Biology MCQ (Multiple Choice Questions) - SchoolingAxis

Biology MCQ (Multiple Choice Questions)

 Que- Study of human population and things that affect them is 

a. Ecology 

b. Demography 

c. Demology 

d. Environment study 


Answer- Demography


Que- Rate of population growth in 1980s was 

a. 0.1 

b. 0.01 

c. 0.02 

d. 0.15 


Answer- 0.02


Que- Replantation of plants in the areas where they were present earlier is called 

a. Deforestation 

b. Aforestation 

c. Forestation 

d. Reforestation 


Answer- Reforestation


Que- Establishment of new forests where no forests existed previously is called 

a. Reforestation 

b. Forestation 

c. Neofrestation 

d. Aforestation 


Answer- Aforestation


Que- Which is environmental buffer? 

a. Mountains 

b. Deserts 

c. Forests 

d. Oceans 


Answer- Forests


Que- About half of the rain which falls in tropical forests comes from 

a. High winds 

b. Cold surroundings 

c. Transpiration of plants 

d. Surrounding seas 


Answer- Transpiration of plants


Que- Biodiversity is 

a. Total number of species in a community 

b. Total number of species in an ecosystem 

c. Total number of genus in an ecosystem 

d. None of these 


Answer- Total number of species in an ecosystem


Que- Which statement is not true about ozone? 

a. Bluish 

b. Explosive 

c. 10-50 km 

d. O2 


Answer- O2


Que- Ozone depletion is commonly caused by 

a. CFCs 

b. Industrial smoke 

c. Heavy nitrogen gasses 

d. Carbon dioxide 


Answer- CFCs


Que- Diseases caused by UV rays in humans 

a. Skin cancers 

b. Cataracts 

c. Night blindness 

d. Both a and b 


Answer- Both a and b


Que- Which gas commonly causes green house effect? 

a. Hydrogen sulphide 

b. Carbon dioxide 

c. Nitrogen gas 

d. Carbon monoxide 


Answer- Carbon dioxide


Que- Causes of green house effect are 

a. Over urbanization 

b. Deforestation 

c. Industrialization 

d. All of these 


Answer- All of these


Que- Sun rays are reradiated from the earth's surface in the form of 

a. Long wave radiations 

b. Short wave radiations 

c. Radiowaves 

d. Medium waves 


Answer- Long wave radiations


Que- Incomplete burning of carbon compounds cause release of 

a. Carbon dioxide 

b. Carbon monoxide 

c. Oxides of nitrogen 

d. CFCs 


Answer- Carbon monoxide


Que- Acid rain is caused by 

a. Sulphur dioxide 

b. Oxides of nitrogen 

c. Both a and b 

d. None of these 


Answer- Both a and b


Que- Algal bloom is also called as 

a. Deforestation 

b. Eutrophication 

c. Neotrophication 

d. Lichen 


Answer- Eutrophication


Que- The chemical wastes from industry is called 

a. Industrial litter 

b. Industrial trash 

c. Industrial effluents 

d. Industrial deffluents 


Answer- Industrial effluents


Que- Pesticides and fertilizers are also called 

a. Pestochemicals 

b. Industrochemicals 

c. Killing chemicals 

d. Agrochemicals 


Answer- Agrochemicals


Que- Which are more susceptible to attacks of pests? 

a. Multicultures 

b. Monocultures 

c. Dicultures 

d. Polycultures 


Answer- Monocultures


Que- Which disease does not match its etiology? 

a. Kwashiorkor is a nutritional deficiency 

b. Alzheimer is a mental illness 

c. Cretinism is due to hormonal imbalance 

d. Cholera is physical disorder 


Answer- Cholera is physical disorder


Que- Detergents usually release 

a. Carbonates 

b. Sulphates 

c. Phosphates 

d. Nitrates 


Answer- Phosphates


Que- Diphtheria is 

a. Genetic disease 

b. Pathogenic disease 

c. Metabolic disease 

d. Nutritional disease 


Answer- Pathogenic disease


Que- Which one the following is not nutritional disease? 

