Q. In which phase do sister chromatids separate and move to opposite poles? (2019)
-
A.
Prophase
-
B.
Metaphase
-
C.
Anaphase
-
D.
Telophase
Solution
During Anaphase, sister chromatids are pulled apart and move toward opposite poles of the cell.
Correct Answer: C — Anaphase
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Q. In which phase do sister chromatids separate and move towards opposite poles? (2022)
-
A.
Prophase
-
B.
Metaphase
-
C.
Anaphase
-
D.
Telophase
Solution
During Anaphase, sister chromatids are pulled apart and move towards opposite poles of the cell.
Correct Answer: C — Anaphase
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Q. In which phase of the cell cycle does cytokinesis occur? (2021)
-
A.
G1 phase
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B.
S phase
-
C.
M phase
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D.
G2 phase
Solution
Cytokinesis occurs during the M phase, following mitosis, to divide the cytoplasm and form two daughter cells.
Correct Answer: C — M phase
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Q. In which phase of the cell cycle does the cell spend the majority of its life? (2021)
-
A.
M phase
-
B.
G1 phase
-
C.
S phase
-
D.
G2 phase
Solution
The G1 phase is where the cell spends most of its life, performing normal functions and growing.
Correct Answer: B — G1 phase
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Q. In which process does a substance change from solid to gas without becoming liquid? (2022)
-
A.
Melting
-
B.
Sublimation
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C.
Condensation
-
D.
Evaporation
Solution
The process in which a substance changes from solid to gas without becoming liquid is called sublimation.
Correct Answer: B — Sublimation
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Q. In which process does a substance change from solid to gas? (2022)
-
A.
Melting
-
B.
Sublimation
-
C.
Evaporation
-
D.
Condensation
Solution
The process in which a substance changes from solid to gas is called sublimation.
Correct Answer: B — Sublimation
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Q. In which state of matter do particles have the highest energy? (2023)
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A.
Solid
-
B.
Liquid
-
C.
Gas
-
D.
Bose-Einstein Condensate
Solution
Gas particles have the highest energy compared to solids and liquids, allowing them to move freely and occupy more space.
Correct Answer: C — Gas
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Q. In which state of matter do particles have the least amount of energy?
-
A.
Solid
-
B.
Liquid
-
C.
Gas
-
D.
Plasma
Solution
Particles in a solid have the least amount of energy compared to liquids, gases, and plasma.
Correct Answer: A — Solid
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Q. In which state of matter do particles have the strongest intermolecular forces? (2023)
-
A.
Gas
-
B.
Liquid
-
C.
Solid
-
D.
Plasma
Solution
In solids, particles are held together by strong intermolecular forces, giving them a definite shape and volume.
Correct Answer: C — Solid
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Q. In which state of matter do particles move freely and are far apart? (2021)
-
A.
Solid
-
B.
Liquid
-
C.
Gas
-
D.
None of the above
Solution
In gases, particles move freely and are far apart compared to solids and liquids.
Correct Answer: C — Gas
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Q. In which type of collision is kinetic energy conserved? (2019)
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A.
Elastic collision
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B.
Inelastic collision
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C.
Perfectly inelastic collision
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D.
All of the above
Solution
In an elastic collision, both momentum and kinetic energy are conserved.
Correct Answer: A — Elastic collision
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Q. In which type of population growth does the growth rate decrease as the population reaches its carrying capacity? (2019)
-
A.
Exponential growth
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B.
Logistic growth
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C.
Linear growth
-
D.
Cyclic growth
Solution
Logistic growth describes a population that grows rapidly at first and then slows as it approaches the carrying capacity.
Correct Answer: B — Logistic growth
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Q. In which type of reproduction do offspring inherit traits from both parents? (2020)
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A.
Asexual reproduction
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B.
Sexual reproduction
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C.
Budding
-
D.
Fragmentation
Solution
In sexual reproduction, offspring inherit genetic material from both parents, leading to genetic variation.
Correct Answer: B — Sexual reproduction
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Q. In which type of reproduction does fertilization occur outside the body? (2022)
-
A.
Internal fertilization
-
B.
External fertilization
-
C.
Asexual reproduction
-
D.
Parthenogenesis
Solution
External fertilization occurs when the sperm and egg unite outside the body, commonly seen in aquatic organisms.
Correct Answer: B — External fertilization
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Q. In which type of reproduction does fertilization occur? (2022)
-
A.
Asexual reproduction
-
B.
Binary fission
-
C.
Sexual reproduction
-
D.
Budding
Solution
Fertilization occurs in sexual reproduction, where male and female gametes fuse to form a zygote.
Correct Answer: C — Sexual reproduction
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Q. In which type of reproduction does genetic variation occur? (2019)
-
A.
Asexual reproduction
-
B.
Sexual reproduction
-
C.
Binary fission
-
D.
Fragmentation
Solution
Sexual reproduction involves the combination of genetic material from two parents, leading to genetic variation.
Correct Answer: B — Sexual reproduction
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Q. In which type of reproduction does regeneration occur? (2020)
-
A.
Asexual reproduction
-
B.
Sexual reproduction
-
C.
