Chapter 13

Which type of phosphorylation takes place in photosynthesis? (a) Cyclic (b) Non-cyclic (c) Both (a) and (b) (d) None of these

Unidirectional flow of electrons in photophosphorylation takes place in (a) Cyclic (b) Non-cyclic (c) Pseudocyclic (d) All of these

In light reaction of photosynthesis, the chlorophyll is subjected to (a) Destruction (b) Permanent reduction (c) Oxidation and reduction (d) Neutralization

Photosynthetic pigments in chloroplast are embedded in the membrane of (a) Thylakoids (b) Photoglobin (c) Matrix (d) Envelope of chloroplast

Which of the following wavelength occurs in red part of the spectrum? (a) \(470 \mathrm{~nm}\) (b) \(390 \mathrm{~nm}\) (c) \(680 \mathrm{~nm}\) (d) \(830 \mathrm{~nm}\)

The process for which manganese and chloride ions are required in (a) Photolysis of water (b) For transfer of \(\mathrm{H}^{+}\) ion to NADP (c) For transfer of charge of hydroxyl ion to chlorophyll (d) None of the above

What is the absorption maxima of \(\mathrm{P}-700\) ? (a) \(700 \AA\) (b) \(683 \mathrm{~nm}\) (c) \(700 \mathrm{~cm}\) (d) \(700 \mathrm{~nm}\)

\(\mathrm{NADPH}_{2}\) is generated through (a) Glycolysis (b) Photosystem I (c) Photosystem II (d) Anaerobic respiration

Quantasomes are present in (a) Pigment system I (b) Pigment system II (c) Both (a) and (b) (d) None of these

Which of the chlorophyll type ejects the electron during photophosphorylation? (a) Chlorophyll 'b' (b) Chlorophyll 'a' (c) Chlorophyll 'a' and 'b' (d) Xanthophyll

In cyclic photophosphorylation which one of the following is formed? (a) ATP (b) NADP and ATP (c) \(\mathrm{NADH}\), and \(\mathrm{O}_{2}\) (d) NADPH, ATP and \(\mathrm{O}\).

Where does the primary photochemical reaction occur in chloroplast/Where does the light reaction of photosynthesis takes place? (a) Stroma (b) Edoplasmic reticulum (c) Quantasome or thylakoids (Grana) (d) Inner membrane of chloroplast

The trapping centre of light energy in photosystem \(I\) is (a) P-660 (b) \(\mathrm{P}-680\) (c) P-700 (d) P-720

Pigment system I conducts (a) Cyclic photophosphorylation (b) Non-cyclic photophosphorylation (c) Both (a) and (b) (d) None of these

Pigment system II is concerned with (a) Photolysis of water (b) Reduction of \(\mathrm{CO}_{2}\) (c) Flowering (d) None of these

Photophosphorylation is a process in which (a) Light energy is converted into chemical energy in the form of ATP. (b) NADP is formed (c) Chemical energy is used to produce ATP (d) \(\mathrm{CO}_{2}\) is reduced to carbohydrate

The reaction centre for PS I and PS II are (a) \(\mathrm{P}_{700}\) and \(\mathrm{P}_{680}\) respectively (b) \(\mathrm{P}_{6 \mathrm{so}}\) and \(\mathrm{P}_{\mathrm{ron}}\) respectively (c) \(\mathrm{P}_{580}\) and \(\mathrm{P}_{700}\) respectively (d) \(\mathrm{P}_{700}\) and \(\mathrm{P}_{s \infty 0}\) respectively

Results of light reaction is/are (a) Only ATP (b) Only NADPH \(_{2}\) (c) ATP and \(\mathrm{NADPH}_{2}\) (d) Only FAD

Biosynthetic phase of life uses all except _________ that is produced in photochemical phase. (a) ATP (b) NADPH (c) \(\mathrm{O}_{2}\) (d) None of these

Which of the following is correct about biosynthetic phase? (a) \(\mathrm{C}_{14}\) isotope is used to find out this pathway (b) Calvin worked on this pathway (c) Melvin Calvin used photosynthetic algae for this pathway (d) All the above

The similarity between \(\mathrm{C}_{3}\) and \(\mathrm{C}_{4}\) pathway is: (a) Both are equally efficient. (b) Organic acid is formed as the first product of \(\mathrm{CO}_{2}\) fixation. (c) Both requires one type of cell to occur. (d) Both takes place in all the plants.

