

MCQOPTIONS
This section includes 49 Mcqs, each offering curated multiple-choice questions to sharpen your SRMJEEE knowledge and support exam preparation. Choose a topic below to get started.
1. |
The most widely used chemical for protoplast fusion, as fusogens, is |
A. | Manitol |
B. | Sorbitol |
C. | Mannol |
D. | Poly ethylene glycol (PEG) |
Answer» E. | |
2. |
DMSO (Dimethyl sulfoxide) is used as |
A. | Gelling agent |
B. | alkaylating agent |
C. | Chelating agent |
D. | Cryoprotectant |
Answer» E. | |
3. |
Hormone pair required for a callus to differentiate are |
A. | auxin and cytokinin |
B. | auxin and ethylene |
C. | auxin and absiccic acid |
D. | cytokinins and gibberllin |
Answer» B. auxin and ethylene | |
4. |
Synthetic seed is produced by encapsulating somatic embryo with |
A. | sodium chloride |
B. | sodium alginate |
C. | sodium acetate |
D. | sodium nitrate |
Answer» C. sodium acetate | |
5. |
The production of secondary metabolites require the use of |
A. | protoplast |
B. | cell suspension |
C. | meristem |
D. | auxillary buds |
Answer» C. meristem | |
6. |
Who is the father of tissue culture? |
A. | Bonner |
B. | Haberlandt |
C. | Laibach |
D. | Gautheret |
Answer» C. Laibach | |
7. |
In plant cell, digestion of fats occurs with the help of |
A. | lysosomes |
B. | Peroxisomes |
C. | glyoxisomes |
D. | microtubules |
Answer» D. microtubules | |
8. |
The final acceptor of electrons in the electron transport chain is |
A. | Water |
B. | Oxygen |
C. | Hydrogen |
D. | Cytochrome b |
Answer» C. Hydrogen | |
9. |
The net gain of ATP produced during the oxidation of one glucose molecule in a plant cell |
A. | 38 ATP molecules |
B. | 30 ATP molecules |
C. | 36 ATP molecules |
D. | 24 ATP molecules |
Answer» D. 24 ATP molecules | |
10. |
During respiration yeast converts glucose to |
A. | ethanol and water |
B. | ethanol and oxygen |
C. | ethanol and CO2 |
D. | lactic acid and CO2 |
Answer» C. ethanol and CO2 | |
11. |
Conversion of pyruvic acid into ethyl alcohol is facilitated by the enzymes: |
A. | carboxylase |
B. | phosphatase |
C. | dehygrogenase |
D. | carboxylase and dehygrogenase |
Answer» E. | |
12. |
R.Q. of fatty substances is generally: |
A. | unity |
B. | Zero |
C. | more than one |
D. | less than one |
Answer» E. | |
13. |
In succulent xerophytes the R.Q is : |
A. | Zero |
B. | unity |
C. | less than one |
D. | more than one |
Answer» B. unity | |
14. |
Common immediate source of energy in cellular activity: |
A. | NAD |
B. | ATP |
C. | DNA |
D. | RNA |
Answer» C. DNA | |
15. |
Kreb’s cycle take place in |
A. | vesicles of ER |
B. | Mitochondrial matrix |
C. | lysosomes |
D. | Dictyosomes |
Answer» C. lysosomes | |
16. |
The annual plant exchange of gases takes place mainly through |
A. | Leaf scars |
B. | lenticels |
C. | stomata |
D. | stem |
Answer» D. stem | |
17. |
Respiration is |
A. | Anabolic process |
B. | Exothermic process |
C. | Endothermic process |
D. | Endergonic process |
Answer» C. Endothermic process | |
18. |
The site of glycolysis in a cell is |
A. | chloroplast |
B. | nucleus |
C. | cytoplasm |
D. | mitochondria |
Answer» D. mitochondria | |
19. |
Respiratory enzymes are located in |
A. | mitochondrial matrix |
B. | cristae |
C. | perimitochondrial space |
D. | outer membrane |
Answer» C. perimitochondrial space | |
20. |
The process of respiration in green plants occurs |
A. | only when stomata are open |
B. | only when photosynthesis ceases |
C. | only when photosynthesis is in progress |
D. | At all times |
Answer» E. | |
21. |
Which element is required for Nodulation in Legumes? |
A. | Mn |
B. | Fe |
C. | Mo |
D. | B |
Answer» D. B | |
22. |
The most widely accepted theory accepted to explain the translocation of carbohydrates in higher plants |
A. | Root pressure theory |
B. | Osmotic theory |
C. | Imbibition theory |
D. | Mass flow theory |
Answer» E. | |
23. |
First experiments related to the method of hydroponics were done by |
A. | Knop |
B. | Sachs |
C. | Arnon |
D. | Hill |
Answer» C. Arnon | |
24. |
Which of the following is essential for Nitrogen Fixation by leguminous plants? |
A. | Chlorophyll |
B. | Leghaemoglobin |
C. | Anthocyanin |