a. Scurvy 

b. Anemia 

c. Goiter 

d. Diabetes 


Answer- Diabetes


Que- Unbroken series of organisms arranged from ancestor to descendant sequence is 

a. Biodiversity 

b. Phyletic lineage 

c. Connecting link 

d. Evolutionary line 


Answer- Phyletic lineage


Que- Control of organisms by using living organisms is called 

a. Bioremediation 

b. Integrated disease management 

c. Antisepsis 

d. Biological control 


Answer- Biological control


Que- Branch of biology which deals with the study of chemical components and chemical processes in living organisms is called 

a. Molecular biology 

b. Physiology 

c. Biochemistry 

d. Atomic biology 


Answer- Biochemistry


Que- _______ is the potential surce of chemical energy for cellular activities 

a. C-H bond 

b. C-O bond 

c. C-N bond 

d. P-O-C bond 


Answer- C-H bond


Que- Percentage of water in brain cells is 

a. 0.2 

b. 0.65 

c. 0.85 

d. 0.89 


Answer- 0.85


Que- Breakdown of large molecules into smaller ones utilizing water molecules is 

a. Hydration 

b. Hydrolysis 

c. Dehydration synthesis 

d. Electrolysis 


Answer- Hydrolysis


Que- A chemical substance that reacts with enzyme but is not transformed into product and thus blocking active site is called 

a. Substrate 

b. Co-factor 

c. Inhibitor 

d. Promotor 


Answer- Inhibitor


Que- Intake of liquid material by cell membrane is called 

a. Endocytosis 

b. Exocytosis 

c. Phagocytosis 

d. Pinocytosis 


Answer- Pinocytosis


Que- Ribosomes were discovered by 

a. Golgi 

b. De Duve 

c. Palade 

d. R.Brown 


Answer- Palade


Que- _______ is concerned with cell secretions 

a. Endoplasmic reticulum 

b. Golgi complex 

c. Lysosomes 

d. Cell membrane 


Answer- Golgi complex


Que- Cytoskeleton involved in assembly and disassembly of the spindle during mitosis is of 

a. Microtubules 

b. Microfilaments 

c. Intermediate filaments 

d. None of these 


Answer- Microtubules


Que- Reverse transcriptase is present in 

a. All RNA viruses 

b. All DNA viruses 

c. All retroviruses 

d. All viruses 


Answer- All retroviruses


Que- Pox viruses are 

a. RNA non-enveloped 

b. RNA enveloped 

c. DNA non-enveloped 

d. DNA enveloped 


Answer- DNA enveloped


Que- Bacteria which grow either in the presence or absence of oxygen 

a. Aerobic bacteria 

b. Anaerobic bacteria 

c. Facultative bacteria 

d. Microaerophilic 


Answer- Facultative bacteria


Que- Destruction of all life forms is called 

a. Sterilization 

b. Disinfection 

c. Antisepsis 

d. Preservation 


Answer- Sterilization


Que- _______ is used to relieve one kind of headache, migraine 

a. Pencillin 

b. Lovastatin 

c. Cyclosporine 

d. Ergotin 


Answer- Ergotin


Que- The single healthy megaspore retained within the megasporangium germinates to form an egg containing female gaemtophyte called 

a. Ovule 

b. Seed 

c. Fruit 

d. Embroyo sac 


Answer- Embroyo sac


Que- Pollen grains in pinus have _____ for dispersal through wind 

a. Flagella 

b. Cilia 

c. Wings 

d. Feathers 


Answer- Wings


Que- Double fertilization is feature of 

a. Ferns 

b. Whisk ferns 

c. Gymnosperms 

d. Angiosperms 


Answer- Angiosperms


Que- Alternation of generations is absent in 

a. Hydration 

b. Obelia 

c. Jelly fish 

d. Physalia 


Answer- Hydration


Que- Enterobius vermicularis is commonly known as 

a. Flatworm 

b. Pinworm 

c. Hook worm 

d. Tapeworm 


Answer- Pinworm


Que- Animals of which class of arthropoda are present everywhere 

a. Crustacean 

b. Insecta 

c. Arachnida 

d. Myriapoda 


Answer- Insecta


Que- Amphibians are considered to be evolved from 

a. Newts 

b. Varanope 

c. Dipnoi 

d. Hagfishes 


Answer- Dipnoi


Que- Red to orange pigments are 

a. Carotenes 

b. Carotenoids 

c. Xanthophylls 

d. Chlorophyll 


Answer- Carotenes


Que- NADH is oxidized by 

a. Coenzyme ? 

b. Cytochrome b 

c. Oxygen 

d. Glycolysis 


Answer- Coenzyme ?