Which pathway takes place in all photosynthetic plant? (a) \(\mathrm{C}_{3}\) (b) \(\mathrm{C}_{4}\) (c) Both (a) and (b) (d) None of these

For easy understanding, the Calvin cycle is divided into how many stages? (a) 1 (b) 2 (c) 3 (d) 4

Calvin cycle includes (a) Carboxylation (b) Reduction (c) Regeneration of \(\mathrm{RuBP}\) (d) All of these

Which process of Calvin cycle requires RuBP? (a) Carboxylation (b) Reduction (c) Regeneration (d) None of these

Reduction process of Calvin cycle requires how many ATP and NADPH for the reduction of one molecule of \(\mathrm{CO}_{2} ?\) (a) 2 mole ATP and 3 mole NADPH (b) 2 mole ATP and 2 mole NADPH (c) 1 mole ATP and 2 mole NADPH (d) 3 mole ATP and 2 mole NADPH

How many moles of ATP is required to regenerate one mole of RuBP? (a) 1 (b) 2 (c) 3 (d) 4

The first stable product of Calvin cycle has (a) 2 carbon atoms (b) 3 carbon atoms (c) 4 carbon atoms (d) 6 carbon atoms

In dark reaction, the first reaction is (a) Carboxylation (b) Decarboxylation (c) Dehydrogenation (d) Deamidation

In \(\mathrm{C}_{4}\) plants, \(\mathrm{CO}_{2}\) combines with PEP in the presence of (a) PEP carboxylase (b) RuBP carboxylase (c) RuBP oxygenase (d) Hydrogenase

Dark reaction of photosynthesis is called so because it (a) Can also occur in dark (b) Does not require light energy (c) Cannot occur during day time (d) Occurs more rapidly at night

The initial enzyme of Calvin cycle is (a) Ribulose 1,5 diphosphate carboxylase (b) Triose phosphate dehydrogenase (c) Phosphofructokinase (d) Cytochrome oxidase

During photosynthesis, when PGA is changed into phosphoglyceraldehyde, which of the following reaction occurs? (a) Oxidation (b) Reduction (c) Electrolysis (d) Hydrolysis

Ribulose diphosphate carboxylase enzyme catalyses the carboxylation reaction between (a) Oxaloacetic acid and acetyl \(\mathrm{CoA}\) (b) \(\mathrm{CO}_{2}\) and ribulose 1,5 diphosphate (c) Ribulose diphosphate and phosphoglyceraldehyde (d) PGA and dihydroxyacetone phosphate

Calvin cycle occurs in (a) Chloroplasts (b) Cytoplasm (c) Mitochondria (d) Glyoxysomes

In \(\mathrm{C}_{3}\) plants, the first stable product of photosynthesis during dark reaction is (a) 3-phosphoglyceric acid (b) Phosphoglyceraldehyde (c) Maleic acid (d) Oxaloacetic acid

How many Calvin cycle forms one hexose molecule? (a) 2 (b) 6 (c) 4 (d) 8

In which plant Calvin experimented the radioactive isotopy to discover the stable product of \(\mathrm{C}_{3}\) cycle? (a) Chlorella (b) Cycas (c) Carrot (d) Tobacco

Mesophyll chloroplast of which plant alone is capable of synthesizing starch or sucrose? (a) \(\mathrm{C}_{3}\) plant (b) \(\mathrm{C}_{4}\) plant (c) Both (a) and (b) (d) Neither \(\mathrm{C}_{3}\) nor \(\mathrm{C}_{4}\)

The enzymes of dark reaction in \(\mathrm{C}_{4}\) plants are found in (a) Bundle sheath chloroplast (b) Mesophyll chloroplast (c) Both (a) and (b) (d) None of these

In \(\mathrm{C}_{4}\) plants, the mesophyll cells are connected with bundle sheath cells with the help of (a) Cytoplasmic connection (b) Special connecting tissues (c) Plasmodesmata (d) Connection is not essential

In case of \(\mathrm{C}_{4}\) pathway, \(\mathrm{CO}_{2}\) combines with (a) PGA (b) PEP (c) RuDP (d) RMP

Which one is a \(\mathrm{C}_{4}\) plant? (a) Papaya (b) Pea (c) Potato (d) Maize

\(\mathrm{C}_{4}\) plants are also known as (a) Hatch and Slack type (b) Calvin type (c) Calvin and Bassham type (d) Emerson type

In \(\mathrm{C}_{4}\) plants, Calvin cycle occurs in (a) Stroma of bundle sheath chloroplast (b) Mesophyll chloroplast (c) Grana of bundle sheath chloroplast. (d) Does not occur as \(\mathrm{CO}_{2}\) is fixed mainly by PEP and no \(\mathrm{CO}_{2}\) is left for the Calvin cycle.

Tropical plant like sugarcane show high efficiency of \(\mathrm{CO}_{2}\) fixation because of (a) Calvin cycle (b) Hatch and Slack cycle (c) EMP pathway (d) TCA cycle

Which of the following cycle shows oxaloacetic acid as the first stable product? (a) Calvin cycle (b) Hatch and Slack cycle (c) \(\mathrm{C}_{2}\) cycle (d) None of these

Kranz type of anatomy is found in (a) \(\mathrm{C}_{2}\) plants (b) \(\mathrm{C}_{3}\) plants (c) \(\mathrm{C}_{4}\) plants (d) CAM plants

\(\mathrm{C}_{4}\) plants are adapted to (a) Hot and dry climate (b) Temperate climate (c) Cold and dry climate (d) Hot and humid climate

Which one of the following is wrong in relation to photorespiration? (a) It is a characteristic of \(\mathrm{C}_{3}\) plants (b) It occurs in chloroplasts (c) It occurs in day time only (d) It is a characteristic of \(\mathrm{C}_{4}\) plants