Q. What is the standard temperature and pressure (STP) in Kelvin and atm? (2020)
-
A.
0 K and 1 atm
-
B.
273 K and 1 atm
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C.
100 K and 1 atm
-
D.
273 K and 0 atm
Solution
Standard temperature and pressure (STP) is defined as 273 K and 1 atm.
Correct Answer: B — 273 K and 1 atm
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Q. What is the standard unit of time in the SI system? (2020)
-
A.
Minute
-
B.
Hour
-
C.
Second
-
D.
Day
Solution
The standard unit of time in the SI system is the second (s).
Correct Answer: C — Second
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Q. What is the structure of a nucleotide?
-
A.
Sugar, phosphate, and base
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B.
Amino group, carboxyl group, and side chain
-
C.
Glycerol and fatty acids
-
D.
Monosaccharides
Solution
A nucleotide consists of a sugar, a phosphate group, and a nitrogenous base.
Correct Answer: A — Sugar, phosphate, and base
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Q. What is the structure of DNA described as? (2022)
-
A.
Single helix
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B.
Double helix
-
C.
Triple helix
-
D.
Linear strand
Solution
DNA is described as a double helix, consisting of two strands that wind around each other.
Correct Answer: B — Double helix
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Q. What is the structure of DNA primarily composed of? (2023)
-
A.
Amino acids
-
B.
Nucleotides
-
C.
Fatty acids
-
D.
Monosaccharides
Solution
DNA is composed of nucleotides, which include a sugar, phosphate, and nitrogenous base.
Correct Answer: B — Nucleotides
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Q. What is the sum of the angles in a triangle? (2017)
-
A.
180 degrees
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B.
360 degrees
-
C.
90 degrees
-
D.
270 degrees
Solution
The sum of the angles in a triangle is always 180 degrees.
Correct Answer: A — 180 degrees
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Q. What is the sum of the coefficients in the expansion of (2 + 3)^4? (2022)
-
A.
81
-
B.
64
-
C.
100
-
D.
125
Solution
The sum of the coefficients is (2 + 3)^4 = 5^4 = 625.
Correct Answer: A — 81
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Q. What is the sum of the coefficients in the expansion of (x + 2)^5? (2021)
Solution
The sum of the coefficients is found by substituting x=1. So, (1 + 2)^5 = 3^5 = 243.
Correct Answer: B — 64
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Q. What is the sum of the complex numbers 1 + 2i and 3 - 4i? (2023)
-
A.
4 - 2i
-
B.
4 + 2i
-
C.
2 - 2i
-
D.
2 + 2i
Solution
(1 + 2i) + (3 - 4i) = (1 + 3) + (2 - 4)i = 4 - 2i.
Correct Answer: A — 4 - 2i
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Q. What is the sum of the complex numbers 3 + 2i and 1 - 4i? (2023)
-
A.
4 - 2i
-
B.
2 - 2i
-
C.
4 + 2i
-
D.
2 + 2i
Solution
(3 + 2i) + (1 - 4i) = (3 + 1) + (2 - 4)i = 4 - 2i.
Correct Answer: A — 4 - 2i
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Q. What is the sum of the roots of the equation 2x² - 4x + 1 = 0? (2023)
Solution
The sum of the roots is given by -b/a = 4/2 = 2.
Correct Answer: A — 2
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Q. What is the sum of the roots of the equation 3x² + 12x + 9 = 0? (2021)
Solution
The sum of the roots is given by -b/a = -12/3 = -4.
Correct Answer: A — -4
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Q. What is the symbol for Gold?
Solution
The symbol for Gold is Au.
Correct Answer: A — Au
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Q. What is the temperature in Celsius if the temperature in Kelvin is 273 K?
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A.
0°C
-
B.
100°C
-
C.
-273°C
-
D.
273°C
Solution
To convert Kelvin to Celsius, use the formula: °C = K - 273. Therefore, 273 K - 273 = 0°C.
Correct Answer: A — 0°C
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Q. What is the temperature of a gas in Kelvin if its temperature in Celsius is 25°C? (2019)
-
A.
273 K
-
B.
298 K
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C.
310 K
-
D.
325 K
Solution
Temperature in Kelvin (K) = Temperature in Celsius (°C) + 273.15 = 25 + 273.15 = 298.15 K.
Correct Answer: B — 298 K
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Q. What is the term containing x^2 in the expansion of (3x - 4)^6?
-
A.
-1440
-
B.
720
-
C.
-720
-
D.
