Photosynthesis Quiz - 9th Grade - Msjh
.
Questions and Answers
- 1.
Photosynthesis transforms ________ energy into ________ energy.
Explanation
Photosynthesis is the process by which plants convert sunlight energy into chemical energy. This energy is stored in the form of glucose, which is a type of chemical energy. Therefore, the correct answer is sunlight, chemical.Rate this question:
- 2.
Photosynthesis produces: ________ sugars and ________ gas
Explanation
Photosynthesis is the process by which plants convert sunlight into energy in the form of sugars. This energy is stored in the plant and used for growth and other metabolic activities. Additionally, during photosynthesis, plants release oxygen gas as a byproduct. Therefore, the correct answer is "energy, oxygen."Rate this question:
- 3.
In Photosynthesis, Oxygen gas is released and CO2 is absorbed through ________
Explanation
Stomata are small openings on the surface of leaves and stems that allow for the exchange of gases, such as oxygen and carbon dioxide, between the plant and its surroundings. During photosynthesis, oxygen gas is released as a byproduct, while carbon dioxide is absorbed through the stomata for use in the process. Therefore, the correct answer is stomata.Rate this question:
- 4.
Photosynthesis equation (write all in capital letters)With the help of Light + Chlorophyll6CO2 + ________ ----------> ________ + 6O2 + ________H2O
Explanation
The photosynthesis equation is written in capital letters. It states that with the help of light and chlorophyll, 6CO2 and 12H2O are converted into C6H12O6 and 6O2. This equation represents the process of photosynthesis, where carbon dioxide and water are converted into glucose and oxygen using light energy and chlorophyll.Rate this question:
- 5.
Light is a form of energy known as ________ radiation.
Explanation
Light is a form of energy that travels in waves and can be described as electromagnetic radiation. This means that light consists of both electric and magnetic fields that oscillate perpendicular to each other and propagate through space. Electromagnetic radiation includes a wide range of wavelengths, from radio waves to gamma rays, with visible light falling within a specific range. Therefore, "electromagnetic" is the correct answer to describe light as a form of energy.Rate this question:
- 6.
Lowest wavelength in visible light spectrum is ________ nmHighest wavelength in visible light spectrum is ________ nm
Explanation
The lowest wavelength in the visible light spectrum is 380 nm, which corresponds to the color violet. The highest wavelength in the visible light spectrum is 750 nm, which corresponds to the color red.Rate this question:
- 7.
When light strikes an object its is either reflected, ________ or ________.
Explanation
When light strikes an object, it can either be transmitted or absorbed. Transmitted light refers to the light that passes through the object without being significantly affected or scattered. This means that the object is transparent or translucent, allowing light to pass through it. On the other hand, absorbed light refers to the light that is taken in by the object, converting its energy into other forms such as heat. This happens when the object is opaque and does not allow light to pass through it.Rate this question:
- 8.
Substances that ________ visible light are called pigments
Explanation
Pigments are substances that have the ability to absorb visible light. When light interacts with pigments, they absorb certain wavelengths of light and reflect or transmit others, giving them their characteristic color. This absorption of light by pigments is what allows them to appear colorful and vibrant.Rate this question:
- 9.
Chlorophyll a, absorbs red and ________ light
Explanation
Chlorophyll a is a pigment found in plants that plays a crucial role in photosynthesis. It absorbs light energy from the sun to convert it into chemical energy. Chlorophyll a primarily absorbs red and blue-violet light, while reflecting green light, which is why plants appear green to our eyes. The absorption of blue-violet light by chlorophyll a is essential for driving the photosynthetic process and is crucial for plant growth and development.Rate this question:
- 10.
The light which can't be absorbed by chlorophyll a is absorbed by chlorophyll b and ________.
