Chapter 7 Biology Test

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  • 1/30 Questions

    Autotrophs are?

    • Photosynthesis
    • Are organisms capable of making their own food, thus called producers (anything than can make its own food photosynthetic)
    • Occurs in the chloroplasts
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About This Quiz

This Chapter 7 Biology test assesses understanding of cellular processes such as cell respiration and photosynthesis. It evaluates knowledge on energy conversion in cells and the autotrophic ability to produce food, essential for students studying advanced biology.

Chapter 7 Biology Test - Quiz

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  • 2. 

    Photosynthesis occurs in the chloroplasts.

    • Yes

    • No

    Correct Answer
    A. Yes
    Explanation
    Photosynthesis is a process that takes place in the chloroplasts of plant cells. Chloroplasts contain a pigment called chlorophyll, which captures sunlight energy and converts it into chemical energy through a series of reactions. This chemical energy is then used to convert carbon dioxide and water into glucose and oxygen. Therefore, it is correct to say that photosynthesis occurs in the chloroplasts.

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  • 3. 

    Photosystems II and I are where the light-dependent reactions take place.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Photosystems II and I are where the light-dependent reactions take place. This statement is true. Photosystems II and I are protein complexes found in the thylakoid membrane of chloroplasts. They are responsible for capturing and absorbing light energy during photosynthesis. Photosystem II functions first and absorbs light energy to initiate the electron transport chain. Photosystem I then receives the energized electrons from Photosystem II and uses them to produce ATP and NADPH, which are essential for the light-dependent reactions of photosynthesis. Therefore, Photosystems II and I are indeed where the light-dependent reactions occur.

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  • 4. 

    Light Dependent and Light-independent all occurs in the Chloroplast:

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The statement is true because both light-dependent and light-independent reactions occur in the chloroplast. The light-dependent reactions take place in the thylakoid membrane of the chloroplast and require sunlight to convert light energy into chemical energy in the form of ATP and NADPH. These energy-rich molecules are then used in the light-independent reactions, also known as the Calvin cycle, which occur in the stroma of the chloroplast. In the Calvin cycle, carbon dioxide is fixed and converted into glucose with the help of ATP and NADPH produced in the light-dependent reactions. Therefore, both types of reactions occur within the chloroplast.

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  • 5. 

    The Calving Cycle converts C02 to Sugars:

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The statement is true because the calving cycle refers to the process in which icebergs break off from glaciers and enter the ocean. During this process, large amounts of carbon dioxide (CO2) are trapped within the ice. Once the ice melts in the ocean, the CO2 is released and can be used by marine plants, such as phytoplankton, to carry out photosynthesis. Through photosynthesis, these plants convert CO2 into sugars, which are essential for their growth and survival. Therefore, the calving cycle indirectly contributes to the conversion of CO2 into sugars.

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  • 6. 

    Do all animals have cell respiration?

    • Yes

    • No

    Correct Answer
    A. Yes
    Explanation
    All animals have cell respiration because it is a fundamental process that occurs in all living organisms, including animals. Cell respiration is the process by which cells break down glucose and convert it into energy in the form of ATP. This energy is essential for carrying out various cellular functions and maintaining the overall metabolic activities of an animal. Without cell respiration, animals would not be able to survive and perform essential life processes. Therefore, it can be concluded that all animals have cell respiration.

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  • 7. 

    Photosynthesis occurs in the chloroplast of plant leaves, cells of algae and plasma membranes of bacteria.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Photosynthesis is the process by which plants, algae, and some bacteria convert sunlight into chemical energy to fuel their growth and survival. It takes place in specialized organelles called chloroplasts in plant leaves, the cells of algae, and the plasma membranes of bacteria. These structures contain the necessary pigments, such as chlorophyll, to capture sunlight and initiate the biochemical reactions involved in photosynthesis. Therefore, the statement that photosynthesis occurs in the chloroplast of plant leaves, cells of algae, and plasma membranes of bacteria is true.

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  • 8. 

    Light Independent Reaction needs:

    • C02,ATP, NADPH

    • G3P(Sugar) Output

    • Pre-Cursor to glucose

    Correct Answer
    A. C02,ATP, NADPH
    Explanation
    The light-independent reaction, also known as the Calvin cycle, is a process in photosynthesis that occurs in the stroma of the chloroplast. It requires carbon dioxide (CO2), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH) as inputs. During this reaction, CO2 is fixed and converted into a three-carbon molecule called G3P, which is then used to produce glucose and other organic compounds. Therefore, the correct answer is CO2, ATP, and NADPH, as these are the essential components needed for the light-independent reaction to occur and produce G3P, which serves as a precursor to glucose.

