MCQOPTIONS
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MCQOPTIONS
This section includes 103 Mcqs, each offering curated multiple-choice questions to sharpen your Life Sciences knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the metal ligand in chlorophylls? |
| A. | Copper (Cu) |
| B. | Iron (Fe) |
| C. | Magnesium (Mg) |
| D. | Manganese (Mn) |
| Answer» D. Manganese (Mn) | |
| 2. |
A group of about 300 chlorophyll molecule acting together to trap photons and transfer energy to the pigment molecule at the reaction center may be called as |
| A. | harvesting unit |
| B. | reaction center |
| C. | photosynthetic unit |
| D. | chloromass |
| Answer» D. chloromass | |
| 3. |
Which of the following aid plants in the acquisition of nitrogen from nitrogen gas of the atmosphere? |
| A. | Bacteria |
| B. | Algae |
| C. | Nematodes |
| D. | Moulds |
| Answer» B. Algae | |
| 4. |
Plants absorb nitrates from soil and convert them into |
| A. | urea |
| B. | ammonia |
| C. | nitrogen |
| D. | none of these |
| Answer» C. nitrogen | |
| 5. |
In the presence of carbon monoxide, nitrogen fixation |
| A. | increases |
| B. | decreases |
| C. | inhibits |
| D. | none of these |
| Answer» D. none of these | |
| 6. |
The chief source of nitrogen for green plants is |
| A. | atmospheric nitrogen |
| B. | nitrates |
| C. | ammonium salts |
| D. | low molecular weight- organic nitrogenous compound |
| Answer» C. ammonium salts | |
| 7. |
What process in cellular respiration is essentially the reverse of carbon fixation in photosynthesis? |
| A. | Glycolysis |
| B. | Citric acid cycle |
| C. | Oxidative phosphorylation |
| D. | Alcohol fermentation |
| Answer» C. Oxidative phosphorylation | |
| 8. |
What do NAD+, NADP+, and FAD+ all have in common? |
| A. | They are reduced |
| B. | They have a full complement of electrons |
| C. | They are oxidized |
| D. | They are what is used during carbon fixation in photosynthesis |
| Answer» D. They are what is used during carbon fixation in photosynthesis | |
| 9. |
NADP+ is reduced to NADPH during |
| A. | light dependent reactions |
| B. | photorespiration |
| C. | calvin cylcle |
| D. | none of these |
| Answer» B. photorespiration | |
| 10. |
Which of the following is not the stage in photosynthesis? |
| A. | absorption of light |
| B. | generation of ATP |
| C. | carbon fixation |
| D. | phosphorousfixation |
| Answer» E. | |
| 11. |
Which of the following nutrients is not used in cellular respiration? |
| A. | carbohydrates |
| B. | amino acids |
| C. | fatty acids |
| D. | fiber |
| Answer» E. | |
| 12. |
In photosynthesis, carbon dioxide is converted into sugar by which process? |
| A. | carbon fixation |
| B. | carbon reduction |
| C. | sugar fixation |
| D. | photolysis |
| Answer» B. carbon reduction | |
| 13. |
All organisms carry out photosynthesis by using carbon dioxide as a source of carbon atoms. |
| A. | true |
| B. | false |
| Answer» C. | |
| 14. |
In photosynthesis, RuBP stands for _______ |
| A. | Ribulose Bisphosphate |
| B. | Ribulose urea Biphosphate |
| C. | Ribulose phosphate |
| D. | Ribulose biurea phosphate |
| Answer» B. Ribulose urea Biphosphate | |
| 15. |
Which of the following is not an example of a photoautotroph? |
| A. | bacteria |
| B. | plants |
| C. | cyanobacteria |
| D. | human beings |
| Answer» E. | |
| 16. |
Photosynthesis is a photochemical process. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 17. |
In photosynthesis, ATP stands for ________ |
| A. | Adenosine Triphosphate |
| B. | Amine Triphosphate |
| C. | Amine tri poly phosphate |
| D. | Ammonium Triphosphate |
| Answer» B. Amine Triphosphate | |
| 18. |
In photosynthesis, energy of sun is converted into chemical energy in the form of ________ |
| A. | ATP and NADPH |
| B. | ADP and NADPH |
| C. | ATP and NADP |
| D. | ADP and NADP |
| Answer» B. ADP and NADPH | |
| 19. |
In photochemistry of photosynthesis, NADPH stands for _______ |
| A. | Nicotinamide Adenine Dinucleotide Phosphate |
