The square of standard deviation is called:
- (A) Variance
- (B) Mean
- (C) Dispersion
- (D) Range
- (A) Variance
In statistics, VARIANCE is the average of the squared deviations from the mean. The standard deviation is the square root of the variance. So, squaring the standard deviation gives you the variance.
(B) Mean: The mean is a measure of central tendency and represents the average value of a data set.
(C) Dispersion: Dispersion is a general category of statistical measures that includes variance, standard deviation, and range. It describes how spread out the data is and is not a specific mathematical result of squaring a value.
(D) Range: The range is the difference between the maximum and minimum values in a data set. It is a simple measure of dispersion but is not calculated by squaring the standard deviation.
In the plant cell which reaction occurs in the stroma of the chloroplasts?
- (A) Calvin cycle
- (B) Fermentation
- (C) Krebs cycle
- (D) Decarboxylation
- (A) Calvin cycle
The Calvin cycle, also known as light-independent reactions or dark reactions, takes place in the stroma of the chloroplasts. This process uses ATP and NADPH from light-dependent reactions to convert carbon dioxide into sugar molecules, specifically glucose, through carbon fixation, reduction, and RuBP regeneration.
Stimulus intensity is detected in the brain by:
- (A) The number of actor potentials per second
- (B) The threshold potential
- (C) The amplitude of the action potential
- (D) The number of synapses crossed
- (A) The number of actor potentials per second.
The correct option is (A) The number of actor potentials per second.
- Frequency Coding: The nervous system shows the intensity of a stimulus with frequency coding. A stronger stimulus makes a neuron fire more often, leading to a higher number of action potentials per second.
- All-or-None Law: Action potentials follow an “all-or-none” rule. Once the threshold is reached, the neuron sends a signal of a fixed size and duration. Since the size stays the same, the only way to indicate a “stronger” stimulus is to send more signals in a shorter time.
Who gave the idea to combine the internet with the hypertext concept?
- (A) Steve Jobs
- (B) Bill Gates
- (C) Tim Berners-Lee
- (D) Jeff Bezos
- (C) Tim Berners-Lee
The credit for providing the idea of integrating the internet and the hypertext concept goes to Sir Tim Berners-Lee, which led to the development of the World Wide Web in 1989.
While working at the CERN research facility, a laboratory for studying the structure of matter, Tim Berners-Lee conceived the idea of integrating the internet and the hypertext concept.
While working at the CERN research facility, a laboratory for studying the structure of matter, Tim Berners-Lee conceived the idea of integrating the internet and the hypertext concept.
The energy value of fats and oils is _______ more than carbohydrates.
- (A) 4.25 times
- (B) 2.25 times
- (C) 3.25 times
- (D) 5.25 times
- (B) 2.25 times
Fats and oils contain about 9 kcal/g, whereas carbohydrates, as well as proteins, contain about 4 kcal/g. Hence, fats and oils contain 2.25 times as many calories as carbohydrates and proteins, as 9/4 = 2.25. Thus, the correct answer is (B) 2.25 times.
Average age of A and B is 30 years, that of B and C is 32 years and the average age of C and A is 34 years. The age of C is:
- (A) 33 years
- (B) 34 years
- (C) 35 years
- (D) 36 years
- (D) 36 years
Given:
A + B = 60
B + C = 64
C + A = 68
Adding the above three equations:
(A + B) + (B + C) + (C + A) = 60 + 64 + 68
2(A + B + C) = 192
Therefore:
A + B + C = 96
And as A + B = 60,
Therefore C = 96 – 60 = 36 years
B + C = 64
C + A = 68
Adding the above three equations:
2(A + B + C) = 192
Therefore:
And as A + B = 60,
Therefore C = 96 – 60 = 36 years
Operation of Zarb-e-Azb underwent in the former FATA. “Azb” was the name of:
- (A) Sword of the Holy Prophet (SAW)
- (B) Sword of Hazrat Ali (R.A)
- (C) A two headed arrow
- (D) War against enemies of humanity
- (A) Sword of the Holy Prophet (SAW)
The name “Zarb-e-Azb” is derived from the Arabic language, where “Zarb” means strike or blow, and “Azb” relates to one of the Prophet Muhammad (SAW)’s nine swords. The sword “al-Azb” was famous for its sharp edges and cutting ability, and it was used by the Prophet (SAW) during the battles of Badr and Uhud. In the context of the Pakistan Army’s military operation in 2014, the term “Zarb-e-Azb” relates to a sharp strike against terrorism.
Study of life in outer space is known as:
- (A) Endobiology
- (B) Exobiology
- (C) Enterobiology
- (D) Neobiology
- (B) Exobiology
Exobiology is the branch of biology specifically concerned with the search for and study of life in outer space, including other planets and celestial bodies. Coined by Nobel Prize winner Joshua Lederberg, the term is often used interchangeably with astrobiology, though exobiology sometimes refers more specifically to the search for life external to Earth. It integrates astronomy, biology, and geology to investigate the origin, evolution, and distribution of life in the universe.
(A) Endobiology – the study of life within a particular environment or living organisms.
(B) Exobiology – the study of life outside the Earth, also called astrobiology; the search for life outside the Earth.
(C) Enterobiology – the study of the intestines and the digestive tract.
(D) Neobiology – the study of new forms of life. Here, the prefix “neo” means new, and it’s not commonly used in biology.
Which of the following studies deals with the interactions among organisms and their environment?
- (A) Archaeology
- (B) Anthropology
- (C) Ecology
- (D) Genetics
- (C) Ecology
Ecology is the scientific study of the relationships and interactions between living organisms and their biophysical environment.
- (A) Archaeology: The study of the history of human beings in the ancient period, based on the excavation of artifacts, fossils, and other related objects.
- (B) Anthropology: The science of human beings, including the origin of human beings, how we have evolved, and how we behave as societies.
- (C) Ecology: Studying the interaction of living things with their environment and with other living things.
- (D) Genetics: The science of genes and heredity.
Wakhan Corridor is located to the _______ of Pakistan.
- (A) West
- (B) East
- (C) North
- (D) South-West
- (C) North
Wakhan Corridor is located to the NORTH of Pakistan. The strip of Afghan territory is situated just above the Gilgit-Baltistan territory of Pakistan, keeping Tajikistan at bay and heading towards China. The Wakhan Corridor has historically acted as a buffer between the Hindu Kush and the Pamir mountain ranges.