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  • 9. 

    Do all cells have cell respiration?

    • Yes

    • No

    Correct Answer
    A. Yes
    Explanation
    All cells have cell respiration because it is the process by which cells convert glucose and oxygen into energy in the form of ATP. This process occurs in the mitochondria of cells and is essential for the survival and functioning of cells. Without cell respiration, cells would not be able to produce the energy needed for their various activities and processes. Therefore, it can be concluded that all cells have cell respiration.

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  • 10. 

    Photosynthesis is?

    • Light reactions

    • Converting solar energy into chemical energy

    • Calvin cycle

    Correct Answer
    A. Converting solar energy into chemical energy
    Explanation
    Photosynthesis is the process by which plants and some other organisms convert solar energy into chemical energy. This energy is stored in the form of glucose and other organic compounds, which can be used by the organism for growth, development, and other metabolic processes. During photosynthesis, light energy is captured by chlorophyll in the chloroplasts of plant cells, and this energy is used to convert carbon dioxide and water into glucose and oxygen. This process is essential for the survival of plants and is also responsible for producing the oxygen we breathe.

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  • 11. 

    Stoma is:

    • The opening for gas exchanges

    • Proton pump

    • Electron transport chain

    Correct Answer
    A. The opening for gas exchanges
    Explanation
    The correct answer is "The opening for gas exchanges" because a stoma is a tiny pore found on the surface of leaves and stems of plants. It allows for the exchange of gases, such as carbon dioxide and oxygen, between the plant and its environment. Through the process of photosynthesis, plants take in carbon dioxide and release oxygen, and this exchange occurs through the stomata.

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  • 12. 

    When water is split we get oxygen gas?

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Water can be split through a process called electrolysis, where an electric current is passed through the water. During this process, water molecules are broken down into their constituent elements, hydrogen and oxygen. The hydrogen gas is collected at the cathode, while the oxygen gas is collected at the anode. Therefore, when water is split, we do indeed get oxygen gas as one of the products.

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  • 13. 

    Light reaction:

    • Light energy is converted to chemical energy converted to chemical energy and occurs on thylakoind membrane of chloroplasts.

    • Uses chemical energy to make sugars and occurs in the storma of chloroplasts

    • Photosynthesis occurs in the chloroplast of plant leaves, cells of algae and plasma membranes of bacteria.

    Correct Answer
    A. Light energy is converted to chemical energy converted to chemical energy and occurs on thylakoind membrane of chloroplasts.
    Explanation
    The light reaction of photosynthesis is the process in which light energy is converted into chemical energy. This conversion takes place on the thylakoid membrane of chloroplasts. The thylakoid membrane contains pigments such as chlorophyll that are responsible for capturing light energy. This energy is then used to power the production of ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate), which are energy-rich molecules that will be used in the next stage of photosynthesis, the Calvin cycle. Therefore, the correct answer states that light energy is converted to chemical energy on the thylakoid membrane of chloroplasts.

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  • 14. 

    Do the roots of the plants do cell respiration?

    • Yes

    • No

    Correct Answer
    A. Yes
    Explanation
    Plants have cells, and like any other living organism, their cells undergo cellular respiration. This process occurs in the roots of plants as well, where the cells break down glucose to produce energy in the form of ATP. The roots of plants require energy for various functions such as nutrient uptake, growth, and maintenance. Therefore, it can be concluded that the roots of plants do undergo cell respiration.

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  • 15. 

    In the process of cellular respiration, which of the following statements accurately describes the role of the electron transport chain (ETC) in the mitochondria?

    • The ETC directly generates ATP by substrate-level phosphorylation.

    • The ETC converts glucose into pyruvate, which then enters the mitochondria.

    • The ETC transfers high-energy electrons through a series of proteins, creating a proton gradient that drives ATP synthesis.

    • The ETC functions exclusively in the cytoplasm of the cell, not in the mitochondria.

    Correct Answer
    A. The ETC transfers high-energy electrons through a series of proteins, creating a proton gradient that drives ATP synthesis.
    Explanation
    The electron transport chain (ETC) in mitochondria transfers high-energy electrons through a series of proteins, creating a proton gradient across the inner mitochondrial membrane. This gradient drives ATP synthesis through chemiosmosis, making C the correct answer. A is incorrect as ATP is synthesized by oxidative phosphorylation, not substrate-level phosphorylation. B describes glycolysis, not the ETC. D is incorrect because the ETC occurs in the mitochondria, not the cytoplasm.

