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UPSC Civil services Entrance exams General Studies test # General Science Cell Cycle and Cell Division Prepare / Learn

Q1. M phase represents

A. Meiosis I phase

B. Mitosis phase

C. Metaphase

D. Meiosis phase

Answer : Option B
Explaination / Solution:

The M Phase represents the phase when the actual cell division or mitosis occurs/starts during cell cycle.

UPSC Civil services Entrance exams General Studies test # General Science Motion in A Plane Prepare / Learn

Q2.

Multiplying a vector $\vec{v}$ by a positive real number $λ$

A. gives a scalar that is

λ

times the magnitude of

\vec{v}

B. gives a vector

\vec{v^{'}}

λ \vec{v}

in a direction opposite to

\vec{v}

C. gives a scalar that is

λ

times the polar angle of

\vec{v}

D. gives a vector

\vec{v^{'}}

λ \vec{v}

in the same direction as

\vec{v}

Answer : Option D
Explaination / Solution:

When a vector is multiplied by a positive number (for example 2, 3 ,5, 60 unit etc.) or a scalar only its magnitude is changed but its direction remains the same as that of the original vector.

UPSC Civil services Entrance exams General Studies test # General Science Surface Chemistry Prepare / Learn

Q3. Which one of the following is an example of micelle system?

A. Protein and water

B. Soap and water

C. None of these

D. Rubber and benzene

Answer : Option B
Explaination / Solution:

Soap have hydrophobic tails and hydrophilic heads so they can act micelle.

UPSC Civil services Entrance exams General Studies test # General Science Development Experience Of India a Comparison with Neighbors Prepare / Learn

Q4. Which policy aimed to combine the establishment of rural communes with a crash programme of village industrialisation?

A. Great Proletarian Cultural Revolution

B. Economic reform

C. SEZ

D. Great Leap Forward

Answer : Option D
Explaination / Solution:

In GLF campaign , people were encouraged to set up industries in their backyards.

UPSC Civil services Entrance exams General Studies test # General Science Electric Charges and Fields Prepare / Learn

Q5. Conservation of charges in tribo electric charging

A. implies half are positively charged and other half are neutral

B. implies one is positively charged and the other is negatively charged.

C. implies both are positively charged

D. implies both are negatively charged

Answer : Option B
Explaination / Solution:

The triboelectric effect (also known as triboelectric charging) is a type of contact electrification in which certain materials become electrically charged after they come into frictional contact with a different material. Rubbing glass with fur, or a plastic comb through the hair, can build up triboelectricity.

When we charge something with static electricity, no electrons are made or destroyed. No new protons appear or disappear. Electrons are just moved from one place to another. The net, or total, electric charge stays the same. This is called the principle of conservation of charge.

If a glass rod is rubbed with silk, some electrons moves from glass rod to silk no new charge is generated or destroyed.

UPSC Civil services Entrance exams General Studies test # General Science Mechanical Properties of Solids Prepare / Learn

Q6. Stress is

A. force per unit length

B. force per unit area

C. total applied force

D. three point average of forces

Answer : Option B
Explaination / Solution:
No Explaination.

UPSC Civil services Entrance exams General Studies test # General Science Biotechnology Principles and Processes Prepare / Learn

Q7. EtBr fluoresces at the wavelength

A. 400 nm

B. 254 nm

C. 340 nm

D. 500 nm

Answer : Option B
Explaination / Solution:

Ethidium bromide is an intercalating agent commonly used as a fluorescent tag (nucleic acid stain) in molecular biology laboratories for techniques such as agarose gel electrophoresis. It is commonly abbreviated as "EtBr", which is also an abbreviation for bromoethane. When exposed to ultraviolet light, it will fluoresce with an orange colour, intensifying almost 20-fold after binding to DNA. It fluoresces at the wavelength at 254 nm.

UPSC Civil services Entrance exams General Studies test # General Science Thermodynamics Prepare / Learn

Q8. Diathermic wall is

A. a thermally conducting wall that does not allow flow of heat from one body to another

B. a thermally insulating wall that does not allow flow of heat from one body to many

C. a thermally conducting wall that allows flow of heat from one body to another

D. a thermally insulating wall that allows flow of heat from one body to another

Answer : Option C
Explaination / Solution:

A wall which prevents thermal interaction is known as adiabatic wall and a system enclosed within an adiabatic wall is called thermally isolated. If exchange of heat takes place between the system and surroundings through the boundary wall, the boundary is called diathermic wall.

UPSC Civil services Entrance exams General Studies test # General Science Excretory Products and their Elimination Prepare / Learn

Q9. Ascending limb of Henle’s loop is not permeable for :

A. H₂O

B. K+

C. Na+

D. Cl−

Answer : Option A
Explaination / Solution:

Ascending limb of Henle’s is not permeable to water. The descending limb is although permeable to water. Counter current exchange takes place between the loop of Henle’s and arteries surrounding it.

UPSC Civil services Entrance exams General Studies test # General Science Equilibrium Prepare / Learn

Q10. During the process of transformation from liquid to vapour, the pressure exerted by the water molecules at a given temperature remains constant. This is called

A. melting point of water

B. Boiling point of water

C. freezing point of water

D. vapour pressure of water

Answer : Option D
Explaination / Solution:

The number of water molecules from the gaseous state into the liquid state also increases till the equilibrium is attained.

i.e.rate of evaporation = rate of condensation
H2O(l) ⇌ H2O (vap)

At equilibrium the pressure exerted by the water molecules at a given temperature remains constant and is called the equilibrium vapour pressure of water increases with temperature.