MPSC PYQ

Photosynthesis

Photosynthesis is an concept from the MPSC syllabus, tested in 7 past MPSC questions across 6 exam years between 2014 and 2023. Below are those real questions with their correct answers and explanations, plus the concepts worth being comfortable with first.

Real questions
7
Years tested
6 · 2014–2023
In context
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Asked in

202320212020201920162014

What you need to know first

Plant physiologyCellular energy currency (ATP)Basic chemistry and biology of plantsBasic ecology and greenhouse effect

What mastering this unlocks

Carbon fixationFuel conversion technologiesOxygen ProductionTropical ForestsChlorophyll structurePlant biochemistryPrimary productivityOxygen CycleForest Types

Real questions that test this

प्रकाश-संश्लेषणामध्ये प्रकाशावर आधारित प्रक्रियेचे महत्त्वाचे कार्य कोणते आहे ? What is the principal function of the light-dependent reactions of photosynthesis ?

a)NADH₂ व ATP चे रूपांतर करणे / To transfer the NADH₂ and ATP
b)NADPH व ATP चा उपयोग करणे / To utilize the NADPH and ATP
c)NADPH व ATP ची निर्मिती करणे / To generate the NADPH and ATP✓ Correct
d)वरील सर्व / All of the above

The light-dependent reactions of photosynthesis capture solar energy to generate energy-rich molecules NADPH and ATP.

शेवाळ वनस्पती ही अन्नासाठी परावलंबी असतात आणि त्यामध्ये अनेक प्रकारची रंगद्रव्ये आढळतात. Algae is dependant upon other living organisms for their food and they have various pigments in them.

(a)वरील विधान पूर्णपणे बरोबर आहे. / The above statement is completely correct.

(b)वरील विधानातील पूर्वार्ध बरोबर आहे. / The former half of the above statement is correct.

(c)वरील विधान पूर्णपणे चूक आहे. / The above statement is completely wrong.

(d)वरील विधानातील पूर्वार्ध चूक आहे. / The former half of the above statement is wrong.

1)फक्त (a) / Only (a)
2)(a) आणि (b) / (a) and (b)
3)फक्त (d) / Only (d)✓ Correct
4)(b) आणि (c) / (b) and (c)

Algae are autotrophic organisms containing chlorophyll that perform photosynthesis to manufacture their own food, making the former half of the statement incorrect.

रसायनांपासून स्वतःचे अन्न तयार करणारे जीवाणू (स्वयंजीवी) कोणत्या रसायनांचे विघटन करून ऊर्जा मिळवतात ? Chemosynthetic bacteria obtain energy by oxidizing ___________ chemical compounds.

1)सेंद्रिय द्रव्ये / Organic
2)असेंद्रिय द्रव्ये / Inorganic✓ Correct
3)कृत्रिम द्रव्ये / Synthetic
4)प्रक्रिया केलेली द्रव्ये / Processed

Chemosynthetic autotrophic bacteria obtain energy by oxidizing inorganic chemical compounds like hydrogen sulfide, ammonia, or iron compounds in the absence of sunlight.

खालीलपैकी कोणती प्रक्रिया श्वसन प्रक्रियेत अंतर्भूत नाही ? Which among the following is not involved in Respiratory Process ?

1)(1) केल्व्हिन सायकल / Calvin cycle✓ Correct
2)(2) सायट्रीक ॲसिड सायकल / Citric acid cycle
3)(3) ग्लायकोलीसिस / Glycolysis
4)(4) इलेक्ट्रॉन ट्रान्सपोर्ट चेन / Electron transport chain

The Calvin cycle is part of photosynthesis (dark reaction), not respiration. Respiration involves glycolysis, Kreb's (citric acid) cycle, and electron transport chain.

निसर्गात, ____________ हे सौर/प्रकाश रासायनिक अभिक्रियेचे उदाहरण आहे. In nature, ____________ is an example of photochemical reaction.

1)समुद्राच्या पाण्यातील सोडिअम क्लोराइडचे तयार होणे / formation of sodium chloride in sea-water
2)हायड्रोजन व ऑक्सिजनचे पाण्यात रूपांतर होणे / conversion of hydrogen and oxygen into water
3)वातावरणातील ऑक्सिजनचे ओझोन मध्ये रूपांतर होणे / conversion of atmospheric oxygen into ozone✓ Correct
4)आम्ल पाऊस पडणे / formation of acid rain

Photosynthesis in plants is the most prominent natural example of a photochemical reaction where solar energy is converted into chemical energy.