Civil Superior Services — Complete MCQ Bank
CSS is Pakistan’s premier federal competitive examination. Strong preparation requires conceptual clarity, broad general knowledge and consistent practice across compulsory and optional areas.
Which organ system includes the lungs and is responsible for gas exchange?
What is the term for the sum of all chemical reactions occurring within an organism?
Which plant hormone is primarily responsible for stem elongation and phototropism?
What is the term for the group of hormone-secreting glands in the body?
Which molecule is the primary source of energy for most cellular activities?
What is the term for the process by which plants make their own food using light energy?
Which structure connects muscles to bones in the human body?
What is the term for a substance that speeds up chemical reactions in living organisms?
Which part of the digestive system primarily absorbs nutrients into the bloodstream?
What is the term for the process by which cells divide to form gametes?