PMS · PMS · 2026
Solved PMS 2026 GK Biological Science Mock Test — 50 MCQs with verified answers and explanations (cell biology, biomolecules, enzymes, plant and animal life, human body, diseases and vitamins). A Sir Adnan mock test for PMS Screening preparation, not an official past paper.
Paper Snapshot
Questions
50
Time
50
Minutes
Subjects
1
Topics
10
Read mode shows correct answers. Attempt mode hides answers, starts timer, and shows your result after submission.
About this paper
A Sir Adnan mock test headed 'PMS GK Biological Science Mock Test / MCQs-100 (ANSWER KEY IN END)' from the monster-data 'PMS SCREENING 2026 GK UPDATED' pack. The booklet prints only 50 items (Q1–50) with a 50-entry key, so 50 are published here in the standard MCQ format with verified answers and explanations; the source prints options with an answer key at the end, so optionsSource is recorded as 'printed'. All 50 keyed answers agree with the standard fact, so nothing was dropped or corrected.
Paper Controls
Subject 1
Topic Section
10 solved MCQs shown directly below
Correct Answer: Cell
The cell is the basic structural and functional unit of life; all living things are made of cells.
Correct Answer: Mitochondria
Mitochondria generate most of the cell's ATP, the energy currency of the cell.
Correct Answer: Robert Brown
Robert Brown described the nucleus in plant cells in 1831 (Robert Hooke had coined 'cell' in 1665).
Correct Answer: Cytosol
The cytosol is the fluid matrix of the cytoplasm in which the organelles are suspended.
Correct Answer: Nucleus
Prokaryotic cells have no membrane-bound nucleus; their DNA lies free in the cytoplasm.
Correct Answer: DNA and protein
Chromosomes consist of DNA wound around histone proteins (chromatin).
Correct Answer: Mitochondria
The mitochondrion is called the powerhouse of the cell because it produces ATP by respiration.
Correct Answer: Lipids & proteins
The cell membrane is a phospholipid bilayer with embedded proteins (fluid mosaic model).
Correct Answer: Digestive enzymes
Lysosomes contain hydrolytic (digestive) enzymes that break down waste and foreign material.
Correct Answer: Protein synthesis
Ribosomes are the sites of protein synthesis, translating mRNA into polypeptide chains.
Topic Section
7 solved MCQs shown directly below
Correct Answer: Amino acids
Proteins are polymers of amino acids joined by peptide bonds.
Correct Answer: Energy supply
Carbohydrates are the body's main quick energy source (glucose, glycogen, starch).
Correct Answer: Water
Lipids are hydrophobic: insoluble in water but soluble in organic solvents such as ether and chloroform.
Correct Answer: 9
Fats provide about 9 kcal per gram, versus about 4 kcal per gram for proteins and carbohydrates.
Correct Answer: Liver & muscles
Glycogen, the storage form of glucose, is stored mainly in the liver and in skeletal muscle.
Correct Answer: Uracil
RNA contains uracil in place of thymine, and ribose in place of deoxyribose.
Correct Answer: Nucleotide
Nucleic acids (DNA and RNA) are polymers of nucleotide monomers.
Topic Section
3 solved MCQs shown directly below
Correct Answer: Proteins
Most enzymes are proteins (a few catalytic RNAs, ribozymes, are the exception).
Correct Answer: Substrate
An enzyme's active site binds its substrate, forming an enzyme–substrate complex.
Correct Answer: Acidic
Pepsin works best in the stomach's acidic conditions, at about pH 1.5–2.
Topic Section
5 solved MCQs shown directly below
Correct Answer: Chloroplast
Photosynthesis takes place in chloroplasts, using the pigment chlorophyll.
Correct Answer: Stomata
Transpiration — water loss as vapour — occurs mainly through the stomata of leaves.
Correct Answer: Water & minerals
Xylem conducts water and dissolved minerals upward from the roots.
