MCQOPTIONS
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MCQOPTIONS
This section includes 269 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Photosynthesis is faster in |
| A. | Blue light |
| B. | Sun light |
| C. | Red light |
| D. | Green light |
| Answer» D. Green light | |
| 2. |
The process in which water is split during photosynthesis is |
| A. | Photolysis |
| B. | Hydrolysis |
| C. | Plasmolysis |
| D. | Hemolysis |
| Answer» B. Hydrolysis | |
| 3. |
Carbon dioxide is released by plant during |
| A. | Photosynthesis |
| B. | Asent of sap |
| C. | Transpiration |
| D. | Respiration |
| Answer» E. | |
| 4. |
Transpiration help in |
| A. | Transpiration of minerals |
| B. | Ascent of sap |
| C. | Cooling |
| D. | All of these |
| Answer» E. | |
| 5. |
Which of the following gas is absorbed during photosynthesis is |
| A. | N |
| B. | CO |
| C. | O |
| D. | Water vapour |
| Answer» C. O | |
| 6. |
Photosynthetic organelles found in plant cells are |
| A. | Mitochondria |
| B. | Golgi bodies |
| C. | Chloroplast |
| D. | Lysosomes |
| Answer» D. Lysosomes | |
| 7. |
Beside water and light which is more essential as a raw material for photosynthesis |
| A. | CO |
| B. | O |
| C. | Mineral salt |
| D. | NAD |
| Answer» B. O | |
| 8. |
The force by which water move upwards into tracheary elements of xylem in the root region is |
| A. | Transpiration pull |
| B. | Root pressure |
| C. | Turgor pressure |
| D. | Imbibition pressure |
| Answer» C. Turgor pressure | |
| 9. |
Oxygen released during Photosynthesis of green plant comes from the breakdown of which of the following? |
| A. | Carbon dioxide |
| B. | Fatty acid |
| C. | Carbohydrate |
| D. | Water |
| Answer» E. | |
| 10. |
Hydrothodes occur on |
| A. | Stem |
| B. | Leaves |
| C. | Root |
| D. | All of these |
| Answer» C. Root | |
| 11. |
Name a biological process in which glucose and fat is oxidised to librate energy |
| A. | Photosynthesis |
| B. | Respiration |
| C. | Transpiration |
| D. | Fermentation |
| Answer» C. Transpiration | |
| 12. |
The process in which loss of water occurs in the form of water vapour through aerial part of plant is |
| A. | Respiration |
| B. | Guttation |
| C. | Transpiration |
| D. | Exosmosis |
| Answer» D. Exosmosis | |
| 13. |
Compensation point is the value of a factor where there is |
| A. | Begining of photosynthesis |
| B. | Little photosynthesis |
| C. | Photosynthesis equal to rate of respiration |
| D. | Neither photosynthesis nor respiration |
| Answer» D. Neither photosynthesis nor respiration | |
| 14. |
A cell shrink when it is placed in |
| A. | Hypertonic solution |
| B. | Hypotonic solution |
| C. | Isotonic solution |
| D. | Saturated solution |
| Answer» B. Hypotonic solution | |
| 15. |
ATP is |
| A. | An enzyme which during about oxidation |
| B. | Harmone |
| C. | A protein |
| D. | A molecule which contain high energy phosphate bond |
| Answer» E. | |
| 16. |
Phototrophic and Geotropic movements are linked to |
| A. | Gibberellins |
| B. | Enzymes |
| C. | Auxin |
| D. | Cytokinis |
| Answer» D. Cytokinis | |
| 17. |
Green pigment found in the leaf of plant is |
| A. | Haemoglobin |
| B. | Chlorophyll |
| C. | Lycopin |
| D. | None of these |
| Answer» C. Lycopin | |
| 18. |
Mitochondria are sites of |
| A. | Oxidative phosphorylation |
| B. | Photolysis |
| C. | Phosphorylation |
| D. | Starch synthesis |
| Answer» B. Photolysis | |
| 19. |
Plant cooling occurs due to |
| A. | Assimilation |
| B. | Guttation |
| C. | Photorespiration |
| D. | Transpiration |
| Answer» E. | |
| 20. |
Respiration is |
| A. | Endothermic process |
| B. | Exothermic Process |
| C. | Anabolic process |
| D. | Endagenic process |
| Answer» C. Anabolic process | |
| 21. |
Instaneous source of energy is |
| A. | Glucose |
| B. | Fats |
| C. | Proteins |
| D. | Amino acids |
| Answer» B. Fats | |
| 22. |
ATP means |
| A. | Adesino tri phosphate |
| B. | Adenine tri phosphate |
| C. | Adenosine tri phosphate |
| D. | Adenosine tetraphosphate |
| Answer» D. Adenosine tetraphosphate | |
| 23. |
Role of chlorophyll in photosynthesis is |
| A. | Absorption of water |
| B. | Absorption of light energy |
| C. | Absorption of CO |
| D. | None of these |
| Answer» C. Absorption of CO | |
| 24. |
Apoplastic movement of water occurs through |
| A. | Wall of the cells |
| B. | Intercelhlar spaces |
| C. | Both (a) and (b) |
| D. | Plasmodesmate |
| Answer» D. Plasmodesmate | |
| 25. |
Instrument meant for measuring the rate of respiration |
| A. | Potometer |
| B. | Oxygenometer |
| C. | Autometer |
| D. | Respirometer |
