CSS · Federal Public Service Commission · 2026
Solved CSS MPT Everyday Science practice set from the 1000 Advanced Booklet, Q251–300 — 50 MCQs with verified answers and explanations (hormones, brain and nerves, kidney, muscles and bones, blood and organs, eye and vision). A practice compilation, not a past paper.
Paper Snapshot
Questions
50
Time
50
Minutes
Subjects
1
Topics
8
Read mode shows correct answers. Attempt mode hides answers, starts timer, and shows your result after submission.
About this paper
Part 6 (Q251–300) of the Sir Adnan '1000 Advanced Booklet Everyday Science' one-liner compilation (monster-data 'CSS MPT PAST PAPERS' pack). The booklet prints statement + answer only, so each item is published in the standard MCQ format with 3 authored plausible distractors under Anas's 2026-10-28 single-format decision and optionsSource recorded as 'authored'. All 50 printed items are published with no drops and no corrections. Two NOTE flags: Q278 (hair as 'fastest growing tissue' is the conventional one-liner; strictly hair is a keratinised structure, not a tissue) and Q279 (tooth enamel does not grow or regenerate once formed, so 'slowest growing' is the booklet's conventional phrasing). This is a practice set, never titled as a past paper, and Q301–1000 remain for later runs.
Paper Controls
Subject 1
Topic Section
6 solved MCQs shown directly below
Correct Answer: Melatonin
Melatonin, secreted by the pineal gland, regulates the sleep-wake cycle (circadian rhythm).
Correct Answer: Estrogen
Estrogen, produced mainly by the ovaries, develops female secondary sexual characters such as breast development and widening of the hips.
Correct Answer: Testosterone
Testosterone, produced mainly by the testes, develops male secondary sexual characters such as facial hair and deepening of the voice.
Correct Answer: Thyroid gland
Thyroxine (T4), the main thyroid hormone regulating metabolism, is secreted by the thyroid gland.
Correct Answer: Thyroid gland
Calcitonin, which lowers blood calcium levels, is secreted by the parafollicular (C) cells of the thyroid gland.
Correct Answer: Parathyroid gland
Parathormone (parathyroid hormone, PTH), which raises blood calcium levels, is secreted by the parathyroid glands.
Topic Section
5 solved MCQs shown directly below
Correct Answer: 1.3–1.4 kg
The average adult human brain weighs about 1.3–1.4 kg, roughly 2% of body weight.
Correct Answer: Cerebrum
The cerebrum, the two large hemispheres of the forebrain, is the largest part of the human brain and handles thought, memory and voluntary movement.
Correct Answer: Cerebellum
The cerebellum, at the back of the brain below the cerebrum, coordinates balance, posture and fine movement.
Correct Answer: Medulla Oblongata
The medulla oblongata, the lowest part of the brainstem, controls involuntary actions including heartbeat, breathing and swallowing.
Correct Answer: 3
The brain (and spinal cord) is covered by three meninges: the dura mater, the arachnoid mater and the pia mater.
Topic Section
5 solved MCQs shown directly below
Correct Answer: Vision
The optic nerve (cranial nerve II) carries visual signals from the retina to the brain.
Correct Answer: Hearing
The auditory (vestibulocochlear) nerve carries sound signals from the inner ear to the brain.
Correct Answer: Smell
The olfactory nerve (cranial nerve I) carries smell signals from the nose to the brain.
Correct Answer: Taste
The gustatory sense is the sense of taste, detected by taste buds on the tongue.
Correct Answer: Skin
The skin, which carries touch, temperature and pain receptors over the whole body, is the largest sense organ.
Topic Section
2 solved MCQs shown directly below
Correct Answer: Nephron
The nephron, each kidney containing about a million of them, is the functional unit of the kidney that filters blood and forms urine.
Correct Answer: 180 liters
The kidneys filter about 180 litres of blood plasma per day (a glomerular filtration rate of about 125 ml per minute); most of it is reabsorbed, leaving 1–2 litres of urine.
Topic Section
7 solved MCQs shown directly below
Correct Answer: 32
A normal adult has 32 permanent teeth: 16 in each jaw, including 4 wisdom teeth.
Correct Answer: Tooth enamel
Tooth enamel, the outer covering of teeth, is the hardest substance in the human body, harder than bone.
Correct Answer: Stapedius (ear)
The stapedius, a tiny muscle of the middle ear about 1 mm long, is the smallest muscle in the human body.
Correct Answer: Gluteus Maximus
The gluteus maximus, the main buttock muscle, is the largest muscle in the human body by bulk.
Correct Answer: Masseter (jaw muscle)
The masseter, the jaw-closing muscle, is the strongest muscle by force exerted: it can generate the greatest bite force of any muscle.