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  • 16. 

    Dark reaction is:

    • Uses chemical energy to make sugars and occurs in the storma of chloroplasts

    • Light energy is converted to chemical energy converted to chemical energy and occurs on thylakoind membrane of chloroplasts.

    • Photosynthesis occurs in the chloroplast of plant leaves, cells of algae and plasma membranes of bacteria.

    Correct Answer
    A. Uses chemical energy to make sugars and occurs in the storma of chloroplasts
    Explanation
    The dark reaction, also known as the Calvin cycle, is a process in photosynthesis where chemical energy, in the form of ATP and NADPH, is used to convert carbon dioxide into sugars. This reaction occurs in the stroma of chloroplasts, which is the fluid-filled region outside the thylakoid membranes. The dark reaction does not require light directly, but it relies on the products of the light-dependent reactions, such as ATP and NADPH, which are generated on the thylakoid membrane. Therefore, the correct answer states that the dark reaction uses chemical energy to make sugars and occurs in the stroma of chloroplasts.

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  • 17. 

    Dark reaction is also know as the "Calvin Cycle"

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The given statement is true. The dark reaction in photosynthesis is also known as the Calvin Cycle. This cycle occurs in the stroma of the chloroplasts and is responsible for converting carbon dioxide into glucose using the energy captured during the light reaction. The Calvin Cycle is a crucial part of the overall process of photosynthesis, as it helps to produce the organic molecules needed for plant growth and development.

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  • 18. 

    Oxidation:

    • Gaining electrons

    • Releasing electrons

    • Reuses energy

    Correct Answer
    A. Releasing electrons
    Explanation
    Oxidation is a chemical process in which a substance loses electrons. When a substance undergoes oxidation, it releases electrons, which are then available for other reactions or to be used as a source of energy. Therefore, the correct answer is "Releasing electrons."

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  • 19. 

    Exergonic:

    • Reuses energy

    • Gaining electrons

    • Releasing electrons

    Correct Answer
    A. Reuses energy
    Explanation
    The correct answer is "Reuses energy" because exergonic reactions are those that release energy. In these reactions, the products have lower energy than the reactants, and the excess energy is often used to perform work or drive other reactions. Therefore, the term "reuses energy" accurately describes the characteristic of exergonic reactions, where energy is not lost but rather utilized for other purposes.

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  • 20. 

    Light reactions are:

    • Converts solar energy to chemical energy

    • Converts CO2 to sugars

    • CAM photosynethesis

    Correct Answer
    A. Converts solar energy to chemical energy
    Explanation
    Light reactions in photosynthesis are the initial phase of the process where solar energy is converted into chemical energy. This energy is captured by chlorophyll molecules in the chloroplasts of plant cells, and is used to split water molecules into oxygen and hydrogen ions. The energy from sunlight is then transferred to ATP and NADPH, which are energy-rich molecules that are used in the second phase of photosynthesis, known as the Calvin cycle, to convert carbon dioxide into sugars. Therefore, the correct answer is that light reactions convert solar energy to chemical energy.

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  • 21. 

    Light comes to us in packets of energy called:

    • Protons

    • Photons

    • Neutrons

    Correct Answer
    A. Photons
    Explanation
    Light comes to us in packets of energy called photons. Photons are the fundamental particles of light and are responsible for carrying electromagnetic radiation. They have zero mass and travel at the speed of light. When an atom or molecule absorbs energy, it can release this energy in the form of photons. These photons can then be detected by our eyes or other light-sensitive devices, allowing us to see and interact with the world around us.

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  • 22. 

    Reduction:

    • Releasing electrons

    • Reuses energy

    • Gaining electrons

    Correct Answer
    A. Gaining electrons
    Explanation
    The correct answer is "Gaining electrons." This is because reduction is a chemical reaction where an atom or molecule gains electrons, which results in a decrease in its oxidation state. In other words, it involves the addition of electrons to a substance. The given options "Releasing electrons" and "Reusing energy" do not accurately describe the process of reduction.

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  • 23. 

