Practice Quiz or MCQ (Multiple Choice Questions) with Solutions of Chapter "Respiration (Life Processes)" are available for CBSE Class 10 Science and have been compiled as per the syllabus of CBSE Class 10 ScienceQ. Vocal cards occur in –a)Pharynxb)Larynxc)Glottisd)Bronchial tubeCorrect answer is option 'B'. Can you explain this answer?

Question

Practice Quiz or MCQ (Multiple Choice Questions) with Solutions of Chapter "Respiration (Life Processes)" are available for CBSE Class 10 Science and have been compiled as per the syllabus of CBSE Class 10 ScienceQ. Vocal cards occur in &ndash;a)Pharynxb)Larynxc)Glottisd)Bronchial tubeCorrect answer is option 'B'. Can you explain this answer?

Answer

Ans B bcoz The vocal folds, also known commonly as vocal cords or voice reeds,They vibrate, modulating the flow of air being expelled from the lungs during phonation.

Answer

5x-3

Answer

Larnyx is known as the voice box. vocal cords is somewhat associated with voice. so it is located in larnyx

Answer

Larynx are called voice box and they contain 4 vocal chords but they occur in paid 2 pairs

Answer

Yes ......Answer is 'B'

Answer

Chlorophyll in Photosynthesis

Introduction:
Chlorophyll is a pigment found in the chloroplasts of plants and other photosynthetic organisms. It plays a crucial role in the process of photosynthesis, which is the conversion of light energy into chemical energy in the form of glucose.

Function of Chlorophyll:
The primary function of chlorophyll in photosynthesis is to absorb light energy from the sun. This absorbed energy is then used to power the conversion of carbon dioxide (CO2) and water (H2O) into glucose and oxygen. This process occurs in the chloroplasts, specifically in the thylakoid membrane where chlorophyll molecules are located.

Absorption of Light:
Chlorophyll molecules are capable of absorbing light from the visible spectrum, particularly in the red and blue regions. This is why plants appear green to our eyes because chlorophyll reflects green light while absorbing other colors. The absorbed light energy is then transferred to the reaction center of the chlorophyll molecule, initiating the process of photosynthesis.

Photosynthesis Process:
Once the light energy is absorbed by chlorophyll, it is used to split water molecules into hydrogen (H+) ions, electrons (e-), and oxygen (O2). This process is known as photolysis. The electrons and H+ ions are then used in the light-dependent reactions to generate energy-rich molecules such as ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate).

Reduction of CO2:
In the light-independent reactions, also known as the Calvin cycle or the dark reactions, the ATP and NADPH produced in the light-dependent reactions are used to convert carbon dioxide (CO2) into glucose. This is achieved through a series of chemical reactions that involve the incorporation of carbon atoms into organic molecules.

Conclusion:
In conclusion, the chlorophyll in photosynthesis is primarily used for absorbing light energy. This absorbed energy is then utilized to drive the conversion of carbon dioxide and water into glucose and oxygen. Chlorophyll plays a crucial role in capturing sunlight and initiating the process of photosynthesis, which is essential for the survival of plants and the production of oxygen in the atmosphere.

Answer

The Function of Chlorophyll in Photosynthesis

Chlorophyll is a pigment found in the chloroplasts of plants and algae. It plays a crucial role in the process of photosynthesis, which is the process by which plants convert light energy into chemical energy. The main function of chlorophyll in photosynthesis is to absorb light.

Absorbing Light

Chlorophyll molecules are able to absorb light energy from the sun. They are particularly effective at capturing light in the blue and red regions of the visible spectrum, while reflecting green light. This is why plants appear green to our eyes.

When chlorophyll molecules absorb light energy, the energy is transferred to the electrons within the molecule, exciting them to a higher energy state. These energized electrons then participate in a series of chemical reactions that ultimately convert light energy into chemical energy in the form of ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate).

Photosynthesis Process

The process of photosynthesis involves two main stages: the light-dependent reactions and the light-independent reactions (also known as the Calvin cycle).

In the light-dependent reactions, chlorophyll absorbs light energy and uses it to split water molecules into oxygen and hydrogen ions. This process is known as photolysis. The oxygen is released as a byproduct, while the hydrogen ions are used to generate ATP and NADPH.

In the light-independent reactions, ATP and NADPH produced in the previous stage are utilized to convert carbon dioxide (CO2) into glucose. This process is known as carbon fixation and occurs in the stroma of the chloroplasts.

Conclusion

In conclusion, the primary function of chlorophyll in photosynthesis is to absorb light energy. This absorbed energy is then used to drive the chemical reactions that convert carbon dioxide and water into glucose, releasing oxygen as a byproduct. Without chlorophyll, plants would not be able to carry out photosynthesis and would not be able to produce the energy they need to grow and survive.

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