Both asexual and sexual reproduction
-
D.
None of the above
Solution
Regeneration is a form of asexual reproduction where an organism can regrow lost parts.
Correct Answer: A — Asexual reproduction
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Q. In which type of solid are the constituent particles held together by covalent bonds? (2022)
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A.
Ionic solids
-
B.
Covalent network solids
-
C.
Metallic solids
-
D.
Molecular solids
Solution
Covalent network solids are held together by a network of covalent bonds, resulting in very high melting points.
Correct Answer: B — Covalent network solids
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Q. In which type of solid are the constituent particles held together by van der Waals forces? (2022)
-
A.
Ionic solids
-
B.
Covalent solids
-
C.
Metallic solids
-
D.
Molecular solids
Solution
Molecular solids are held together by van der Waals forces.
Correct Answer: D — Molecular solids
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Q. Iron deficiency in plants typically leads to which of the following symptoms? (2022)
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A.
Stunted growth
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B.
Leaf curling
-
C.
Interveinal chlorosis
-
D.
Wilting
Solution
Iron deficiency causes interveinal chlorosis, where the areas between the veins of leaves turn yellow.
Correct Answer: C — Interveinal chlorosis
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Q. Iron is essential for which of the following functions in plants? (2022)
-
A.
Chlorophyll synthesis
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B.
Water uptake
-
C.
Nutrient transport
-
D.
Cell elongation
Solution
Iron is crucial for chlorophyll synthesis and is involved in various enzymatic reactions in plants.
Correct Answer: A — Chlorophyll synthesis
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Q. Solve the differential equation dy/dx = 2x + 1.
-
A.
y = x^2 + x + C
-
B.
y = x^2 + 2x + C
-
C.
y = 2x^2 + x + C
-
D.
y = x^2 + C
Solution
Integrating both sides, we get y = ∫(2x + 1)dx = x^2 + x + C.
Correct Answer: A — y = x^2 + x + C
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Q. Solve the differential equation dy/dx = 2y + 3. (2023)
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A.
y = Ce^(2x) - 3/2
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B.
y = Ce^(-2x) + 3/2
-
C.
y = 3e^(2x)
-
D.
y = 2e^(2x) + C
Solution
Using an integrating factor, we find the solution is y = Ce^(2x) - 3/2.
Correct Answer: A — y = Ce^(2x) - 3/2
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Q. Solve the differential equation dy/dx = 6x^2y.
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A.
y = Ce^(2x^3)
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B.
y = Ce^(3x^2)
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C.
y = Ce^(6x^2)
-
D.
y = Ce^(x^6)
Solution
This is a separable equation. Integrating gives y = Ce^(2x^3).
Correct Answer: A — y = Ce^(2x^3)
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Q. Solve the differential equation dy/dx = y/x. (2023)
-
A.
y = Cx
-
B.
y = Cx^2
-
C.
y = C/x
-
D.
y = C ln(x)
Solution
This is a separable equation. Integrating gives y = Cx.
Correct Answer: A — y = Cx
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Q. Solve the differential equation y' = 5 - 2y.
-
A.
y = 5/2 + Ce^(-2x)
-
B.
y = 5 + Ce^(-2x)
-
C.
y = 2 + Ce^(2x)
-
D.
y = 5/2 - Ce^(-2x)
Solution
This is a linear first-order equation. The solution is y = 5/2 + Ce^(-2x).
Correct Answer: A — y = 5/2 + Ce^(-2x)
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Q. Solve the differential equation y' = 5y + 3.
-
A.
y = (3/5) + Ce^(5x)
-
B.
y = (5/3) + Ce^(5x)
-
C.
y = Ce^(5x) - 3
-
D.
y = Ce^(3x) + 5
Solution
Using the integrating factor method, we find the solution y = (3/5) + Ce^(5x).
Correct Answer: A — y = (3/5) + Ce^(5x)
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Q. Solve the differential equation y'' - 3y' + 2y = 0.
-
A.
y = C1e^(2x) + C2e^(x)
-
B.
y = C1e^(x) + C2e^(2x)
-
C.
y = C1e^(-x) + C2e^(-2x)
-
D.
y = C1e^(3x) + C2e^(x)
Solution
The characteristic equation is r^2 - 3r + 2 = 0, which factors to (r - 1)(r - 2) = 0. The general solution is y = C1e^(x) + C2e^(2x).
Correct Answer: B — y = C1e^(x) + C2e^(2x)
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Q. Solve the equation y' = 6y + 12.
-
A.
y = 2 - Ce^(-6x)
-
B.
y = Ce^(6x) - 2
-
C.
y = 2 + Ce^(6x)
-
D.
y = 6Ce^(-x)
Solution
This is a first-order linear equation. The integrating factor method gives the solution y = 2 - Ce^(-6x).
Correct Answer: A — y = 2 - Ce^(-6x)
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Q. Solve the first-order differential equation dy/dx = y/x.
-
A.
y = Cx
-
B.
y = Cx^2
-
C.
y = C/x
-
D.
y = C ln(x)
Solution
This is a separable equation. Separating variables and integrating gives y = Cx.
Correct Answer: A — y = Cx
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