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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Name the stacked particle present on the inner surface of inner mitochondrial membrane. |
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Answer» Oxysomes present on the inner surface of inner mitochondrial membrane. |
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| 2. |
Who proposed the fluid mosaic model of plasma membrane in 1972? (a) Singer and Nicolson (b) Rober Hooke (c) Rrobertsons model (d) Camilo golgi |
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Answer» (a) Singer and Nicolson |
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| 3. |
Give an example for obligate mycorrhizal association. |
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Answer» Mycorrhizal association is found in pinus seeds i.e Pinus seeds do not germinate and establish without mycorrhiza. |
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| 4. |
How is mycoorrhizal association helpful in absorption of water and mineral in plants? |
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Answer» Mycorrhizal association help in water and mineral absorption. Fungal hyphae have a very large surface area that absorbs mineral ions and water from a much larger volume of soil. |
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| 5. |
Name the cell organelle rich in acid hydrolase |
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Answer» Lysosome cell organelle rich in acid hydrolase. |
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| 6. |
An organelle with internal cross section showing the characteristic 9 + 2 arrays is(a) micro tubule (b) micro lament (c) cilia and flagellum (d) tubulin |
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Answer» (c) cilia and flagellum |
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| 7. |
Name the type of obligatory association found in pinus seeds that promote germination. |
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Answer» The type of obligatory association found in pinus seeds that promote germination is Mycorrhiza. |
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| 8. |
Identify a type of molecular movement which is highly selective and requires special membrane proteins, but does not require energy. |
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Answer» Facilitated diffusion |
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| 9. |
Smaller, lipid-soluble molecules diffuse faster through cell membrane, but the movement of hydrophilic substances are facilitated by certain biomolecules named as ........ |
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Answer» Movement of hydrophilic substances are facilitated by certain biomolecules named as Proteins. |
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| 10. |
The excess of one element may inhibit the uptake of another element. What is this effect called? |
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Answer» Toxicity of micronutrients |
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| 11. |
What causes the leaves of grasses to roll in dry weather? |
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Answer» Presence of bulliform cells or motor cells |
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| 12. |
Identify the following. 1. Stress hormone 2. The shrinking of protoplasm due to continuous exosmosis 3. The positive pressure develops within the xylem of roots due to the absorption of water and minerals. |
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Answer» 1. Abscisic acid 2. Plasmolysis 3. Root pressure |
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| 13. |
Smaller, lipid-soluble molecules diffuse faster through cell membrane, but the movement of hydrophilic substances are facilitated by certain biomolecules. Name it. |
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Answer» It is Protein |
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| 14. |
The diagram below shows the cells placed in hypertonic solution and hypotonic solution. If the diagram ‘B’ is ‘turgid’ what will be diagram ‘A’? |
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Answer» Answer is A – Flaccid |
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| 15. |
What will happen to a plant cell when kept in hypotonic solution? |
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Answer» Cell become turgid |
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| 16. |
Look at the following figure in which two chambers, A and B, containing solutions are separated by a semipermeable membrane.Answer the following questions.1. Solution of which chamber has a lower water potential 2. In which direction will osmosis occur? 3. Which solution has a higher solute potential? 4. If one chamber has a Ψ of -2000KPa and the other -1000 KPa, which is the chamber that has the higher Ψ? |
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Answer» 1. Solution in B chamber has lower water potential. 2. Osmosis occurs from a to b. 3. A solution has higher solute potential. 4. The chamber having -ve 1000K Pa has the higher psi |
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| 17. |
The bending of wooden doors during rainy reasons is due to physiological phenomenon. Name it. |
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Answer» It is Imbibition |
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| 18. |
Give below is a diagram, where hypotonic solution is separated by a semipermeable membrane from a hypertonic solution and kept for a few hours.1. In which direction will the solvent move? From X to Y or Y to X. 2. Name the process of movement of the solvent. |
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Answer» 1. X to Y 2. Osmosis |
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| 19. |
Differences between the following. Diffusion and Osmosis |
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Answer» 1. Diffusion: It is the movement of solute from the region of higher concentration to region of lower concentration. 2. Osmosis: It is the movement of solvent from the region of higher concentration to region of lower concentration through semipermiable membrane |
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| 20. |
An unavoidable waste mechanism is found in higher plants during high temperature.1. Name the process.2. Why is it said so? |
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Answer» 1. Transpiration 2. It has merits and demerits. Since water and minerals are absorbed and translocated to distant sites by this process but 99% of water absorbed is transpired out. |
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| 21. |
Osmosis is a special kind of diffusion, in which water diffuses across the cell membrane. What are the factors influence rate and direction of osmosis? |
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Answer» Pressure and concentration gradient. |
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| 22. |
Water moves up against gravity and even for a tree of 20 m height, the tip receives water within two hours. Which is the most important physiological phenomenon responsible for the upward movement of water is |
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Answer» Transpirational pull |
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| 23. |
Absorption of water from the soil by dry seeds increases the, thus helping seedlings to come out of the soil. |
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Answer» It is due to Pressure |
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| 24. |
Why turgidity of the cell essential for plants? |
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Answer» It helps to maintain plant organs in normal shape |
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| 25. |
Endocrine glandLocationThyroidNeckThymus? |
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Answer» Near the heart. |
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| 26. |
Give the relationship between the rate constant and slope of the curve. |
