(A) NADP reductase: This enzyme is located on the stroma side of the thylakoid membrane. However, it is associated with Photosystem I (PS I). According to standard texts (e.g., NCERT), stroma lamellae membranes lack PS II and NADP reductase. This is why only cyclic photophosphorylation occurs there. Thus, placing it in stroma lamellae is a mismatch.
(B) PEPcase: Found in the cytosol of Mesophyll cells in C plants. Correct.
(C) RuBisCO: Found in the Bundle sheath cells of C plants (and mesophyll of C ). Correct.
(D) ATP synthetase: Found in the thylakoid membrane of the Chloroplast. Correct.
Step 2: Conclusion:
Option (A) is the mismatched pair because the enzyme is absent in stroma lamellae.
02
PYQ 2025
medium
botanyID: ts-eamce
The oxygenation activity of RuBisCo enzyme in photorespiration forms
1
1 molecule of 4-C compound and 1 molecule of 2-C compound
2
1 molecule of 6-C compound
3
1 molecule of 3-C compound and 1 molecule of 2-C compound
4
2 molecules of 3-C compound
Official Solution
Correct Option:
(1)
During photorespiration, RuBisCo catalyzes oxygenation of RuBP (5-C) in the presence of O{2}. This reaction produces one molecule of 3-phosphoglycerate (3-C) and one molecule of 2-phosphoglycolate (2-C). 2-phosphoglycolate is further metabolized in peroxisomes and mitochondria, releasing CO{2}. This reduces photosynthetic efficiency.
03
PYQ 2025
medium
botanyID: ts-eamce
Observe the chemical reaction and identify the enzyme and its prosthetic group:
Official Solution
Correct Option:
(1)
1. Catalase catalyzes decomposition of H2O2 into H2O and O2. 2. Catalase requires Haem as prosthetic group for redox reaction. 3. Peroxidase, Hexokinase, Urease act on different substrates. 4. Hence correct answer is (2) Catalase, Haem.
About Microbes - TS-EAMCET
Microbes is a vital chapter for TS-EAMCET aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.
By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.
Frequently Asked Questions
Why focus on Microbes PYQs?
Analyzing PYQs for this specific chapter reveals the most frequently tested concepts and the typical complexity of questions, allowing you to tailor your study plan efficiently.
How to best use this analysis?
Review the topic breakdown to see which sub-topics within Microbes carry the most weight. Then, tackle the questions iteratively to solidify your understanding.
