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RuBisCO is...

RuBisCO is

A

RuBP carboxylase

B

RuBP oxygenase

C

RuBP carboxylase-oxygenase

D

RuBP carboxydismutase.

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding RuBisCO**: RuBisCO is an enzyme that plays a crucial role in the process of photosynthesis, specifically in the Calvin cycle. It is responsible for the fixation of carbon dioxide. 2. **Full Form of RuBisCO**: The full name of RuBisCO is Ribulose-1,5-bisphosphate carboxylase/oxygenase. This indicates that it has dual functions: it can act as a carboxylase (fixing carbon dioxide) and as an oxygenase (involved in photorespiration). 3. **Function in Photosynthesis**: RuBisCO catalyzes the first major step of carbon fixation in the Calvin cycle, where it combines carbon dioxide with ribulose-1,5-bisphosphate (RuBP) to form 3-phosphoglycerate (3-PGA). 4. **Importance in Photorespiration**: In addition to its carboxylase activity, RuBisCO can also react with oxygen instead of carbon dioxide, leading to a process called photorespiration, which can reduce the efficiency of photosynthesis. 5. **Conclusion**: Based on the functions and characteristics of RuBisCO, the correct answer to the question is that RuBisCO stands for Ribulose-1,5-bisphosphate carboxylase/oxygenase. **Final Answer**: RuBisCO is Ribulose-1,5-bisphosphate carboxylase/oxygenase. ---
**Step-by-Step Solution:** 1. **Understanding RuBisCO**: RuBisCO is an enzyme that plays a crucial role in the process of photosynthesis, specifically in the Calvin cycle. It is responsible for the fixation of carbon dioxide. 2. **Full Form of RuBisCO**: The full name of RuBisCO is Ribulose-1,5-bisphosphate carboxylase/oxygenase. This indicates that it has dual functions: it can act as a carboxylase (fixing carbon dioxide) and as an oxygenase (involved in photorespiration). 3. **Function in Photosynthesis**: RuBisCO catalyzes the first major step of carbon fixation in the Calvin cycle, where it combines carbon dioxide with ribulose-1,5-bisphosphate (RuBP) to form 3-phosphoglycerate (3-PGA). ...
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Which of the following statement is incorrect? Options O RuBisCO is a bifunctional enzyme,can react with oxygen and carbon dioxide both. O Desert plants do not have RuBisCO enzyme. O Chlorophyll 'a' is essential for photosynthesis. O For glucose synthesis,plants require ATP and NADPH

RuBisCO in C_(4) plants shown minimum oxygenase activity due to

Knowledge Check

  • The enzyme RuBisCO has

    A
    more affinity for `CO_(2)` than for `O_(2)`
    B
    more affinity for `O_(2)`. Than for `O_(2)`
    C
    equal affinity for both
    D
    more affinity for sugars, than for `CO_(2)`

  • CO_(2) combines with RuBP in the presence of enzyme RuBisCO to from 3PGA This process of Calvin cycle is included under

    A
    carboxylation
    B
    oxygenation
    C
    reduction
    D
    regeneration.

    • Similar Questions

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    For which substrate RuBisCO shows greater affinity?

    PEP case and RuBisCo in C_(4) plants are present respectively in

    What conditions enable RuBisCO to function as an oxygenase ? Explain the ensuing process.

    Match the following Column-I a.Zn b.Mo c.Mg d.Fe Column-ll (i).RuBisCO (ii) Catalase (iii) Alcohol dehydrogenase (iv)Nitrogenase

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