Explanation
Chlorophyll a and chlorophyll b are the two primary pigments responsible for capturing light energy in plants. However, there are certain wavelengths of light that chlorophyll a cannot absorb efficiently. In order to maximize light absorption, chlorophyll b and carotenoids come into play. Carotenoids are accessory pigments that can absorb light at different wavelengths than chlorophyll a and b. Therefore, when chlorophyll a cannot absorb a particular wavelength of light, chlorophyll b and carotenoids step in to absorb and transfer that energy to the chlorophyll molecules, ensuring efficient photosynthesis.Rate this question:
- 11.
Chlorophyll b and carotenoids are also called ________ pigments. They pass the photon energy to chlorophyll a, ________ the spectrum that can effectively drive photosynthesis
Explanation
Chlorophyll b and carotenoids are referred to as accessory pigments because they assist chlorophyll a in capturing light energy for photosynthesis. They broaden the spectrum of light that can be absorbed, allowing the plant to utilize a wider range of wavelengths for energy conversion.Rate this question:
- 12.
When modelling a "chlorophyll a" molecule, it consists of 3 parts -a ________ ring, a ________ atom and a ________ tail
Explanation
When modelling a "chlorophyll a" molecule, it consists of a porphyrin ring, a magnesium atom, and a hydrocarbon tail. The porphyrin ring is a large cyclic structure that contains four nitrogen atoms and forms the core of the molecule. The magnesium atom is located at the center of the porphyrin ring and is essential for the molecule's function in photosynthesis. The hydrocarbon tail extends from the porphyrin ring and is responsible for anchoring the molecule to the thylakoid membrane in chloroplasts.Rate this question:
- 13.
In plants and photosynthetic ________, photosynthesis takes place in ________-bound organelles called ________.
Explanation
In plants and photosynthetic protists, photosynthesis takes place in membrane-bound organelles called chloroplasts. Chloroplasts are responsible for capturing sunlight and converting it into energy through the process of photosynthesis. They contain a green pigment called chlorophyll, which absorbs light energy and initiates the chemical reactions necessary for photosynthesis. The membrane surrounding the chloroplasts helps to maintain the integrity of the organelle and regulate the movement of molecules in and out of the chloroplasts.Rate this question:
- 14.
In photosynthetic bacteria, the reactions of photosynthesis take place within ______________.
- A.
Discrete organelle
- B.
Cell itself
- C.
Chloroplast
- D.
Membrane bound organelle
Correct Answer
B. Cell itselfExplanation
Photosynthetic bacteria do not have chloroplasts like plants do. Instead, they carry out photosynthesis within their cell membrane. The cell membrane contains the necessary pigments and enzymes for the reactions of photosynthesis to occur. Therefore, the correct answer is "cell itself."Rate this question:
-
- 15.
The interior of the chloroplast consists ofa) flattened sacs called ________, which in places are ________ into structures called ________.b) ________ (fluid) outside the ________.
Correct Answer
thylakoids, stacked, grana, stroma, thylakoidsExplanation
The interior of the chloroplast consists of flattened sacs called thylakoids, which in places are stacked into structures called grana. The fluid outside the thylakoids is called stroma. The thylakoids are responsible for the light-dependent reactions of photosynthesis, while the stroma is where the light-independent reactions occur. The arrangement of thylakoids into grana allows for a larger surface area for the absorption of light and the production of energy-rich molecules.Rate this question:
- 16.
Grana are stacks of thylakoid membranes containing ________.
Correct Answer
chlorophyllExplanation
Grana are stacks of thylakoid membranes, which contain chlorophyll. Chlorophyll is a pigment found in plants and other photosynthetic organisms that is responsible for capturing light energy during photosynthesis. It is located within the thylakoid membranes, specifically in the photosystems, where it helps to absorb light and convert it into chemical energy. Therefore, the presence of chlorophyll within the thylakoid membranes of grana is essential for the process of photosynthesis to occur efficiently.Rate this question:
- 17.
The liquid interior of chloroplast is called ________.
