In Class 11 Final Exams there will be Case studies and Passage Based Questions will be asked, So practice these types of questions. Study Rate is always there to help you. Free PDF Download of CBSE Class 11 Biology Chapter 13 Case Study and Passage Based Questions with Answers were Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 11 Biology Photosynthesis in Higher Plants to know their preparation level.

In CBSE Class 11 Biology Paper, There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.

Photosynthesis in Higher Plants Case Study Questions With Answers

Here, we have provided case-based/passage-based questions for Class 11 Biology Chapter 13 Photosynthesis in Higher Plants

Case Study/Passage-Based Questions

Case Study 1:

The splitting of water is associated with the PS II; water is split into 2H+, [O] and electrons. This creates oxygen, one of the net products of photosynthesis. The electrons needed to replace those removed from photosystem I are provided by photosystem II. Water splitting complex is associated with the PS II, which itself is physically located on the inner side of the membrane of the thylakoid.

Cyclic and Non-cyclic Photo-phosphorylation

Living organisms have the capability of extracting energy from oxidisable substances and store this in the form of bond energy. Special substances like ATP, carry this energy in their chemical bonds. The process through which ATP is synthesised by cells (in mitochondria and chloroplasts) is named phosphorylation. Photo-phosphorylation is the synthesis of ATP from ADP and inorganic phosphate in the presence of light. When the two photosystems work in a series, first PS II and then the PS I, a process called non-cyclic photo-phosphorylation occurs. The two photosystems are connected through an electron transport chain. Both ATP and NADPH + H+ are synthesised by this kind of electron flow.

When only PS I is functional, the electron is circulated within the photosystem and the phosphorylation occurs due to cyclic flow of electrons. A possible location where this could be happening is in the stroma lamellae. While the membrane or lamellae of the grana have both PS I and PS II the stroma lamellae membranes lack PS II as well as NADP reductase enzyme. The excited electron does not pass on to NADP+ but is cycled back to the PS I complex through the electron transport chain. The cyclic flow hence, results only in the synthesis of ATP, but not of NADPH + H+ . Cyclic photophosphorylation also occurs when only light of wavelengths beyond 680 nm are available for excitation.

1.) Photolysis of water or splitting of water molecule takes place in _____________

• a) Photosystem PS I
• b) Photosystem PS II
• c) Photosystem PS III
• d) Both PS I and PS II

Ans:b) Photosystem PS II

2.) Water molecule splits into_________________ in presence of light.

• a) Hydrogen, Nitrogen and Electrons
• b) Hydrogen, Oxygen and Protons
• c) Hydrogen, Oxygen and Neutrons
• d) Hydrogen, Oxygen and Electrons

Ans: d) Hydrogen, Oxygen and Electrons

3.) By which mechanism two photosystem can be connected and work in series?

Ans:The two photosystems are connected through an electron transport chain, which makes them work in series.

4.) Define phosphorylation and Photo-phosphorylation.

Ans:Phosphorylation is the process through ATP molecules are synthesised by cells.

5.) Name the cell organelles in which the process of phosphorylation is carried out.

Ans: Photo-phosphorylation is the synthesis of ATP from ADP and inorganic phosphate in the presence of light.

---

Hope the information shed above regarding Case Study and Passage Based Questions for Class 11 Biology Chapter 13 Photosynthesis in Higher Plants with Answers Pdf free download has been useful to an extent. If you have any other queries about CBSE Class 11 Biology Photosynthesis in Higher Plants Case Study and Passage Based Questions with Answers, feel free to comment below so that we can revert back to us at the earliest possible.
By Team Study Rate