Correct Answer: Femur
The femur, the thigh bone, is the longest bone in the human body.
Correct Answer: Stapes
The stapes, one of the three tiny ossicles of the middle ear, is the shortest (smallest) bone in the human body.
Topic Section
5 solved MCQs shown directly below
Correct Answer: Ovum (female egg cell)
The ovum, the female egg cell at about 0.1 mm across, is the largest cell in the human body.
Correct Answer: Sperm cell
The sperm cell is the conventional one-liner answer for the smallest cell in the human body.
Correct Answer: Hair
Hair is the booklet's conventional one-liner answer for the fastest growing tissue of the human body.
Correct Answer: Tooth enamel
Tooth enamel is the booklet's conventional one-liner answer for the slowest growing tissue of the human body.
Correct Answer: 280 days (9 months)
Normal human pregnancy lasts about 280 days, or 40 weeks (9 months), counted from the last menstrual period.
Topic Section
10 solved MCQs shown directly below
Correct Answer: Red blood cells
Red blood cells, through the hemoglobin they contain, carry oxygen from the lungs to the body's tissues.
Correct Answer: White blood cells
White blood cells (leukocytes) defend the body against infection by engulfing microbes and producing antibodies.
Correct Answer: Platelets
Platelets (thrombocytes) are cell fragments that clump at a wound and trigger blood clotting.
Correct Answer: Liver
Bile is produced by the liver and aids the digestion of fats in the small intestine.
Correct Answer: Gallbladder
The gallbladder stores bile produced by the liver and releases it into the small intestine after meals.
Correct Answer: Spleen
The spleen is called the graveyard of red blood cells because it removes old and damaged red cells from the blood.
Correct Answer: Spleen
The spleen is called the blood bank of the body because it stores blood and releases it into circulation when needed.
Correct Answer: Kidney
The kidney purifies blood by filtering out waste products and excess water, which leave the body as urine.
Correct Answer: Liver
The liver is called the chemical factory of the body because it carries out hundreds of metabolic and detoxification reactions.
Correct Answer: Pituitary gland
The pituitary gland is called the master of the endocrine system because its hormones control several other endocrine glands.
Topic Section
10 solved MCQs shown directly below
Correct Answer: Iris
The iris, the coloured part of the eye, adjusts the size of the pupil and so controls how much light enters the eye.
Correct Answer: Cornea
The cornea is the clear, transparent front layer of the eye that focuses incoming light.
Correct Answer: Rods & Cones
The retina contains two kinds of light-sensitive cells: rods, for dim-light vision, and cones, for colour and detail vision.
Correct Answer: Eye
Vitamin A deficiency first affects the eye, causing night blindness and, if untreated, damage to the cornea (xerophthalmia).
Correct Answer: Cones of retina
Colour blindness is usually due to a defect in the cones of the retina, the cells that detect colour.
Correct Answer: Vitamin A
Night blindness is caused by lack of vitamin A, which is needed to make rhodopsin, the light-sensitive pigment of the rods.
Correct Answer: Eye (lens opacity)
A cataract is a clouding (opacity) of the lens of the eye, which blurs vision.
Correct Answer: Short-sightedness
Myopia is short-sightedness: distant objects appear blurred because the eye focuses light in front of the retina.
Correct Answer: Long-sightedness
Hypermetropia is long-sightedness: near objects appear blurred because the eye focuses light behind the retina.
Correct Answer: Concave lens
Myopia is corrected with a concave (diverging) lens, which spreads light rays so they focus on the retina.
Source & verification
Built by GK360 from verified bank questions — every answer rechecked before publishing. Where the source printed no options, the answer options were prepared by GK360; the questions and correct answers are the verified originals.
Questions
No. This is a practice set built from the Sir Adnan '1000 Advanced Booklet Everyday Science' one-liner compilation. It is labelled practice in the title, slug and paperType and must not be quoted as an official past paper.
Every item in Q251–300 has a verifiable standard answer (hormones, brain and nerves, kidney, muscles and bones, blood and organs, eye and vision). Nothing had to be dropped as unanswerable and no booklet answer needed correction; two items carry NOTE flags about the booklet's conventional phrasing.
The source prints statement + answer only, with no (a)-(d) options. Under Anas's 2026-10-28 single-format decision, each item is published in the standard MCQ format with 3 authored plausible distractors; the questions and answers are the booklet's, and every answer was verified as the standard answer. optionsSource is recorded as 'authored' so authored options are never mistaken for the paper's.
Q251–300 cover hormones and the endocrine system, the brain and nervous system, nerves and senses, the kidney, teeth, muscles and bones, cells and growth, blood and body organs, and the eye and vision. The booklet runs to 1000 items; Q301–1000 are held for later conversion runs in the same format.
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