Light Reaction

Q.

How does photosynthesis takes place in desert plants??

Q. The solubility product of Hg2I2 is equal to?

Q. How many electrons, protons and photons are involved in the lysis of water to evolve one molecule of oxygen?

1. $4e^{–},4H^{+}$ and 4 photons
2. $4e^{–},4H^{+}$ and 8 photons
3. $2e^{–},2H^{+}$ and 8 photons
4. $2e^{–},2H^{+}$ and 4 photons

Q.

Which is the first step in Translation?

Q.

The oxygen that evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements is involved in this reaction?

1. Manganese and Potassium

2. Manganese and Chlorine

3. Magnesium and Molybdenum

4. Magnesium and Chlorine

Q. The first step in photosynthesis is the

1. Excitement of an electron of chlorophyll by a photon of light
   
2. Ionization of water
3. Joining of 3-carbon atom to form glucose
4. Formation of ATP

Q.

What is the wavelength of Vibgyor?

Q.

Question 24
Where is NADP reductase enzyme located in the chloroplast? What is the role of this enzyme in proton gradient development?

Q.

What is obtained from the combination of apoenzyme and coenzyme?

Q.

Molecular formula of chlorophyll a and chlorophyll b

Q.

Question 54
What are the important events and end products of the light reaction?

Q.

Look at leaves of the same plant on the shady side and compare it with the leaves on the sunny side. Or, compare the potted plants kept in the sunlight with those in the shade. Which of them has leaves that are darker green? Why?

Q.

How does photosynthesis occur in plants with red or brown leaves?

Q.

How does Changing Concentration affect EMF?

Q. Name a few more elements that fall in the category of essential elements that activate or inhibit enzymes.

Q.

Question 22
Does moonlight support photosynthesis? Find out.

Q.

During high light intensity, the chloroplasts align themselves

OPTIONS

A. in vertical position along lateral walls

B. along tangential walls

C. in centre and get scattered

D. perpendicular to light

[Dear mentor please give the detailed solution]

Q.

What is chlorosis in plants?

Q. Light dependent reaction of photosynthesis occurs in the

1. stroma
2. thylakoid membrane
3. inner membrane of chloroplasts
4. intermembrane space of chloroplast
   

Q.

Identify the element whose compounds show phosphorescence.

Q. Which statement concerning ATP synthesis is true?

1. ATP can be synthesized through substrate level phosphorylation, photophosphorylation and oxidative phosphorylation
2. The proton-motive force is the establishment of proton gradients and electrochemical potentials across the inner membrane
3. Proton-motive force is essential for back flow of $H^{+}$ from outer chamber of matrix of mitochondria through proton channel $\left(F_0\right)\text{of}{F}_0–F_1$ particle to produce ATP
4. All of the above

Q.

Question 11
The correct sequence of flow of electrons in the light reaction is
(a) PS II, plastoquinone, cytochromes, PS I ferredoxin
(b) PS I, plastoquinone, cytochromes, PS II, ferredoxin
(c) PS I, ferredoxin, PS II
(d) PS I, plastoquinone, cytochromes, PS II, ferredoxin

Q.

Why is P700 called so?

Q. A coenzyme is:

1. Same enzyme that occurs in different tissues such as heart and muscle
2. One that shares the function other enzyme
3. Organic or inorganic in nature and helps activate metabolic enzymes
4. Organic non–protein in nature and helps to activate metabolic enzymes

Q. All are second messengers except

1. cAMP
2. IP3
3. DAG
4. guanylyl cyclase

Q. Polar solvent favours keto form while non polar solvents favours enol form. Which has the maximum enolic form in CCI4 (1) CH3COCH2COCH3 (2)CH3COCH2COH (3)CH3COCH2COOC2H5 (4)CH3COCH2CH3

Q. Plastoquinone (PQ) carries electrons from

1. Fe-S→ FNR
2. Cyt $b_{6}f$→ P700
3. P680→ pheophytin
4. Pheophytin→ cyt $b_{6}f$

Q.

Is anthocyanin present in beetroot?

Q. Which of the following best describes light reaction?

1. $H_2+\text{Light energy}\to 2H+\text{ATP}+\text{NADPH}$
2. $C{O}_2+\text{Light energy}\to O_2+\text{ATP}+\text{NADPH}$
3. $H_{2}0+\text{Light energy}\to \text{ATP}+\text{NADPH}+O_2$
4. $O_2+\text{Light energy}\to C{O}_2+\text{ADP}+\text{NADPH}$

Q. What is difference between synthesis of chlorophyll and formation of chlorophyll?