Photorespiration involved the following reaction which occurs in the sequence of:
Correct answer: C. RuBP + O2 --> Glycolate, Glycolate --> Glycine, Glycine --> Serine + CO2
- A. Glycolate --> Glycine, Glycine --> Serine + CO2, RuBP + O2 --> Glycolate
- B. RuBP + O2 --> Glycolate, Glycine --> Serine + CO2, Glycolate --> Glycine
- C. RuBP + O2 --> Glycolate, Glycolate --> Glycine, Glycine --> Serine + CO2
- D. Glycine --> Serine + CO2, RuBP + O2 --> Glycolate, Glycolate --> Glycine
Explanation
Photorespiration is a process in plants where RuBP (Ribulose Bisphosphate) reacts with oxygen, rather than carbon dioxide, leading to a series of reactions:1. RuBP + O2 --> Glycolate: RuBP oxygenation is the first step, producing glycolate.2. Glycolate --> Glycine: Glycolate is then converted to glycine.3. Glycine --> Serine + CO2: Finally, glycine is converted to serine with the release of CO2.Option C correctly follows this sequence. Options A, B, and D misrepresent the order of these reactions, either starting with or incorrectly placing the reactions, which makes them incorrect.
Last updated
About Plant Nutrition and Transport
Plants require macronutrients and micronutrients for growth, and mineral deficiencies produce recognizable symptoms. Transport involves water and minerals through xylem by transpiration pull, cohesion and adhesion, while phloem translocates sugars from sources to sinks. Root pressure and transpiration are distinct mechanisms.
Practise Forms and Functions of Plants
272 free Forms and Functions of Plants MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
Consider the given molecules.I.NADPHII. ATPIII. CO2In the process of photosynthesis, these molecules are used as inputs in the:
Insectivorous plants are autotrophs which grow in the soil that is deficient in
One of the characteristics of lenticels in woody plants is that they:
In plants, the option that shows the range of environmental temperature and CO2 to O2 ratio which favours photorespiration is:
The pathway through which water moves from root hair cells to the xylem in plants are/is:I. apoplastII. symplastIII. vacuolar