Biology

Photosynthesis in Plants

1,508 Questions

Photosynthesis is the biological process by which plants convert light energy into chemical energy. This page contains practice questions covering essential topics like chlorophyll, light reactions, and the pathways specific to plants. This material is crucial for medical entrance exams and academic assessments.

Chlorophyll and pigmentsLight reactionsCalvin cycleCAM plantsElectron transportPhotosynthesis factors

Photosynthesis in Plants Questions

Multiple choice

Which of the following is the incorrect statement?

  1. Carboxyunimutase is also called as RUBISCO.

  2. Mn<sup style="font-family:">2+ and Na<sup style="font-family:">+ ions containing magnoprotein is associated with photolysis of water.

  3. Precursor for the biosynthesis of ABA is violaxanthin.

  4. Starch is visible product of photosynthesis.

  5. First phase of calvin cycle is called glycolytic reversal phase.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Magnoprotein is associated with photolysis of water, which contains Mn++ and Cl- as cofactor.

Multiple choice

Who demonstrated that photosynthesis is essentially a light-dependent reaction in which hydrogen from a suitable oxidisable compound reduces carbon dioxide?

  1. Cornelius van Niel

  2. T.W Engelmann

  3. Julius von Sachs

  4. Jan Ingenhousz

  5. Joseph Priestley
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cornelius van Niel, based on his studies of purple and green bacteria, demonstrated that photosynthesis is essentially a light-dependent reaction in which hydrogen from a suitable oxidisable compound reduces carbon dioxide.

Multiple choice

Which of the following statements is correct about pigments?

  1. Chlorophyll-b, Xanthophylls and Carotenoids are accessory pigments.

  2. Only Xanthophylls and Carotenoids are accessory pigments.

  3. Accessory pigments protect Chlorophyll-a from Photo-oxidation.

  4. Both 1 and 3

  5. Both 2 and 3
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Chlorophyll-b, Xanthophylls and Carotenoids are called as accessory pigments. They protect Chlorophyll-a from photo-oxidation.

Multiple choice

Anoxygenic photosynthesis is performed by which of the following bacteria?

  1. Green sulphur bacteria

  2. Purple bacteria

  3. Acidobacteria

  4. Heliobacteria

  5. All of the above
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Anoxygenic photosynthesis is the phototrophic process where light energy is captured and converted to ATP, without the production of oxygen. Water is therefore not used as an electron donor. Green sulfur bacteria, green and red filamentous anoxygenic phototrophs (FAPs), phototrophic purple bacteria, phototrophic Acidobacteria, and phototrophic heliobacteria perform Anoxygenic photosynthesis.

Multiple choice

Which of the following statements is incorrect?

  1. Ferredoxin is an electron carrier in ETC

  2. Plastocyanin is an insoluble protein

  3. Chlorophyll a0 is an early electron acceptor

  4. QK-A is an early electron acceptor

  5. MGDG II is a lipid
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plastocyanin is a soluble protein.

Multiple choice

Which of the following statements is correct about C4 plants?

  1. Mesophyll cells are rich in RuBisCO enzyme.

  2. Bundle sheath cells lack RuBisCO enzyme.

  3. Aspartic acid formed in bundle sheath cells is transported to mesophyll cells.

  4. CO2 is released in bundle sheath cells.

  5. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In the bundle sheath cells these C4 acids are broken down  to release CO2 and a 3-carbon molecule.