Correct Answer: Food
Phloem transports food (mainly sucrose) from leaves to other parts of the plant.
Correct Answer: Anther to stigma
Pollination is the transfer of pollen from the anther to the stigma of a flower.
Topic Section
1 solved MCQs shown directly below
Correct Answer: Entomology
Entomology is the study of insects.
Topic Section
3 solved MCQs shown directly below
Correct Answer: Homeotherms
Warm-blooded animals, which keep a constant body temperature, are homeotherms.
Correct Answer: Both land & water
Amphibians live both on land and in water (their name means 'double life').
Correct Answer: Mammary glands
Mammals are characterised by mammary glands, hair, and giving birth to live young (mostly).
Topic Section
11 solved MCQs shown directly below
Correct Answer: Skin
The skin is the largest organ of the human body by area and weight.
Correct Answer: 4
The human heart has four chambers: two atria and two ventricles.
Correct Answer: 37°C
Normal human body temperature is about 37°C (98.6°F).
Correct Answer: Pancreas
Insulin is secreted by the beta cells of the islets of Langerhans in the pancreas.
Correct Answer: Oxygen transport
Haemoglobin in red blood cells carries oxygen from the lungs to the tissues.
Correct Answer: Kidney
The kidneys are the main excretory organs, filtering blood and forming urine.
Correct Answer: Liver
The liver is the largest gland in the human body (and the largest internal organ).
Correct Answer: Nervous system
Neurons are the nerve cells of the nervous system, transmitting electrical impulses.
Correct Answer: Nephron
The nephron is the functional unit of the kidney.
Correct Answer: Blood clotting
Platelets (thrombocytes) initiate blood clotting at a wound.
Correct Answer: Skull
The brain is protected by the skull (cranium) and the meninges.
Topic Section
5 solved MCQs shown directly below
Correct Answer: Lungs
Tuberculosis, caused by Mycobacterium tuberculosis, affects mainly the lungs.
Correct Answer: Protozoa
Malaria is caused by Plasmodium, a protozoan parasite transmitted by Anopheles mosquitoes.
Correct Answer: Aedes mosquito
Dengue is transmitted by Aedes mosquitoes, chiefly Aedes aegypti.
Correct Answer: Bacteria
Antibiotics act against bacteria; they are ineffective against viruses.
Correct Answer: Liver
Hepatitis is inflammation of the liver, caused by hepatitis viruses and other agents.
Topic Section
3 solved MCQs shown directly below
Correct Answer: Scurvy
Vitamin C deficiency causes scurvy (bleeding gums, weak connective tissue).
Correct Answer: Calcium
Vitamin D promotes absorption of calcium (and phosphate) from the intestine for bones.
Correct Answer: Vitamin A
Night blindness (nyctalopia) is caused by vitamin A deficiency.
Topic Section
2 solved MCQs shown directly below
Correct Answer: Viral disease
Polio is a viral disease, so its vaccine prevents a viral infection.
Correct Answer: Artificial active
Vaccination produces artificial active immunity: the body makes its own antibodies after exposure to the vaccine antigen.
Source & verification
Built by GK360 from verified bank questions — every answer rechecked before publishing.
Questions
No. It is a Sir Adnan mock test headed 'PMS GK Biological Science Mock Test', prepared for PMS Screening 2026. It is published as paperType 'mock', never as a past paper, and the year 2026 is the booklet's mock label, not a claimed exam session.
The booklet prints only 50 items (Q1–50) and its answer key lists only 50 entries. The header's '100' is a count-claim error, recorded in the file; nothing was invented to fill the missing 50.
No. Every printed item's keyed answer was checked against the standard fact and all 50 check out, with no duplicate options and no corrections.
Biological science only, in five sections: cell biology (1–10), biomolecules and enzymes (11–20), plant and animal life (21–30), the human body and organs (31–40), and diseases, vitamins and vaccines (41–50).
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