Prepare with MCQs
Thousands of verified questions for competitive exams
25K+
MCQs
15+
Categories
500+
Tests
Free
Access
All
๐ General Knowledge
๐ Current Affairs
๐ต๐ฐ Pakistan Affairs
โช Islamic Studies
๐ค English
๐ป Computer
๐งฎ Mathematics
โ Physics
๐งช Chemistry
๐งฌ Biology
๐ฌ Everyday Science
๐ฉโ๐ซ Pedagogy
ุงุฑุฏู Urdu
๐บ World Geography
๐ History
Biology
Which organelle, found only in plant and algal cells, is responsible for providing structural strength and preventing the cell from bursting due to osmotic pressure?
A
Plasma membrane
B
Vacuole
C
Cell wall
D
Chloroplast
Correct Answer
C
Biology
In the human respiratory system, where does the actual exchange of gases (oxygen and carbon dioxide) take place?
A
Bronchioles
B
Alveoli
C
Trachea
D
Pharynx
Correct Answer
B
Biology
Which level of an ecosystem represents organisms that can produce their own food from inorganic substances using light or chemical energy?
A
Primary consumers
B
Decomposers
C
Primary producers
D
Secondary consumers
Correct Answer
C
Biology
What name is given to the specific region of an enzyme where substrate molecules bind and undergo a chemical reaction?
A
Allosteric site
B
Active site
C
Catalyst zone
D
Inhibitor site
Correct Answer
D
Biology
What is the name of the theory that describes how life changes over time through natural selection, famously proposed by Charles Darwin?
A
Cell Theory
B
Gene Theory
C
Theory of Evolution
D
Germ Theory of Disease
Correct Answer
C
Biology
Which of the following organisms belongs to the Kingdom Fungi?
A
Amoeba
B
Mushroom
C
Cyanobacteria
D
Spirogyra
Correct Answer
B
Biology
Which plant hormone is primarily responsible for fruit ripening?
A
Auxin
B
Gibberellin
C
Ethylene
D
Abscisic acid
Correct Answer
C
Biology
What is the basic structural and functional unit of the human kidney?
A
Nephron
B
Neuron
C
Alveolus
D
Osteon
Correct Answer
A
Biology
Which macromolecule is primarily responsible for storing and transmitting genetic information?
A
Carbohydrates
B
Lipids
C
Proteins
D
Nucleic acids
Correct Answer
D
Biology
What is the main function of red blood cells in the human body?
A
To fight infections
B
To clot blood at injury sites
C
To transport oxygen to tissues
D
To produce hormones
Correct Answer
C