Que- Salivary glands present in front of ear are 

a. Sublingual 

b. Submaxillary 

c. Submandibular 

d. Parotid 


Answer- Parotid


Que- If bile pigments are prevented from leaving digestive tract, then they cause 

a. Hepatitis 

b. Jaundice 

c. Gall stones 

d. Blockage 


Answer- Jaundice


Que- How many spiracles are present in cockroach 

a. 5.0 

b. 10.0 

c. 20.0 

d. 40.0 


Answer- 20.0


Que- Gaseous exchange in birds occurs at level of 

a. Alveoli 

b. Air sacs 

c. Bronchi 

d. Parabronchi 


Answer- Parabronchi


Que- An infectious disorder of respiratory system is 

a. Cancer 

b. Asthma 

c. Tuberculosis 

d. Emphysema 


Answer- Tuberculosis


Que- According to cohesion-tension theory, tension is created by 

a. Hydrogen bonding 

b. Transpiration 

c. Adhesion 

d. Root prerssure 


Answer- Transpiration


Que- Cuticular transpiration is _______ of total transpiration 

a. 1-2% 

b. 3-4% 

c. 5-7% 

d. 0.9 


Answer- 5-7%


Que- _______ cells of phloem are directly involved in transport of organic solutes 

a. Parenchyma 

b. Companion cell 

c. Tracheid 

d. Sieve element 


Answer- Sieve element


Que- Deoxygenated blood first enters in _____ part in fishes 

a. Sinus venosus 

b. Right atrium 

c. Left atrium 

d. Conus arteriosus 


Answer- Sinus venosus


Que- 95% of the cytoplasm of RBCs is 

a. Hemoglobin 

b. Enzymes 

c. Salts 

d. Other proteins 


Answer- Hemoglobin


Que- lubb sound is produced due to 

a. Opening of inlet valve 

b. Closure of inlet valve 

c. Opening of outlet valve 

d. Closure of outlet valve 


Answer- Closure of inlet valve


Que- An antibody is made of _____ polypeptide chains 

a. 1.0 

b. 2.0 

c. 3.0 

d. 4.0 


Answer- 4.0


Que- _______ of earth surface is covered with water 

a. 0.1 

b. 0.3 

c. 0.75 

d. 0.9 


Answer- 0.75


Que- Ozone depletion occurs commonly due to 

a. Carbon dioxide 

b. Chlorofluorocarbons 

c. UV rays 

d. Deforestation 


Answer- Chlorofluorocarbons


Que- The productivity of aquatic ecosystem is basically determined by light and 

a. CO2 

b. O2 

c. Water 

d. Nutrients 


Answer- Nutrients


Que- Ecosystem not found in Pakistan is 

a. Tropical rain forest 

b. Temperate deciduous forest 

c. Grassland 

d. Tundra 


Answer- Tropical rain forest


Que- Annual rainfall in grassland is about 

a. More than 2500 mm 

b. 750-1500 mm 

c. 250-750 mm 

d. Less than 250 mm 


Answer- 250-750 mm


Que- Which of the following is most constant abiotic component of ecosystem 

a. Air 

b. Water 

c. Land 

d. Gravity 


Answer- Gravity


Que- Conversion of ammonia or ammonium ion into nitrites during nitrogen cycle occurs due to 

a. Rhizobium 

b. Nitrosomonas 

c. Nitrobacter 

d. Pseudomonas 


Answer- Nitrosomonas


Que- _______ supported theory of special creation 

a. Linnaeus 

b. Aristotle 

c. Mendel 

d. Lamarck 


Answer- Linnaeus


Que- In Hardy-Weinberg formula P2 represents frequency of 

a. Recessive allele 

b. Dominant allele 

c. Homozygous dominant individual 

d. Homozygous recessive individual 


Answer- Homozygous dominant individual


Que- Humming bird is an example of 

a. Cold blooded animal 

b. Ectotherm 

c. Endotherm 

d. Heterotherm 


Answer- Heterotherm


Que- In condition of high temperature, following does not occur or occurs at low level 

a. Vasodilation 

b. Activation of sweat glands 

c. Thermogenesis 

d. Evaporative cooling 


Answer- Thermogenesis


Que- Sapwood is formed from 

a. Primary xylem 

b. Secondary xylem 

c. Primary phloem 

d. Secondary phloem 


Answer- Secondary xylem


Que- Number of cervical vertebrae is 

a. 5.0 

b. 7.0 

c. 9.0 

d. 12.0 


Answer- 7.0


Que- Joints present in skull are example of 

a. Fibrous joints 

b. Cartilaginous joints 

c. Synovial Joints 

d. Slightly moveable joints 


Answer- Fibrous joints


Que- Only myosine is present in 

a. A band 

b. 1 band 

c. H zone 

d. Sarcomere 


Answer- H zone


Que- __________ is a nervous disorder characterized by involuntary tremors, diminished motor power and rigidity. 