| Answer» E. | |
| 26. |
Alcohol is a product of |
| A. | Anaerobic respiration |
| B. | Aerobic respiration |
| C. | Photosynthesis |
| D. | Glycolysis |
| Answer» B. Aerobic respiration | |
| 27. |
It is possible to produce seedless tomato fruits by |
| A. | Applying trace elements in tomato fruits |
| B. | Spraying mineral solution on plants |
| C. | Spraying hormones on flowers |
| D. | Applying fertilizers containing radioactive element |
| Answer» D. Applying fertilizers containing radioactive element | |
| 28. |
When concentration of solutes is low in the soil, absorprtion of water |
| A. | Stoppes |
| B. | Increases |
| C. | Retards |
| D. | Remains Normal |
| Answer» C. Retards | |
| 29. |
The Percentage of water lost during transpiration is |
| A. | 80% |
| B. | 60% |
| C. | 99% |
| D. | 40% |
| Answer» D. 40% | |
| 30. |
Which is the type of movement that occurs during Opening and closing of flower? |
| A. | Nastic movement |
| B. | Tactic movement |
| C. | Tropic movement |
| D. | Mutation |
| Answer» B. Tactic movement | |
| 31. |
Water exadation through hydothodes is |
| A. | Guttation |
| B. | Transpiration |
| C. | Hydrolysis |
| D. | Excretion |
| E. | .. |
| Answer» B. Transpiration | |
| 32. |
The loss of water in the form of water drops is called |
| A. | Transpiration |
| B. | Respiration |
| C. | Guttation |
| D. | Exosmosis |
| Answer» D. Exosmosis | |
| 33. |
Flower in which Pollination takes place by insect their pollen grains are |
| A. | Smooth and dry |
| B. | Rough and sticky |
| C. | Rough and dry |
| D. | Large in size |
| Answer» C. Rough and dry | |
| 34. |
Which one of the following plants produces seed but not fruit? |
| A. | Almond |
| B. | Cycus |
| C. | Ground nut |
| D. | Mustrad |
| Answer» C. Ground nut | |
| 35. |
Minute pore found on the soft aerial part of plant especially the leaves are called? |
| A. | Cuticles |
| B. | Stomata |
| C. | Lenticle |
| D. | None of these |
| Answer» C. Lenticle | |
| 36. |
Plant purifies air during |
| A. | Photosynthesis |
| B. | Respiration |
| C. | Transpiration |
| D. | Desiceation |
| Answer» B. Respiration | |
| 37. |
The net gain of energy from one gram mole of glucose during aerobic respiration is |
| A. | 2 ATP |
| B. | 4 ATP |
| C. | 38 ATP |
| D. | 40 ATP |
| Answer» D. 40 ATP | |
| 38. |
Which of the following is required for synthesis of carbohydrate? |
| A. | Chlorophyll |
| B. | Water |
| C. | Notrogen |
| D. | Carbon dioxide |
| Answer» E. | |
| 39. |
Percentage of light energy utilised for photosynthesis by higher plant is |
| A. | 100% |
| B. | 50% |
| C. | 10% |
| D. | 1% to 2% |
| Answer» E. | |
| 40. |
A Biological process in which sugar is oxidised to release energy |
| A. | Transpiration |
| B. | Respiration |
| C. | Photosynthesis |
| D. | Fermentation |
| Answer» C. Photosynthesis | |
| 41. |
First compund which is fixed during photosynthesis is |
| A. | Phosphoglyceric acid |
| B. | Starch |
| C. | Glucose |
| D. | Diphosphoglyceric acid |
| Answer» D. Diphosphoglyceric acid | |
| 42. |
Transpiration is regulated by movement of |
| A. | Guard cells |
| B. | Subsidiary cell |
| C. | Epidermal cell |
| D. | Mesophyll cells |
| Answer» B. Subsidiary cell | |
| 43. |
Example of positive geotropism is |
| A. | Closing of flower |
| B. | Upward growth of stem |
| C. | Downward growth of root |
| D. | Lateral growth of root |
| Answer» D. Lateral growth of root | |
| 44. |
When chlorophyll absorbs light, it gets excited and emits |
| A. | Oxygen |
| B. | Water |
| C. | Electrons |
| D. | Energy rich compound |
| Answer» D. Energy rich compound | |
| 45. |
After respiration the conversion of energy is mainly in the form of |
| A. | ADP |
| B. | ATP |
| C. | AMP |
| D. | Glucose |
| Answer» C. AMP | |
| 46. |
Closure of lid in pitcher plant is a |
| A. | Tropic movement |
| B. | Turgor movement |
| C. | Paratonic movement |
| D. | Autonomic movement |
| Answer» D. Autonomic movement | |
| 47. |
Rate of photosynthesis is minimum is |
| A. | Red light |
| B. | Yellow light |
| C. | Blue light |
| D. | Green light |
| Answer» E. | |
| 48. |
Photosynthesis proceeds in sequence of |
| A. | Dark phase and light phase |
| B. | Light phase alone |
| C. | Light phase and dark phase |
| D. | Dark phase alone |
| Answer» D. Dark phase alone | |
| 49. |
Chemicals having
|
| A. | Enzyems |
| B. | Phyto hormones |
| C. | Catalytic agents |
| D. | Manure |
| Answer» C. Catalytic agents | |
| 50. |
Krebs cycle forms an important product |
| A. | Acetyl CoA |
| B. | ADP |
| C. | ATP |
| D. | Water |
| Answer» D. Water | |