Biology
Which scientist is credited with proposing the theory of evolution by natural selection? A) Gregor Mendel
B) Charles Darwin
C) Louis Pasteur
D) Linnaeus
B) Charles Darwin
Which of the following represents the correct half-reaction for the reduction of copper ions to copper metal?
A) Cu²⁺ + 2e⁻ → Cu
B) Cu → Cu²⁺ + 2e⁻
C) Cu → Cu⁺ + e⁻
D) Cu⁺ + e⁻ → Cu
A) Cu²⁺ + 2e⁻ → Cu
Which of the following is the derivative of f(x)=3x^2+2x?
A) 6x+2 B) 3x^2+2x C) 6x+2x D) 6x+2x^2
A) 6x+2
Which of the following is a primary function of a sensor? A) To convert physical quantities into electrical signals B) To store data for future analysis C) To generate mechanical energy D) To regulate temperature in a system
A) To convert physical quantities into electrical signals
what is the largest planet in the solar system?
a) Jupiter b)Earth c) Saturn d) Mars
a) Jupiter
Which of the following is an example of an abiotic factor in an ecosystem? A) Plants
B) Sunlight
C) Predators
D) Decomposers
B) Sunlight
What is the standard electrode potential (E°) of the following cell if the half-reactions are as follows:
Ag++e−→Ag+e−→Ag (E° = 0.80 V)
Cu2++2e−→Cu (E° = 0.34 V)
A) 0.46 V
B) 1.14 V
C) 0.80 V
D) 0.34 V
A) 0.46 V
If f(x)=1/2x^3−4x^2+6x+1 , what is f′(x)?
A) 3/2x^2−8x+6
B) 3/2x^2−8x
C)3/2x^3−8x^2+6
D) 3/2x^3−8x^2+6x
A) 3/2x^2−8x+6
What principle is commonly used in a thermocouple sensor? A) Photoelectric effect B) Hall effect C) Seebeck effect D) Piezoelectric effect
C) Seebeck effect
How many surah are there in Quran?
A) 112 B)114 C) 116 D)118
B)114
Which organelle is responsible for the production of energy in a cell? a) Nucleus b) Mitochondria c) Endoplasmic reticulum d) Golgi apparatus
b) Mitochondria
Which of the following reactions represents a nucleophilic substitution reaction?
A) Esterification
B) Hydrogenation
C) Saponification
D) Halogenation of an alkane
D) Halogenation of an alkane
What is the integral of e^2x dx?
A) e^2x/2+C
B) e^2x+C
c) 2e^2x+C
D) 1/2 e^2x+C
A) e^2x/2+C
Which of the following sensors is primarily used for detecting distance? A) Thermistor B) Photodiode C) Ultrasonic sensor D) Strain gauge
C) Ultrasonic sensor
What is the actual largest desert in the world?
a) Sahara Desert b) Gobi Desert c) Arabian Desert d) Antarctica
d) Antarctica
Which of the following best describes biodiversity? A) The variety of ecosystems within a specific geographic area B) The number of species present in an ecosystem C) The genetic variation within and between species D) The total biomass of organisms in a habitat
C) The genetic variation within and between species
What is the major product obtained from the following reaction? CH3CH2CH2Br+KOH→?
A) CH₃CH₂CH₂OH
B) CH₃CH₂CH₂COOH
C) CH₃CH₂CH=CH₂
D) CH₃CH₂CH₂CHO
A) CH₃CH₂CH₂OH
If f(x)=x^3−4x^2+5x+2, what is f′′(x)?
A) 6x−8
B) 3x^2−8x+5
C) 6x^2−8x+5
D) 3x^2−8x
C) 6x^2−8x+5
In a strain gauge, what property changes in response to applied force or strain? A) Resistance B) Inductance C) Capacitance D) Voltage
A) Resistance
what is the largest country in Africa ?
a) Nigeria b) Algeria c) Egypt d) Sudan
b) Algeria
In genetics, what term describes the phenomenon where one gene influences multiple, seemingly unrelated phenotypic traits? A) Epistasis B) Pleiotropy C) Polygenic inheritance D) Codominance
B) Pleiotropy
Which of the following compounds undergoes E1 elimination most readily?
A) 2-methylpropane
B) 2-methylbutane
C) 2-methylpentane
D) 2-methylhexane
A) 2-methylpropane
Given f(x)=1/x, what is the area enclosed between the curve, the x-axis, and the lines x=1 and x=3?
A) ln(3)−ln(1)ln(3)−ln(1)
B) ln(3)−ln(1)+2ln(3)−ln(1)+2
C) ln(3)−ln(1)−2ln(3)−ln(1)−2
D) ln(3)−ln(1)−1ln(3)−ln(1)−1
B) ln(3)−ln(1)+2ln(3)−ln(1)+2
What is the typical operating principle of a piezoelectric sensor? A) Variation in resistance with temperature B) Generation of electric charge under mechanical stress C) Production of magnetic field in response to current D) Emission of photons under excitation
B) Generation of electric charge under mechanical stress
How many countries are there in the United Kingdom?
A)2 B)3 C)4 D)5
C)4
What are 4 four types of evolution?
divergent evolution, convergent evolution, parallel evolution, and coevolution
In a galvanic cell, where oxidation and reduction reactions occur, which electrode does reduction take place at?
Cathode
If f(x)=xsin(x)f, what is the value of ∫0π f(x) dx?
π
In a thermistor, how does resistance change with temperature?
Exponentially
Three countries with a letter 'f' ?
France , Finland , Fiji