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Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.
Assertion : Red algae have chemo-autotrophic mode of nutrition.
Reason : The pigment responsible for red colour of red algae is r-phycoerythrin.
- a)Both A and R are true, and R is the correct explanation of A.
- b)Both A and R are true, but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
Correct answer is option 'D'. Can you explain this answer?
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Directions : In the following question, the Assertions (A) and Reason...
Rhodophyceae (Red algae) are photo-autotrophic in their mode of nutrition. They synthesize food in presence of chlorophyll ‘a’ in their chromatophores or chloroplasts. They contain a red pigment, r- phycoerythrin in their body and hence they appear red.
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Directions : In the following question, the Assertions (A) and Reason...
Red algae have chemo-autotrophic mode of nutrition.
The pigment responsible for red color of red algae is r-phycoerythrin.
Explanation:
Red algae belong to the division Rhodophyta and are known for their red coloration. They are primarily found in marine environments, although some species can also be found in freshwater. Red algae have a special mode of nutrition known as chemo-autotrophy.
Chemo-autotrophy is a type of autotrophic nutrition in which organisms synthesize their own organic molecules using energy obtained from chemical reactions. In the case of red algae, they obtain energy by oxidizing inorganic molecules such as sulfur or nitrogen compounds. This mode of nutrition allows red algae to thrive in environments with low light levels, such as deeper waters.
The pigment responsible for the red color of red algae is called r-phycoerythrin. This pigment belongs to the phycobiliprotein family and is responsible for absorbing light in the blue-green spectrum. It reflects and transmits red light, giving the algae their distinctive red coloration.
The presence of r-phycoerythrin in red algae is an adaptation to their habitat. The blue-green light spectrum penetrates deeper into water, allowing red algae to capture light energy for photosynthesis even in low light conditions. This is advantageous for red algae, as they can photosynthesize and produce their own organic molecules using this absorbed light energy.
Therefore, both the assertion and the reason are true. Red algae do have a chemo-autotrophic mode of nutrition, and the pigment r-phycoerythrin is responsible for their red coloration. However, the reason alone does not provide a direct explanation for the assertion. It simply provides additional information about the pigment responsible for the red color of red algae. Hence, the correct option is D: A is false but R is true.
The pigment responsible for red color of red algae is r-phycoerythrin.
Explanation:
Red algae belong to the division Rhodophyta and are known for their red coloration. They are primarily found in marine environments, although some species can also be found in freshwater. Red algae have a special mode of nutrition known as chemo-autotrophy.
Chemo-autotrophy is a type of autotrophic nutrition in which organisms synthesize their own organic molecules using energy obtained from chemical reactions. In the case of red algae, they obtain energy by oxidizing inorganic molecules such as sulfur or nitrogen compounds. This mode of nutrition allows red algae to thrive in environments with low light levels, such as deeper waters.
The pigment responsible for the red color of red algae is called r-phycoerythrin. This pigment belongs to the phycobiliprotein family and is responsible for absorbing light in the blue-green spectrum. It reflects and transmits red light, giving the algae their distinctive red coloration.
The presence of r-phycoerythrin in red algae is an adaptation to their habitat. The blue-green light spectrum penetrates deeper into water, allowing red algae to capture light energy for photosynthesis even in low light conditions. This is advantageous for red algae, as they can photosynthesize and produce their own organic molecules using this absorbed light energy.
Therefore, both the assertion and the reason are true. Red algae do have a chemo-autotrophic mode of nutrition, and the pigment r-phycoerythrin is responsible for their red coloration. However, the reason alone does not provide a direct explanation for the assertion. It simply provides additional information about the pigment responsible for the red color of red algae. Hence, the correct option is D: A is false but R is true.
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Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Red algae have chemo-autotrophic mode of nutrition.Reason : The pigment responsible for red colour of red algae is r-phycoerythrin.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'D'. Can you explain this answer?
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Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Red algae have chemo-autotrophic mode of nutrition.Reason : The pigment responsible for red colour of red algae is r-phycoerythrin.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Red algae have chemo-autotrophic mode of nutrition.Reason : The pigment responsible for red colour of red algae is r-phycoerythrin.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Red algae have chemo-autotrophic mode of nutrition.Reason : The pigment responsible for red colour of red algae is r-phycoerythrin.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'D'. Can you explain this answer?.
Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Red algae have chemo-autotrophic mode of nutrition.Reason : The pigment responsible for red colour of red algae is r-phycoerythrin.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Red algae have chemo-autotrophic mode of nutrition.Reason : The pigment responsible for red colour of red algae is r-phycoerythrin.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Red algae have chemo-autotrophic mode of nutrition.Reason : The pigment responsible for red colour of red algae is r-phycoerythrin.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'D'. Can you explain this answer?.
Solutions for Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.Assertion : Red algae have chemo-autotrophic mode of nutrition.Reason : The pigment responsible for red colour of red algae is r-phycoerythrin.a)Both A and R are true, and R is the correct explanation of A.b)Both A and R are true, but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET.
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