Main Subjects
Main Subjects MCQs With Answers
0 Main Subjects MCQs for CSS, PPSC, FPSC, NTS and entry-test preparation. Take a scored quiz instead →
Computer (595)
Current Affairs (1696)
English (1530)
Everyday Science (741)
General Knowledge (1134)
Islamic Studies (1113)
Mathematics (1624)
Pakistan Studies (941)
What term describes the natural process by which certain bacteria convert atmospheric nitrogen gas into compounds that plants can absorb and use?
ANitrogen fixation
BPhotosynthesis
CFermentation
DRespiration
Animals are broadly classified as vertebrates or invertebrates based on which characteristic?
AWhether they can fly
BWhether they possess a backbone
CWhether they are warm-blooded or cold-blooded
DWhether they live on land or in water
Blood plasma, the liquid component of blood, primarily serves what function?
ADirectly transporting oxygen through hemoglobin
BClotting wounds on its own
CCarrying blood cells, nutrients, hormones, and waste products throughout the body
DProducing new blood cells
Alkali metals, found in the first group of the periodic table, are generally known for what characteristic?
AExisting only as gases at room temperature
BBeing highly reactive, especially with water
CBeing extremely unreactive and stable
DBeing commonly used as insulators
What term describes animals, such as reptiles, whose internal body temperature largely depends on their external environment rather than being internally regulated?
ACold-blooded, or ectothermic, animals
BHibernating animals only
CNocturnal animals only
DWarm-blooded, or endothermic, animals
Where in the human body are most blood cells primarily produced?
AIn the bone marrow
BIn the lungs
CIn the stomach
DIn the liver exclusively
Halogens, a reactive group of non-metal elements including chlorine, fluorine, and iodine, are found in which part of the periodic table?
AThe group second from the right
BThe very top row only
CThe leftmost group
DThe middle transition metal block
Amphibians, such as frogs, are characterized by which typical life cycle pattern?
ASpending their entire life exclusively underwater
BLiving exclusively in extremely cold climates
CNever requiring any water at any life stage
DTypically beginning life in water and later transitioning to also live on land
How does vaccination generally help protect a person against a specific disease in the future?
ABy training the immune system to recognize and respond quickly to a specific pathogen without causing the actual disease
BBy permanently curing all existing infections in the body
CBy directly killing pathogens already present in the bloodstream
DBy eliminating the need for the immune system entirely
Fluoride is commonly added to toothpaste and some water supplies primarily for what health benefit?
ATo whiten teeth instantly
BTo reduce blood pressure
CTo help prevent tooth decay by strengthening tooth enamel
DTo improve digestion