Biology is the natural science that involves the study of life and living organisms, including their physical structure, chemical composition, function, development and evolution.Biology recognizes the cell as the basic unit of life, genes as the basic unit of heredity, and evolution as the engine that propels the creation of new species. Living organisms are open systems that survive by transforming energy and decreasing their local entropy to maintain a stable and vital condition defined as homeostasis. Biology divided into many specialized fields that cover their morphology, physiology, anatomy, behaviour, origin, and distribution.Just follow the Mcqs online quiz being dispatched over here with respect to your preparation for entry admission test NTS PPSC OTS PTS and missllenous job exams simultaneously.
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Biology Mcqs Online with Answers for NTS PPSC Entry Test Classes
Biology
Biology Mcqs with Answers Solved.
Structure comparable to the organs of the body are?
A. Tissues
B. Cells
C. Organelle
D. All of these
Right Answer: C. Organelle
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Denitrifying bacteria are?
A. Aerobic
B. Anaerobic
C. Microacerophilic
D. Both a and b
Right Answer: B. Anaerobic
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In ferns each sorus consist of number of sporangia covered by?
A. Inegument
B. Adventitious Lamina
C. Tonoplast
D. False indusium
Right Answer: D. False indusium
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The organs which can least withstand to anoxia?
A. Heart
B. Brain
C. Kidneys
D. Both a and b
Right Answer: D. Both a and b
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Hydra has?
A. Vase – like body
B. Leaf – like body
C. Sole – like body
D. Ribbon – like body
Right Answer: A. Vase – like body
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An aerobic bacterium is?
A. Campylobacter
B. E.Coli
C. Spirochete
D. Pseudomonas
Right Answer: D. Pseudomonas
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A sequence of change in the community structure of an ecosystem over a period of time is called?
A. Transformation
B. Succession
C. Grazing
D. Forestation
Right Answer: B. Succession
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Which of the following hormone is used to induce labor in pregnant women?
A. Estrogen
B. ACTH
C. Oxytocin
D. Vasopressin
Right Answer: C. Oxytocin
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Roots hair are extensions of?
A. Epidermis
B. Cortex
C. Both a and b
D. None of these
Right Answer: A .Epidermis
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Hoofed grazing animals, such as horses, cattle and sheep are called?
A. Ungulates
B. Rodents
C. Digitigrades
D. None of these
Right Answer: A. Ungulates
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Establishment of new forest where no forest existed before is known as?
A. Deforestation
B. Reforestation
C. Desertification
D. Aforestation
Right Answer: D. Aforestation
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Some balance or ratio between growth inhibitors and growth stimulators is involved in?
A. Tropic movements
B. Tactic movements
C. Nastic movements
D. Tropic movements
Right Answer: C. Nastic movements
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Apart from immunity system HIV can infact?
A. Digestive system
B. Respiratory system
C. Nervous system
D. Circulator system
Right Answer: C. Nervous system
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Optimum temperature of human body is?
A. 37K
B. 37F
C. 37C°
D. All of these
Right Answer: C. 37C°
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Bacteria are being used as?
A. Bioremediation
B. Biopesticides
C. Both a and b
D. None of these
Right Answer: B. Biopesticides
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An enzyme that can be used to treat Lyosome storage disease is?
A. Glukokinase
B. α- Glukokinase
C. β-Galactosidase
D. α- Galactosidase
Right Answer: D. α- Galactosidase
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During first phase of digestion (in amoeba) pH is?
A. 5
B. 5.2
C. 5.4
D. 5.6
Right Answer: D. 5.6
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Plant cells that have had cell wall removed are called?
A. Proplasm
B. Protoplast
C. Totipotent
D. Fragile cell
Right Answer: B. Protoplast
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The removal apex releases the lateral buds from apical dominance. It is called?
A. Inhibitory effect
B. Compensatory effect
C. Initation effect
D. Both a and c
Right Answer: B. Compensatory effect
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Which of the following is not included in bark?
A. Cork
B. Cortex
C. Phloem
D. Vascular cambium
Right Answer: D. Vascular cambium
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The word biology has been derived from two ________ words.
A. Greek
B. Latin
C. Arabic
D. French
Right Answer: A. Greek
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Which is not the function of oral cavity?
A. Mastication
B. Digestion
C. Lubrication
D. Deglutition
Right Answer: D. Deglutition
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Incomplete of imperfect digestion of food is called?
A. Food poisoning
B. Dyspepsia
C. Piles
D. Dysentry
Right Answer: C. Dyspepsia
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Ecology is mainly concerned with?