Correct Answer
stromaExplanation
The liquid interior of chloroplast is called stroma. The stroma is a gel-like substance that fills the space inside the chloroplast, surrounding the thylakoid membranes where the light-dependent reactions of photosynthesis occur. It contains enzymes and other molecules necessary for the synthesis of carbohydrates during the light-independent reactions of photosynthesis. The stroma also plays a role in the regulation of carbon dioxide uptake and release, as well as the storage of starch granules.Rate this question:
- 18.
The light dependent phase occurs in the ________ membranes of a chloroplast.The light independent phase occurs in the ________ of chloroplasts
Correct Answer
thylakoid, stromaExplanation
The light dependent phase occurs in the thylakoid membranes of a chloroplast. This is where light energy is absorbed by chlorophyll and converted into chemical energy in the form of ATP and NADPH. The thylakoid membranes contain the necessary pigments and proteins for the light-dependent reactions to take place. On the other hand, the light independent phase, also known as the Calvin cycle, occurs in the stroma of chloroplasts. In this phase, the ATP and NADPH produced in the light dependent phase are used to convert carbon dioxide into glucose through a series of enzyme-mediated reactions.Rate this question:
- 19.
In photosynthesis, Carbon dioxide from the air provides carbon and oxygen as raw materials. Carbon is fixed in the Light ________ phase.
Correct Answer
independentExplanation
In photosynthesis, carbon dioxide from the air is utilized as a raw material to provide carbon for the process. This carbon is then fixed in the light-independent phase of photosynthesis. During this phase, the carbon dioxide is converted into organic molecules, such as glucose, through a series of chemical reactions that do not directly require light.Rate this question:
- 20.
The ________ in green plants are protein complexes used to harvest light energy so it can be converted into ________ energy in the ________ of the chloroplasts.
Correct Answer
photosystems, chemical, thylakoidsExplanation
Photosystems are protein complexes in green plants that are used to harvest light energy. This light energy is then converted into chemical energy in the thylakoids of the chloroplasts. Thylakoids are membrane-bound compartments within the chloroplasts where photosynthesis takes place.Rate this question:
- 21.
During photosynthesis, chemical energy is stored in - ________ and NADPH.NADPH is ________ Adenine ________ ________
Correct Answer
nicotinamide, dinucleotide, phosphateExplanation
During photosynthesis, chemical energy is stored in molecules called nicotinamide adenine dinucleotide phosphate (NADPH). NADPH acts as a carrier of energy and electrons, which are used in the synthesis of glucose and other organic compounds. It plays a crucial role in the light-dependent reactions of photosynthesis, where it is produced by the reduction of NADP+ through the transfer of electrons from water molecules. The energy stored in NADPH is then used in the Calvin cycle, where it provides the necessary reducing power for the synthesis of sugars.Rate this question:
- 22.
When chlorophyll molecules absorb light, an electron is excited to a ________ level. This electron “________” must be filled.
Correct Answer
higher, holeExplanation
When chlorophyll molecules absorb light, an electron is excited to a higher energy level. This electron "hole" must be filled.Rate this question:
- 23.
In Electron transport chain: Each electron is passed from one electron carrier to another; ________ energy as it goes. This energy is used to pump ________ ions across the thylakoid membrane.
Correct Answer
losing, hydrogenExplanation
In the electron transport chain, each electron loses energy as it is passed from one electron carrier to another. This energy is used to pump hydrogen ions across the thylakoid membrane.Rate this question:
- 24.
ATP synthase catalyzes the production of ATP from ________ and inorganic ________.
Correct Answer
ADP, phosphateExplanation
ATP synthase is an enzyme that plays a crucial role in cellular respiration by catalyzing the production of ATP. It does so by combining ADP (adenosine diphosphate) and inorganic phosphate (Pi) to form ATP. ADP is a molecule that has already been used to transfer energy and needs to be replenished, while inorganic phosphate is a necessary component for the synthesis of ATP. Therefore, the correct answer is ADP and phosphate.Rate this question:
- 25.
Photolysis of water: In noncyclic ________, the electrons lost to the electron transport chain are replaced by splitting a water molecule (photolysis) releasing oxygen gas and hydrogen ions.
