Consider the following statements regarding photosynthesis and respiration in plants and select the correct option
I) RuBisCO has high affinity to oxygen in low $CO_2$ concentration
II)The Calvin pathway occurs in the chloroplast of bundle sheath cells of $C_4$ plants
III) Yeast poison themselves when the concentration of alcohol reaches $7\%$
IV) Oxygen is a final hydrogen acceptor during aerobic respiration
Consider the following statements regarding photosynthesis and respiration in plants and select the correct option
I) RuBisCO has high affinity to oxygen in low $CO_2$ concentration
II)The Calvin pathway occurs in the chloroplast of bundle sheath cells of $C_4$ plants
III) Yeast poison themselves when the concentration of alcohol reaches $7\%$
IV) Oxygen is a final hydrogen acceptor during aerobic respiration
- Statements I & III are correct, II is wrong
- Statements I & IV are correct, III is wrong
- Statements II & II are correct, I is wrong
- Statements I & II are correct, IV is wrong
The Correct Option is B
Approach Solution - 1
Statement I: Correct. RuBisCO exhibits oxygenase activity under low \( CO_2 \) concentrations, leading to photorespiration. This is a well-documented property of the enzyme.
Statement II: Correct. In \( C_4 \) plants, the Calvin cycle is specifically localized in the bundle sheath cells' chloroplasts, while initial carbon fixation occurs in mesophyll cells.
Statement III: Incorrect. Yeast fermentation produces ethanol, and when concentrations reach approximately 7%, it becomes toxic to the yeast cells, inhibiting their growth.
Statement IV: Correct. In aerobic respiration's electron transport chain, oxygen serves as the terminal electron acceptor, combining with electrons and protons to form water.
(B) Statements I & IV are correct, III is wrong -
Approach Solution -2
Statement I: Correct. Under low \( CO_2 \) concentrations, RuBisCO demonstrates oxygenase activity, which results in photorespiration. This is a well-established characteristic of the enzyme.
Statement II: Correct. In \( C_4 \) plants, the Calvin cycle occurs specifically in the chloroplasts of bundle sheath cells, while the initial carbon fixation takes place in mesophyll cells.
Statement III: Incorrect. Yeast fermentation produces ethanol, and concentrations around 7% become toxic to the yeast cells, inhibiting their growth.
Statement IV: Correct. In the electron transport chain of aerobic respiration, oxygen acts as the final electron acceptor, combining with electrons and protons to form water.
(B) Statements I & IV are correct, III is incorrect
Top Questions on Photosynthesis in higher plants
- Choose the correct sequence of no. of molecules formed when 6 mol of CO\textsubscript{2 enters into calvin cycle pathway}
- AP EAPCET - 2025
- Botany
- Photosynthesis in higher plants
- Choose the correct statements among the following
I. Proton gradient across the membrane decreases due to cyclic flow of electrons between PQ and cytochrome b.
II. NADP reductase enzyme is located on the stroma side of the membrane.
III. PQ removes electron from the stroma- AP EAPCET - 2025
- Botany
- Photosynthesis in higher plants
- Number of ATP and NADPH required to make one triose through Calvin cycle.
- AP EAPCET - 2025
- Botany
- Photosynthesis in higher plants
- Choose the correct statements among the following
I. Joseph Priestley (1770): Showed that plants have the ability to take CO2 from the atmosphere and release O2.
II. Jan Ingenhousz (1779): Release of CO2 by plants was possible only at night and only by the non-green parts of plants.
III. Julius Von Sachs (1884): Green parts in plants produce glucose which is stored as starch.
IV. C. Van Niel (1931): Photosynthesis is essentially a light dependent reaction in which hydrogen from an oxidizable compound reduces CO2 to form carbohydrates.
Correct statements: I, III, IV- AP EAPCET - 2025
- Botany
- Photosynthesis in higher plants
- Choose the incorrect statement among the following
- AP EAPCET - 2025
- Botany
- Photosynthesis in higher plants
Questions Asked in KCET exam
- A solenoid is 1 m long and 4 cm in diameter. It has five layers of windings of 1000 turns each and carries a current of 7 A. The magnetic field at the centre of the solenoid is
- KCET - 2025
- Magnetic Field
- The derivative of \( \sin x \) with respect to \( \log x \) is:
- KCET - 2025
- Derivatives
- If the number of terms in the binomial expansion of \((2x + 3)^n\) is 22, then the value of \(n\) is:
- KCET - 2025
- Binomial theorem
- A horizontal pipe carries water in a streamlined flow. At a point along the pipe, where the cross-sectional area is \( 10 \, \text{cm}^2 \), the velocity of water is 1 m/s and the pressure is 2000 Pa. What is the pressure of water at another point where the cross-sectional area is \( 5 \, \text{cm}^2 \)? [Density of water = 1000 kg/m³]
- KCET - 2025
- Heat Transfer
- A series LCR circuit containing an AC source of 100V has an inductor and a capacitor of reactances 24\(\Omega\) and 16\(\Omega\) respectively. If a resistance of 6\(\Omega\) is connected in series, then the potential difference across the series combination of inductor and capacitor will be
- KCET - 2025
- Electromagnetic waves
Concepts Used:
Photosynthesis in Higher Plants
Processes Of Photosynthesis in Higher Plants:
Photosynthesis in higher plants involves the following processes:
- Light Reaction
- Dark Reaction
Light Reaction:
- This phenomenon occurs in the presence of light.
- The pigment absorbs light and produces energy in the form of ATP.
- The process involves- absorption of light, water splitting, the release of oxygen, and formation of ATP and NADPH.
Dark Reaction:
This process occurs in the absence of light in the stroma of the chloroplasts. The following cycles are involved in the process:
- Calvin Cycle (C3 Cycle)
- C4 Cycle (Hatch and Slack Pathway)