a. Epilepsy 

b. Meningitis 

c. Alzheimer's disease 

d. Parkinson's disease 


Answer- Parkinson's disease


Que- Which of the following hormone is polypeptide in nature 

a. Insulin 

b. Thyroxine 

c. ADH 

d. Cortisone 


Answer- ADH


Que- Secretin inhibits production of 

a. Gastric juice 

b. Pancreatic juice 

c. Bile 

d. All of these 


Answer- Gastric juice


Que- Highest form of learning is 

a. Latent learning 

b. Insight learning 

c. Operant conditioning 

d. Instinct 


Answer- Insight learning


Que- Far-red light promotes flowering in 

a. Short day plant 

b. Long day plant 

c. Day neutral plant 

d. None of these 


Answer- Short day plant


Que- In human female, fertilization commonly occurs at 

a. Proximal part of oviduct 

b. Distal part of oviduct 

c. Uterus 

d. Cervix 


Answer- Proximal part of oviduct


Que- Yellowish glandular structure which produces progesterone is 

a. Graffian follicle 

b. Ovary 

c. Corpus luteum 

d. Placenta 


Answer- Corpus luteum


Que- Yellow cytoplasm in ascidian gives rise to 

a. Epidermis 

b. Muscle cells 

c. Gut 

d. Notochord 


Answer- Muscle cells


Que- Embryonic induction is caused by part developing from 

a. Endoderm 

b. Ectoderm 

c. Mesoderm 

d. Extraembryonic layers 


Answer- Mesoderm


Que- Okazaki fragments are connected together through action of 

a. Primase 

b. Polymerase 

c. Helicase 

d. Ligase 


Answer- Ligase


Que- Sickle cell anemia is an example of 

a. Chromosomal aberration 

b. Insertion of gene 

c. Deletion of gene 

d. Point mutation 


Answer- Point mutation


Que- Which of the following is an autosomal disorder 

a. Down's syndrome 

b. Klinifelter's syndrome 

c. Turner's syndrome 

d. Jacob's syndrome 


Answer- Down's syndrome


Que- Test cross is used to find 

a. Trait 

b. Phenotype 

c. Genotype 

d. Ratios 


Answer- Genotype


Que- An example of codominance is 

a. A' blood group 

b. B' blood group 

c. O' blood group 

d. AB' blood group 


Answer- AB' blood group


Que- XO-XX pattern of sex determination is present in 

a. Grasshopper 

b. Butterfly 

c. Drosophila 

d. Man 


Answer- Grasshopper


Que- Tibia is a bone found in the ____________? 

a. Skull  

b. Arm  

c. Leg  

d. Face 


Answer- Leg


Que- Which is the largest gland in the human body? 

a. Thyroid  

b. Liver  

c. Pancreas  

d. None of these 


Answer- Liver


Que- Water has maximum density at____________? 

a. 0°C  

b. 4°C  

c. 4° K  

d. 4.8°C 


Answer- 4°C


Que- The scientific study of livings is called? 

a. Anatomy  

b. Biology  

c. Geology  

d. Zoology 


Answer- Biology


Que- The word “BIOLOGY” has been derived from_________ word? 

a. Latin  

b. English  

c. Greek  

d. French 


Answer- Greek


Que- According to modern system of taxonomy, living organisms have been classified into? 

a. Three Kingdoms  

b. Five Kingdoms  

c. Two Kingdoms  

d. Six Kingdoms 


Answer- Five Kingdoms


Que- Kingdom Protoctista includes____________? 

a. Fungi  

b. Prokaryotes  

c. protists  

d. Piantae 


Answer- protists


Que- Kingdom Fungi includes_______________? 

a. A cellular, eukaryotic organisms  

b. Non-chlorophylls, multicellular eukaiyotlc organisms  

c. Non-chlorophylls, multioellular,thailophytic organisms  

d. Chlorophyllus, multicellular, eukaryotic Organisms 


Answer- Non-chlorophylls, multioellular,thailophytic organisms


Que- Earthworm is included in_____________? 

a. Kingdom Plantae  

b. Kingdom Protoctista  

c. Kingdom Monera  

d. Kingdom Animalia 


Answer- Kingdom Animalia


Que- The Study of organisms inhabiting the sea and Ocean and the physical and chemical characteristics of their environment is: 

a. Social Biology  

b. Marine Biology  

c. Environmental Biology  

d. Fresh Water Biology 


Answer- Marine Biology

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