Which step of the scientific method involves conducting an experiment to prove or disprove the hypothesis?

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

    What is the function of the iris diaphragm on a microscope?

    <p>To control the amount of light passing through the specimen</p> Signup and view all the answers

    What is the main function of plant pigments?

    <p>To capture sunlight for photosynthesis</p> Signup and view all the answers

    What is the equation for cellular respiration?

    <p>C6H12O6 + 6O2 -&gt; 6CO2 + 6H2O + ATP</p> Signup and view all the answers

    What is the purpose of sodium fluoride in cellular respiration?

    <p>To inhibit the production of ATP</p> Signup and view all the answers

    Which part of the cell does the Krebs cycle take place in?

    <p>Mitochondrial matrix</p> Signup and view all the answers

    What does sodium fluoride do in cellular respiration?

    <p>Inhibits glycolysis</p> Signup and view all the answers

    What is the purpose of plant pigments?

    <p>Absorb the energy from the light</p> Signup and view all the answers

    What is the equation for photosynthesis?

    <p>6CO2 + 6H2O → C6H12O6 + 6O2</p> Signup and view all the answers

    What is the equation for cellular respiration?

    <p>C6H12O6 + 6O2 → 6CO2 + 6H2O</p> Signup and view all the answers

    True or false: Benedict's test is used to test for simple carbohydrates and results in an orange/red color.

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

    True or false: Biuret test is used to test for proteins and results in a violet color.

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

    True or false: Iodine test is used to test for starch and results in a dark purple color.

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

    True or false: Sudan IV test is used to test for lipids and results in a red color.

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

    True or false: Dische diphenylamine test is used to test for nucleic acids and results in a blue color.

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

    The 6th step of the Krebs cycle involves the conversion of succinate to fumarate.

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

    Glycolysis takes place in the cytoplasm of the cell.

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

    Sodium fluoride stops glycolysis.

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

    The purpose of plant pigments is to absorb energy from light for controlled photosynthesis.

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

    The equation for photosynthesis is $6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$.

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

    True or false: The scientific method steps in order are Observation, Questions, Hypothesis, Experiment, Conclusion, and Report and Publish?

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

    True or false: The hypothesis in the scientific method is an educated guess based on previous experiments and study of literature?

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

    True or false: Controls in an experiment are essential for unbiased results and can include cells that receive no treatment?

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

    True or false: The independent variable is a characteristic that varies from individual to individual and can include the amount of water given to plants?

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

    True or false: The sample size in an experiment refers to the number of participants or observations included in the study and it directly influences research findings?

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

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