| B. | Nicotinamide Amine Dinucleotide Phosphate |
| C. | Nicotinamide Adenine Dinucleotide Phosphatic hydrogen |
| D. | Nicotinamide Amine Dinucleotide Phosphatic hydrogen |
| Answer» B. Nicotinamide Amine Dinucleotide Phosphate | |
| 20. |
C6H12O6 is a _________ |
| A. | Osmophile |
| B. | Trapiche |
| C. | Sugar |
| D. | Butanol fuel |
| Answer» D. Butanol fuel | |
| 21. |
A colored molecule is called ________ |
| A. | Epoxy |
| B. | Pigment |
| C. | Gouache |
| D. | Plaster |
| Answer» C. Gouache | |
| 22. |
The organelle in a plant cell where photosynthesis occurs is called _________ |
| A. | Rubisco |
| B. | Chloroplast |
| C. | Thylakoid |
| D. | Pigment |
| Answer» C. Thylakoid | |
| 23. |
Energy plantation does not have any impact on Bio-energy.a) Trueb) False 12.”ATP and NADPH are used to fix CO2 into carbohydrates” this process is termed as ________ |
| A. | Trueb) False 12.”ATP and NADPH are used to fix CO2 into carbohydrates” this process is termed as ________a) Carbon fixation |
| B. | False 12.”ATP and NADPH are used to fix CO2 into carbohydrates” this process is termed as ________a) Carbon fixationb) Reduction |
| C. | Carbon dating |
| D. | OxidationView Answer |
| Answer» C. Carbon dating | |
| 24. |
Choose the general formula of carbohydrates? |
| A. | [C2H2O2]n |
| B. | [CHO]n |
| C. | [CH2O]n |
| D. | [C2O2]n |
| Answer» D. [C2O2]n | |
| 25. |
Which is the region within thylakoid where water is split into oxygen? |
| A. | Foramen |
| B. | Serosa |
| C. | Lumen |
| D. | Mucosa |
| Answer» D. Mucosa | |
| 26. |
Which cycle is preferred for production of carbohydrates? |
| A. | Nutrient cycle |
| B. | Bio geo chemical cycle |
| C. | Calvin – Benson Cycle |
| D. | Sonnet cycle |
| Answer» D. Sonnet cycle | |
| 27. |
What does NADPH? |
| A. | Nicotinamide adenosine deca-nucleotide phosphate |
| B. | Nicotinamide adenine dinucleotide phosphate |
| C. | Nicotinamide adenine deca-nucleotide phosphate |
| D. | Nicotinamide adenosine dinucleo phosphor |
| Answer» C. Nicotinamide adenine deca-nucleotide phosphate | |
| 28. |
What is the full form of ATP? |
| A. | Adenosine Tetra-phosphate |
| B. | Adenosine tri-phosphate |
| C. | Adenosine Terra-phosphate |
| D. | Ambient temperature and pressure |
| Answer» C. Adenosine Terra-phosphate | |
| 29. |
Photosynthetic organisms which convert light energy into the chemical energy they need to develop grow, and reproduce are called as? |
| A. | Rubisco |
| B. | Pigment |
| C. | Autotrophs |
| D. | Glucose |
| Answer» D. Glucose | |
| 30. |
Photosynthesis is carried in how many stages? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 31. |
Complete the following reaction.H2O + CO2 → ________ |
| A. | 6H2O + 6CO2 → C6H12O6 + 6O2 |
| B. | 6H2O + 3CO2 → C6H6O6 + 4O2 |
| C. | 6H2O + 6CO2 → C6H12O12 + 12O2 |
| D. | 6H2O + 4CO2 → C+ HO3 |
| Answer» B. 6H2O + 3CO2 → C6H6O6 + 4O2 | |
| 32. |
What is used in conversion of sunlight energy into usable chemical energy in plants? |
| A. | Anthocyanin |
| B. | Cythochrome |
| C. | Chlorophyll |
| D. | Chitin |
| Answer» D. Chitin | |
| 33. |
The process by which plants, some bacteria and some protistans use the energy from sunlight to produce sugar? |
| A. | Taxonomy |
| B. | Metabolism |
| C. | Photosynthesis |
| D. | Osmosis |
| Answer» D. Osmosis | |
| 34. |
Honey is sweeter than cane sugar or corn syrup. Which one of the following carbon sugars is responsible for this? |
| A. | Dextrose |
| B. | Levulose |
| C. | Sucrose |
| D. | Fructose |
| Answer» C. Sucrose | |
| 35. |
In poorly ventilated buildings which one of the following inert gases can be accumulated? |
| A. | Helium |
| B. | Neon |
| C. | Argon |
| D. | Radon |
| Answer» E. | |
| 36. |
Which one of the following bacteria present in the soil produces a peculiar smell if it rains on perched soil? |
| A. | Streptomycetes |
| B. | Staphymycetes |
| C. | Diplomycetes |
| D. | Micrococcus |
| Answer» B. Staphymycetes | |
| 37. |
Which bacteria is responsible for the formation of curd? |
| A. | Lactic acid bacteria |
