Photosynthesis in Higher Plants Biology Quiz for NEET

No. of Questions in Quiz	28 with Explanation
Time for each Questions	60 Seconds
Attempts Allowed	Unlimited
Available	Always
Pass Percentage	70 %

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#1. In Hatch and Slack pathway, the primary CO_{2 acceptor is}

Rubisco

Oxaloacetic acid

Phosphoglyceric acid

Phosphoenol pyruvate

PEP (Phosphoenol pyruvate) is the primary CO₂ acceptor in C4 or Hatch and Slack pathway.

#2. One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of :

Blue and red light

Violet and green light

Indigo and green light

Orange and yellow light

#3. In order to increase the yield of sugarcane crop, which of the following plant growth regulators should be sprayed?

Cytokinins

Ethylene

Auxins

Gibberellins

Gibberellins shows bolting when gibberellin is sprayed on sugarcane crop, the length of the stem increases.

#4. Which of the following is not a product of light reaction of photosynthesis?

ATP

NADH

Oxygen

NADPH

ATP, NADPH and oxygen are products of light reaction, while NADH is a product of respiration process.

#5. Phosphonol pyruvate (PEP) is the primary CO₂ acceptor in

C3 plants

C2 plants

C4 plants

C3 and C4 plants

PEP is 3C compound which serves as primary CO₂ acceptor in the mesophyll cells of C4 plants like maize, sugarcane, Sorghum etc.

#6. With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

Light saturation for CO₂ fixation occurs at 10% of full sunlight

Increasing atmospheric CO₂ concentration upto 0.05% can enhance CO₂ fixation rate

C3 plants responds to higher temperatures with enhanced photosynthesis while C4 plants have much lower temperature optimum

Tomato is a greenhouse crop which can be grown in CO₂ - enriched atmosphere for higher yield

In C3 plants photosynthesis is decreased at higher temperature due to increased photorespiration.

C4 plants have higher temperature optimum because of the presence of pyruvate phosphate dikinase enzyme, which is sensitive to low temperature.

#7. The process which makes major difference between C3 and C4 plants is

Glycolysis

Calvin cycle

Photorespiration

Respiration

Photorespiration is present in C3 plants but absent in C4 plants.

#8. A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?

Nitrogen fixer

CAM

C4 plants are special, they tolerate higher temperatures, they lack photorespiration and have greater productivity.

#9. Emerson's enhancement effect and Red drop have been instrumental in the discovery of

Oxidative phosphorylation

Photophosphorylation and non-cyclic electron transport

Two photosystems operating simultaneously

Photophosphorylation and cyclic electron transport

#10. In a chloroplast the highest number of protons are found in

Antennae complex

Stroma

Lumen of thylakoids

Inter membrane space

Proton concentration is higher in the lumen of thylakoid due to photolysis of water, H pumping and NADP reductase activity in stroma.

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

Magnesium and Chlorine

Manganese and Chlorine

Manganese and Potassium

Magnesium and Molybdenum

#12. The correct sequence of cell organelles during photorespiration is

Chloroplast, – mitochondria, – peroxisome

Chloroplast, – vacuole, – peroxisome

Chloroplast, – Golgibodies, – mitochondria

Chloroplast, – Rough endoplasmic reticulum, – Dictyosomes

Photorespiration get completed in three cell organells i.e., chloroplast, peroxysome and mitochondria.

#13. In Kranz anatomy, the bundle sheath cells have

Thin walls, intercellular spaces and several chloroplasts

Thick walls, many intercellular spaces and few chloroplasts

Thin walls, many intercellular spaces and no chloroplasts

Thick walls, no intercellular spaces and large number of chloroplasts

#14. CAM helps the plants in

Reproduction

Conserving water

Secondary growth

Disease resistance

CAM plants are extreme xerophytes.

#15. PGA as the first CO₂ fixation product was discovered in photosynthesis of

Alga

Bryophyte

Gymnosperm

Angiosperm

#16. Kranz anatomy is one of the characteristics of the leaves of

Potato

Wheat

Sugarcane

Mustard

C4 plants have bundle sheath cells and Kranz anatomy.

#17. Oxygenic photosynthesis occurs in:

Oscillatoria

Rhodospirillum

Chlorobium

Chromatium

Oscillatoria (BGA) – Example of oxygenic photosynthesis, others are anoxygenic.

#18. Cyclic photophosphorylation results in the formation of

ATP and NADPH

ATP, NADPH and O2

ATP

NADPH

#19. Stroma in the chloroplasts of higher plant contains:

Light-dependent reaction enzymes

Ribosomes

Chlorophyll

Light-independent reaction enzymes

#20. The C4 plants are photosynthetically more efficient than C3 plants because

They have more chloroplasts

The CO₂ compensation point is more

CO₂ generated during photorespiration is trapped and recycled through PEP carboxylase

The CO₂ efflux is not prevented

CH4 plants have large number of chloroplast and lack photorespiration.

#21. The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is:

Quinone

Cytochrome

Iron-sulphur protein

Ferredoxin

#22. In photosystem-I, the first electron acceptor is

Ferredoxin

Cytochrome

Plastocyanin

An iron-sulphur protein

#23. During photorespiration, the oxygen consuming reaction(s) occur in

Stroma of chloroplasts and mitochondria

Stroma of chloroplasts and peroxisomes

Grana of chloroplasts and peroxisomes

Stroma of chloroplasts

#24. Photosynthetic Active Radiation (PAR) has the following range of wavelengths :

400 - 700 nm

340 - 450 nm

450 - 950 nm

500 - 600 nm

#25. Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higherplants?

Blue and green

Green and red

Red and violet

Violet and blue

Carotenoids absorbed middle part of visible spectrum mainly violet and blue light.

#26. During light reaction of photosynthesis, which of the following phenomenon is observed during cyclic phosphorylation as well as non-cyclic phosphorylation?

Release of O2

Formation of ATP

Formation of NADPH

Involvement of PS I & PS II pigment systems

ATP is synthesized in both cyclic and non-cyclic photophosphorylation.

#27. NADPH₂ is generated through

Photosystem II

Anaerobic respiration

Glycolysis

Photosystem I

#28. The first step for initiation of photosynthesis will be

Photolysis of water

Excitement of chlorophyll molecules due to absorption of light

ATP formation

Glucose formation

During light reaction first of all excitation of chlorophyll molecules occurs due to absorption of light.

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