Correct Answer
phosphorylationExplanation
In noncyclic phosphorylation, the electrons lost to the electron transport chain are replaced by splitting a water molecule (photolysis) releasing oxygen gas and hydrogen ions. This process is crucial for the production of ATP during photosynthesis.Rate this question:
- 26.
Flow of H+ back across the membrane is coupled to ATP synthesis by ________.
Correct Answer
chemiosmosisExplanation
Chemiosmosis is the process in which the flow of H+ ions back across the membrane is coupled to ATP synthesis. During chemiosmosis, H+ ions are pumped across the membrane, creating an electrochemical gradient. The H+ ions then flow back across the membrane through ATP synthase, which uses the energy from this flow to produce ATP. This process is crucial for cellular respiration and photosynthesis, as it allows for the production of ATP, the main energy currency of the cell.Rate this question:
- 27.
Light Dependent Phase:In the thylakoid, light reactions use the energy of ________ to split water molecules. ________ is waste and the ________ ions are used to make ________ and NADPH. These are discharged into the ________.
Correct Answer
photons, oxygen, hydrogen, ATP, stromaExplanation
In the light-dependent phase of photosynthesis, photons of light are used to split water molecules. Oxygen is produced as waste, and the hydrogen ions are used to generate ATP and NADPH. These ATP and NADPH molecules are then released into the stroma, where they are used in the subsequent dark reactions of photosynthesis.Rate this question:
- 28.
The ATP and NADPH are used in the ________ Cycle.
Correct Answer
calvinExplanation
The ATP and NADPH molecules are utilized in the Calvin cycle. This cycle is a series of reactions that occur in the chloroplasts of plants during photosynthesis. During the Calvin cycle, carbon dioxide is converted into glucose using the energy from ATP and the reducing power of NADPH. This process is essential for plants to produce organic molecules and store energy in the form of glucose.Rate this question:
- 29.
During the Calvin Cycle, the enzyme ________ does the work of reducing carbon dioxide from the atmosphere.
Correct Answer
RuBisCoExplanation
During the Calvin Cycle, the enzyme RuBisCo plays a crucial role in reducing carbon dioxide from the atmosphere. RuBisCo catalyzes the first step of the cycle, where it combines carbon dioxide with a five-carbon sugar molecule called ribulose bisphosphate (RuBP). This reaction forms a six-carbon molecule that immediately splits into two molecules of a three-carbon compound called 3-phosphoglycerate. These compounds are then further converted and rearranged to produce glucose, which can be used by the plant for energy and growth. Therefore, RuBisCo is essential in capturing and converting atmospheric carbon dioxide into organic compounds during photosynthesis.Rate this question:
- 30.
The carbohydrates produced during the Calvin cycle can be stored to provide energy for use at a later stage. Carbon fixation does not require ________ to proceed. However, it does require the ________ and ATP that are supplied by the light dependent phase.
Correct Answer
light, H+Explanation
During the Calvin cycle, carbohydrates are produced and can be stored for later use as energy. Carbon fixation, the process of converting carbon dioxide into organic molecules, does not require light to occur. However, it does require the protons (H+) and ATP that are generated during the light-dependent phase. These products of the light-dependent phase are essential for the Calvin cycle to proceed and for the conversion of carbon dioxide into carbohydrates.Rate this question:
- 31.
The ________ pigment loses its electrons after other pigments transfer energy to it.
Correct Answer
chlorophyllExplanation
Chlorophyll is the pigment responsible for capturing light energy during photosynthesis. When other pigments transfer energy to chlorophyll, it becomes excited and loses its electrons. This electron transfer process is crucial for the conversion of light energy into chemical energy, which is used to fuel the synthesis of glucose and other organic compounds in plants.Rate this question:
Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
-
Current Version
-
Jul 15, 2023Quiz Edited by
ProProfs Editorial Team -
Nov 07, 2017Quiz Created by
ANAND PRAKASH