    NADpH Reduction:

    • Calvin Cycle is the "Dark Reaction)

    • Supplies electrons and hydrogen's to the Calvin cycle

    • The Calving Cycle converts CO2 to Sugars

    Correct Answer
    A. Supplies electrons and hydrogen's to the Calvin cycle
    Explanation
    The correct answer states that NADPH reduction supplies electrons and hydrogens to the Calvin cycle. This is accurate because NADPH is a molecule that carries high-energy electrons and hydrogen ions. During the Calvin cycle, these electrons and hydrogens are used to convert carbon dioxide into sugars through a series of enzyme-catalyzed reactions. Therefore, NADPH reduction plays a crucial role in providing the necessary reducing power for the synthesis of sugars during the Calvin cycle.

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  • 24. 

    What are the (2) major reaction pathways of photosynthesis:

    • Light reaction

    • Dark reaction

    • Calvin cycle

    Correct Answer(s)
    A. Light reaction
    A. Dark reaction
    Explanation
    The correct answer is Light reaction and Dark reaction. Photosynthesis is a complex process that occurs in plants and some bacteria, and it involves two major reaction pathways. The light reaction, also known as the light-dependent reaction, takes place in the thylakoid membrane of the chloroplasts and requires light energy to convert water into oxygen and ATP. The dark reaction, also known as the light-independent reaction or the Calvin cycle, occurs in the stroma of the chloroplasts and uses ATP and NADPH produced in the light reaction to convert carbon dioxide into glucose. These two reactions work together to produce glucose and oxygen, which are essential for the survival of plants.

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  • 25. 

    Endergonic:

    • Photosynthesis stores energy which equals enderconic reaction

    • Pick up hydrogen and carries it to where we the cell needs it to be

    • Gives you a source of energy, without light

    Correct Answer
    A. Photosynthesis stores energy which equals enderconic reaction
  • 26. 

    NADP:

    • Photosynthesis stores energy which equals enderconic reaction

    • Gives you a source of energy, without light

    • Pick up hydrogen and carries it to where we the cell needs it to be

    Correct Answer
    A. Pick up hydrogen and carries it to where we the cell needs it to be
    Explanation
    The answer is "Pick up hydrogen and carries it to where the cell needs it to be." This is because NADP (nicotinamide adenine dinucleotide phosphate) is a coenzyme involved in photosynthesis. It acts as a carrier molecule, picking up hydrogen ions (H+) produced during the light-dependent reactions of photosynthesis and transporting them to the Calvin cycle (light-independent reactions) where they are used to convert carbon dioxide into glucose. This process helps in the production of energy-rich molecules that the cell needs for various metabolic activities.

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  • 27. 

    Light dependent reactions are:

    • Photysystem II: uses light energy to make ATP

    • Photosystem I: Uses light(chlorophyll electron) energy to form NADPH

    • Proton pump

    Correct Answer
    A. Photysystem II: uses light energy to make ATP
    Explanation
    Photosystem II is responsible for the initial step in the light-dependent reactions of photosynthesis. It absorbs light energy and uses it to split water molecules, releasing oxygen and generating ATP through a process called photophosphorylation. This ATP will later be used in the Calvin cycle to fuel the synthesis of glucose. Therefore, the statement "Photysystem II: uses light energy to make ATP" accurately describes the role of Photosystem II in the light-dependent reactions.

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  • 28. 

    Stoma:

    • Green disk stacks are thylokoid that contain choraphil

    • Openings at the bottom of the plant

    • As photosynthesis occurs takes in CO2 and releases 02

    Correct Answer
    A. Openings at the bottom of the plant
    Explanation
    The correct answer is "Openings at the bottom of the plant". Stoma are small openings found on the surface of plant leaves and stems. They are surrounded by two specialized cells called guard cells. Stomata play a crucial role in gas exchange, allowing the plant to take in carbon dioxide (CO2) for photosynthesis and release oxygen (O2) as a byproduct. However, the given statement is not entirely accurate as stomata are not specifically located at the bottom of the plant, but can be found on various parts of the plant's surface.

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  • 29. 

    Photosynethis uses (3) colors of light:

    • Blue

    • Red

    • Violate

    • Green

    Correct Answer(s)
    A. Blue
    A. Red
    A. Violate
  • 30. 

    Photosynthesis:

    • Converts energy room sun into food

    • Light energy is converted to chemical energy

    • Uses chemical energy to make sugars and occurs in the storma of chlorplasts

    Correct Answer
    A. Converts energy room sun into food
    Explanation
    The process of photosynthesis involves converting energy from the sun into food. This is achieved by converting light energy into chemical energy, which is then used to produce sugars. Photosynthesis occurs in the stroma of chloroplasts.

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  • Sep 01, 2024
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