1440
Solution
The term containing x^2 is given by C(6,2) * (3x)^2 * (-4)^(6-2) = 15 * 9 * 256 = -1440.
Correct Answer: A — -1440
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Q. What is the term containing x^2 in the expansion of (x + 4)^6?
-
A.
240
-
B.
360
-
C.
480
-
D.
600
Solution
The term containing x^2 is given by C(6,2) * (4)^4 * (x)^2 = 15 * 256 * x^2 = 3840.
Correct Answer: C — 480
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Q. What is the term containing x^5 in the expansion of (2x + 3)^6?
-
A.
540
-
B.
720
-
C.
810
-
D.
900
Solution
The term containing x^5 occurs when k = 5. Using the binomial theorem, the term is C(6,5) * (2x)^5 * 3^1 = 6 * 32 * 3 = 576.
Correct Answer: B — 720
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Q. What is the term containing x^5 in the expansion of (2x - 3)^8?
-
A.
-6720
-
B.
6720
-
C.
-13440
-
D.
13440
Solution
The term containing x^5 occurs when k = 5. Using the binomial theorem, the term is C(8,5) * (2x)^5 * (-3)^3 = 56 * 32 * (-27) = -48384.
Correct Answer: A — -6720
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Q. What is the term for a flower that has both male and female reproductive structures? (2019)
-
A.
Unisexual
-
B.
Bisexual
-
C.
Asexual
-
D.
Monoecious
Solution
A bisexual flower contains both male (stamens) and female (pistils) reproductive structures.
Correct Answer: B — Bisexual
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Q. What is the term for a flower with both male and female reproductive structures? (2019)
-
A.
Unisexual
-
B.
Bisexual
-
C.
Asexual
-
D.
Monoecious
Solution
A bisexual flower contains both male (stamens) and female (pistils) reproductive structures.
Correct Answer: B — Bisexual
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Q. What is the term for a solution that contains the maximum amount of solute that can dissolve at a given temperature? (2022)
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A.
Unsaturated solution
-
B.
Saturated solution
-
C.
Supersaturated solution
-
D.
Concentrated solution
Solution
A saturated solution is one that contains the maximum amount of solute that can dissolve at a specific temperature.
Correct Answer: B — Saturated solution
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Q. What is the term for an organism that has two identical alleles for a trait? (2022)
-
A.
Heterozygous
-
B.
Homozygous
-
C.
Dominant
-
D.
Recessive
Solution
An organism with two identical alleles for a trait is called homozygous.
Correct Answer: B — Homozygous
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Q. What is the term for an organism's genetic makeup? (2022)
-
A.
Phenotype
-
B.
Genotype
-
C.
Allele
-
D.
Trait
Solution
The genetic makeup of an organism is referred to as its genotype.
Correct Answer: B — Genotype
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Q. What is the term for species that are found nowhere else on Earth? (2022)
-
A.
Endemic species
-
B.
Invasive species
-
C.
Keystone species
-
D.
Threatened species
Solution
Endemic species are those that are found nowhere else on Earth and are often vulnerable to extinction.
Correct Answer: A — Endemic species
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Q. What is the term for species that are found only in a specific geographic area? (2020)
-
A.
Endemic species
-
B.
Invasive species
-
C.
Keystone species
-
D.
Indicator species
Solution
Endemic species are those that are found only in a specific geographic area.
Correct Answer: A — Endemic species
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Q. What is the term for the ability of a muscle to respond to a stimulus? (2023)
-
A.
Contractility
-
B.
Excitability
-
C.
Extensibility
-
D.
Elasticity
Solution
Excitability refers to the ability of a muscle to respond to a stimulus, such as a nerve impulse.
Correct Answer: B — Excitability
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Q. What is the term for the ability of muscles to respond to stimuli? (2023)
-
A.
Contractility
-
B.
Excitability
-
C.
Extensibility
-
D.
Elasticity
Solution
Excitability refers to the ability of muscles to respond to stimuli, such as nerve impulses.
Correct Answer: B — Excitability
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Q. What is the term for the arrangement of flowers on a stem? (2023)
-
A.
Inflorescence
-
B.
Peduncle
-
C.
Receptacle
-
D.
Calyx
Solution
Inflorescence refers to the arrangement of flowers on a stem.
Correct Answer: A — Inflorescence
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Q. What is the term for the change of state from solid directly to gas? (2020)
-
A.
Sublimation
-
B.
Deposition
-
C.
Evaporation
-
D.
Condensation
Solution
Sublimation is the process where a solid changes directly into a gas without passing through the liquid state.
Correct Answer: A — Sublimation
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