D. | Phycocyanin |
Answer» C. Anthocyanin | |
25. |
Ion can be accumulated against concentration gradient due to? |
A. | Mass flow |
B. | Active uptake |
C. | Passive uptake |
D. | Donnan equilibrium |
Answer» C. Passive uptake | |
26. |
Which of the following bacterium brings about denitrification? |
A. | Pseudomonas |
B. | Rhizobium |
C. | Azotobacter |
D. | Nitrobacter |
Answer» B. Rhizobium | |
27. |
Bacteroid means |
A. | dead bacteria |
B. | living bacteria |
C. | A bacteria like substance |
D. | living bacteria but cannot divide |
Answer» E. | |
28. |
Plant absorb the element nitrogen in the form |
A. | nitrogen gas |
B. | nitrites |
C. | nitrates |
D. | nitric acid |
Answer» D. nitric acid | |
29. |
Plant require Fe and Mg for |
A. | Synthesis of chlorophyll |
B. | Opening and closing of stomata |
C. | Translocation of carbohydrates |
D. | None of these |
Answer» B. Opening and closing of stomata | |
30. |
Molybdenum is involved in plant metabolism in |
A. | Translocation of solutes |
B. | Tryptophan synthesis |
C. | ABA synthesis |
D. | Nitrate reduction |
Answer» E. | |
31. |
Hydroponics is |
A. | Growing of aquatic plants |
B. | Growing off floating aquatic plants |
C. | Soilless cultivation of plants |
D. | Growing of plants inside water |
Answer» D. Growing of plants inside water | |
32. |
Little leaf disease is due to the deficiency of |
A. | Nitrogen |
B. | Zinc |
C. | Manganese |
D. | Molybdenum |
Answer» C. Manganese | |
33. |
The disease “die back of shoots” is caused due to the deficiency of the following microelements |
A. | Copper |
B. | Chlorine |
C. | Manganese |
D. | Molybdenum |
Answer» B. Chlorine | |
34. |
The essential element for the synthesis of auxin is |
A. | Zinc |
B. | Sulphur |
C. | Potassium |
D. | Phosphorus |
Answer» B. Sulphur | |
35. |
Which of the following is necessary for biological nitrogen fixation? |
A. | Copper |
B. | Zinc |
C. | Manganese |
D. | Molybdenum |
Answer» E. | |
36. |
Stomata open at night and close during day time in |
A. | Xerophytes |
B. | Mesophytes |
C. | Succulents |
D. | Hydrophytes |
Answer» D. Hydrophytes | |
37. |
Transpiration is least in |
A. | High atmospheric humidity |
B. | good soil moisture |
C. | high wind velocity |
D. | dry environment |
Answer» B. good soil moisture | |
38. |
Which one of the following is used for measuring the rate of transpiration? |
A. | Porometer |
B. | Osmometer |
C. | Moll’s experiment |
D. | Potometer |
Answer» E. | |
39. |
What is the action spectrum of transpiration? |
A. | Orange and red |
B. | Green and ultraviolet |
C. | Blue and red |
D. | None of these |
Answer» D. None of these | |
40. |
Which of the following is an anti-transpirant |
A. | PMA |
B. | PAN |
C. | IAA |
D. | AUG |
Answer» B. PAN | |
41. |
Water absorption takes place through |
A. | Lateral roots |
B. | Root cap |
C. | Root hairs |
D. | Tap root |
Answer» D. Tap root | |
42. |
The hormone which signals the closure of stomata is |
A. | Auxins |
B. | Cytokinine |
C. | Gibberelline |
D. | Abscisic acid |
Answer» E. | |
43. |
Active uptake of minerals by roots mainly depends on the |
A. | Availability of oxygen |
B. | Temperature |
C. | Light |
D. | Availability of CO2 |
Answer» B. Temperature | |
44. |
Cooling of plants is caused by |
A. | Guttaion |
B. | Photorespiration |
C. | Transpiration |
D. | Assimilation |
Answer» D. Assimilation | |
45. |
The marine animals that kept in fresh water burst. It shows the process of |
A. | Exosmosis |
B. | Endoosmosis |
C. | Plasmolysis |
D. | Deplasmolysis |
Answer» C. Plasmolysis | |
46. |
Plasmolysis occurs due to |
A. | Absorption |
B. | Osmosis |
C. | Endoosmosis |
D. | Exosmosis |
Answer» E. | |
47. |
Loss of water from the stomata of leaves are known as |
A. | Guttation |
B. | Exudation |
C. | Transpiration |
D. | Evaporation |
Answer» D. Evaporation | |
48. |
The water potential of pure water at atmospheric pressure is |
A. | -2.3 bar |
B. | +2.3 bar |
C. | Zero bar |
D. | One bar |
Answer» D. One bar | |
49. |
The water readily available to plants for absorption by roots is |
A. | Gravitational water |
B. | Capillary water |
C. | Rain water |
D. | Hygroscopic water |
Answer» C. Rain water | |