| B. | Lactobacillus Acidophillus |
| C. | Lactobacillus aureus |
| D. | Bacillus radicicola |
| Answer» C. Lactobacillus aureus | |
| 38. |
If we say the child has an IQ of 100, what does this means? |
| A. | The performance of the child is below average. |
| B. | The performance of the child is above average |
| C. | The mental age of the child is equal to his actual age. |
| D. | The performance of the child cannot be better. |
| Answer» D. The performance of the child cannot be better. | |
| 39. |
Which one of the following elements the drum of a Photostat machine is made up of: |
| A. | Aluminium |
| B. | Selenium |
| C. | Barium |
| D. | Caesium |
| Answer» C. Barium | |
| 40. |
Which one of the following statements is incorrect about laser? |
| A. | It is a technique for producing intense beams of light, ultraviolet or infrared radiation of different wavelength. |
| B. | Even in diamond laser beam can drill a hole. |
| C. | A variety of lasers have been made from solids like the ruby crystal and semi conducting materials, liquids and gases. |
| D. | All waves in laser, travel in phase. |
| Answer» B. Even in diamond laser beam can drill a hole. | |
| 41. |
Which gas is safe and an effective extinguisher for all confined fires? |
| A. | Nitrogen dioxide |
| B. | Carbon dioxide |
| C. | Sulphur dioxide |
| D. | Nitrous Oxide |
| Answer» C. Sulphur dioxide | |
| 42. |
Given bellow are the psychological manifestations of noise pollution. (i)Constriction of blood vessels (ii)Increase in the rate of heart beat (iii)Digestive spasms (iv)Dilation of pupil of the eye Select the correct options |
| A. | (i) and (ii) are correct |
| B. | (i) and (iii) are correct |
| C. | (ii) and (iv) are correct |
| D. | (i), (ii), (iii) and (iv) are correct |
| Answer» E. | |
| 43. |
Which one of the following waves are used by the common TV remote control? |
| A. | Radio waves |
| B. | Lasers |
| C. | Infrared waves |
| D. | Ultrasonic waves |
| Answer» D. Ultrasonic waves | |
| 44. |
Photosynthesis is : |
| A. | An Oxidation-Reduction reaction |
| B. | Synthesis reaction |
| C. | Organic reaction |
| D. | Replacement reaction |
| Answer» B. Synthesis reaction | |
| 45. |
Which of the following statements is/are correct about Light Reaction: I. In this reaction light energy is absorbed by chlorophyll pigments and converted into chemical energy. II. Energy is stored in the form of ATP III. NADPH2 is generated Options are: |
| A. | Both I and II are correct |
| B. | Both I and III are correct’ |
| C. | Only II is correct |
| D. | All I, II and III are correct |
| Answer» E. | |
| 46. |
What do you understand by NADP? |
| A. | It is an enzyme |
| B. | It is a co-enzyme |
| C. | A part of s-RNA |
| D. | A part of t-RNA |
| Answer» D. A part of t-RNA | |
| 47. |
. Which of the following statements is/are correct related to Dark Reaction: I. The process involves fixation and reduction of carbon dioxide in the stroma of the chloroplast. II. Light is necessary for the reaction. III. It is also known as Calvin Cycle. Options are: |
| A. | Both I and II are correct |
| B. | Both II and III are correct |
| C. | Both I and III are correct |
| D. | All I, II and III are correct |
| Answer» D. All I, II and III are correct | |
| 48. |
Name the external factors that affect photosynthesis process? |
| A. | Light Intensity |
| B. | Carbon dioxide concentration |
| C. | Temperature |
| D. | All of the above |
| Answer» E. | |
| 49. |
Mention the internal factors that influence photosynthesis? |
| A. | Size, position and structure of stomata |
| B. | Maintenance of the turgidity of the leaf cells |
| C. | Relative proportion and distribution of chloroplasts in the mesophyll |
| D. | All of the above |
| Answer» E. | |
| 50. |
In Photosynthesis process, how many molecules of NADPH and ATP are required to reduce six molecules of carbon dioxide to glucose? |
| A. | 3 ATP and 2 NADPH |
| B. | 6 ATP and 6 NADPH |
| C. | 12 ATP and 18 NADPH |
| D. | 18 ATP and 12 NADPH |
| Answer» E. | |