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Answer» The slope of the curve for the variation in the concentration (R) vs. time (t) plot is equal to the negative of the rate constant for the reaction. |
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| 27. |
Assertion : Test cross is the cross between the `F_(1)` progeny and either of the parenty types Reason : Back cross is rhe cross between `F_(1)` progeny and the double recessive genotype |
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Answer» Correct Answer - D A cross of `F_(1)` hybrid with either of the two parents is known as back cross. Crossing of `F_(1)` individual having dominant phenpotype with its homozygous reccessie parent is called test cross. |
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| 28. |
Assertion : At `F_(2)` stage in monohybrid cross, both parental traits are expressed in the proportion of `3:1` Reason : The contrasting parental traits show blending at `F_(2)` stage |
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Answer» Correct Answer - C In `F_(2)` generation both the parental traits of a character are expressed in the ratio of three dominant to one recessive. |
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| 29. |
Chemical used to destroy or inactive harmful micro-organisms a. Desiccant b. Disinfectant c. Defsliants d. None |
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Answer» b. Disinfectant |
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| 30. |
Two carnote engines A and B have their sources at 1000 K and 1100 K and their sinks are at 400 K and 500 K respectively. If `eta_(A)` and `eta_(B)` are their efficiencies,A. `eta_(A)lt eta_(B)`B. `eta_(A)=eta_(B)`C. `eta_(A)gteta_(B)`D. Data is insufficient. |
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Answer» Correct Answer - C `eta_(A)=1-(400)/(1000)=.60` `eta_(B)=1-(500)/(1000)=.545` `thereforeeta_(A)gteta_(B)` |
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| 31. |
Why is ATP the only popular energy production molecule in the body? |
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Answer» ATP is commonly referred to as the "energy currency" of the cell, as it provides readily releasable energy in the bond between the second and third phosphate groups. The synthesis of ATP utilizes energy obtained from multiple catabolic mechanisms, including cellular respiration, beta-oxidation, and ketosis. |
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| 32. |
She sunbathes at the ______. A) sea B) desert C) mountain D) beach |
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Answer» Correct option is D) beach |
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| 33. |
At what stage does the meiosis occur in an organism exhibiting haploidic life cycle and mention the fate of the products thus produced. |
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Answer» In haplontic life cycle, the haploid stage is multicellular, and the diploid stage is a single cell, meiosis is "zygotic". In their life cycle, meiosis produces haploid cells that germinate to produce new organism |
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| 34. |
Two waves are given by `y_(1)=asin(omegat-kx)` and `y_(2)=a cos(omegat-kx)`. The phase difference between the two waves is -A. `pi//4`B. `pi`C. `pi//8`D. `pi//2` |
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Answer» Correct Answer - D `y_(1)=asin(omegat-kx)` and `y_(2)=acos(omegat-kx)=asin(omegat-kx+(pi)/(2))` Hence phase difference between these two is `(pi)/(2)` |
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| 35. |
______ is an area of sand or small stones at the edge of the sea. A) beach B) cliff C) island D) desert |
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Answer» Correct option is A) beach |
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| 36. |
What maximum frequency from following which can be reflected from ionosphere -A. 5 MHzB. 6GHzC. 5KHzD. 500 MHz |
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Answer» Correct Answer - A Frequency upto 30 MHz can be reflected from ionosphere. |
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| 37. |
______ is a large area of hot, dry land where is very much sand. A) sea B) desert C) forest D) lake |
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Answer» Correct option is B) desert |
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| 38. |
In a semiconducting material the mobilities of electrons and holes are `mu_(e)` and `mu_(h)` respectively. Which of the following is true?A. `mu_(h)gtmu_(e)`B. `mu_(e)gtmu_(h)`C. `mu_(e)=mu_(h)`D. None of these |
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Answer» Correct Answer - B Effective mass of holes are greater than the mass of electron so mobility of electron is more as compared to holes. `mu_(e)gtmu_(h)` |
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| 39. |
A very large pool of water with land all around is ______. A) garden B) object C) oath D) nut E) lake |
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Answer» Correct option is E) lake |
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| 40. |
On reduction with hydrogen , 3.6 g of an oxide of metal left 3.2 g of metal . If the simplest atomic weight of metal is 64, the simplest formula of the oxide isA. MOB. `M_(2)O_(3)`C. `M_(2)O`D. `M_(2)O_(5)` |
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Answer» Correct Answer - 3 `E=(3.2)/(0.4)xx8=64,mol.wt.=2xx32=64` `n=(64)/(64)=1` `therefore "Formula of metal oxide" = M_(2)O` |
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| 41. |
Have you observed images formed by a concave lens? What is the nature of the image? |
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Answer» Images is smaller, virtual and direct |
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| 42. |
What is observed here? |
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Answer» The coin seems to be lifted up. |
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| 43. |
Why does the ray of light undergo a deviation here? |
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Answer» The difference of speed of light rays in different media. |
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| 44. |
Where does the deviation of the ray take place? |
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Answer» At surface of water. |
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| 45. |
As the optical density of a medium increases, the speed of light through it decreases.What if the optical density decreases? |
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Answer» Speed of light increases. |
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| 46. |
Find out more examples of refraction from daily life. |
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Answer» The stars in the sky appear glittering
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| 47. |
What happens to the path of the light? |
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Answer» Path of light undergoes deviation. |
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| 48. |
Which is of greater optical density – air or glass? |
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Answer» Glass is of greater optical density – air or glass? |
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| 49. |
The image is direct and is above principal axis an object is kept at a distance of 30 cm away from a lens. An image of same size is formed. What is the focal length of the lens? |
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Answer» Image of size is formed when the object is kept at 2F \(\therefore\) 2f = 30 cm \(\therefore\) f = 15 cm \(\therefore\) 30/2 = 15 cm |
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| 50. |
A person who looks at an aquarium as shown in Fig. can see the base on the surface of water. What is the reason? |
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Answer» The light rays from the bottom of the aquarium reflect without undergoing refraction (Due to total internal reflection) |
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