A. Organism
B. Population
C. Community
D. All of these
Right Answer: D. All of these
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The utilization of the products of digestion for production of energy or synthesis of cellular material is termed as?
A. Absorption
B. Assimilation
C. Digestion
D. Egestion
Right Answer: B. Assimilation
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No of layers in cell wall is?
A. 1
B. 2
C. 3
D. 4
Right Answer: C. 3
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The cells that cling to an egg after ovulation are known as?
A. Callus cells
B. Cumulus cells
C. Parenchyma cells
D. Sertoli cells
Right Answer: B. Cumulus cells
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Book lungs are observed in which class?
A. Crustacae
B. Insecta
C. Arachnida
D. Myriapoda
Right Answer: C. Arachnida
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The place on the chromosomes where spindle fibers are attached during cell division is?
A. Centro mere
B. Chromatin
C. Kinetochore
D. Centrsome
Right Answer: A. Centro mere
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In round worms nerve ring is present around?
A. Mouth
B. Alimentary canal
C. Pharynx
D. Gat
Right Answer: C. Pharynx
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Generals hormones are?
A. Acetylcholine
B. Growth hormone
C. Secretin
D. Cholecystokinin
Right Answer: B. Growth hormone
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Which of the following factor does not affect the gene frequency?
A. Mutation
B. Genetic drift
C. Random mating
D. None of these
Right Answer: C. Random mating
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Alary muscles helps in?
A. The flow of blood
B. Gaseous exchange
C. Contraction of blood
D. Excretion
Right Answer: A. The flow of blood
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Limbs regeneration has been studied mostly in?
A. Frogs
B. Lizards
C. Salamanders
D. Earthworm
Right Answer: C. Salamanders
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Asexual phase of the life cycle of malarial parasite is complete in?
A. Mosquito
B. Human
C. Insects
D. Both a and b
Right Answer: B. Human
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The diaphragm present in the mammal helps in?
A. Sound production
B. Leaping
C. Breathing
D. Excretion
Right Answer: C. Breathing
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Which of the following group may be colonial?
A. Amoeba
B. Foraminifera
C. Actinopods
D. Zoo-flagellate
Right Answer: D. Zoo-flagellate
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Which of the following hormone is secreted after ovulation?
A. FSH
B. Oestrogen
C. LH
D. Progesterone
Right Answer: D. Progesterone
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All seed producing plant s are called?
A. Sporophytes
B. Spermatophytes
C. Flowering plants
D. All of these
Right Answer: B. Spermatophytes
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Which of the following is incorrect about “CALLUS”?
A. Originate from pith
B. Form over the wound
C. Soft parenchymatous tissues
D. Unites the branches during budding & grafting
Right Answer: A. Originate from pith
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The organism used to reduce pollution of heavy metals by bio absorption?
A. Fungi
B. Virus
C. Bacteria
D. Algae
Right Answer: D. Algae
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Which of the following inhibit the growth of Micro-organism on living Surface?
A. disinfectants
B. Antiseptic
C. Antibiotics
D. All of these
Right Answer: B. Antiseptic
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The actual position where an organism lives is called its?
A. habitat
B. Locus
C. Habitat
D. Niche
Right Answer: C. Habitat
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A cell suspension culture of Cinchona ledgeriana produce?
A. Digitoxin
B. Quinine
C. Digoxin
D. Quinidine
Right Answer: B. Quinine
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Initially the classification was based on _________ of plants and animals.
A. Physiology
B. Morphology
C. Histology
D. None of these
Right Answer: B. Morphology
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Which of the following enzymes works best in basic medium?
A. Arginase
B. Pepsin
C. Sucrose
D. Enterokinase
Right Answer: A. Arginase
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The apoenzyme and the cofactor together constitute the whole or complete enzyme termed as?
A. Ribozymes
B. Holoenzymes
C. NAD
D. Biotin
Right Answer: B. Holoenzymes
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Diseases in living organism, which are caused by parasites are called?
A. Inflammation
B. Pioneers
C. Hydrosere
D. Xerosere
Right Answer: B. Pioneers
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Number of species of ROSACEAE family reported in Pakistan?
A. 100
B. 213
C. 29
D. 2000
Right Answer: B. 213
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The two opposite and two parallel strands of DNA are held together by?
A. Ionic bond
B. Covalent bond
C. Hydrogen bond
D. Ester linkage
Right Answer: C. Hydrogen bond
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Misuse of streptomycin can cause?
A. Deafness
B. Allergic reaction
C. Discolouration of teeth
D. Miosis
Right Answer: A .Deafness
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The process of shedding of exoskeleton is called?
A. Moulting
B. Decomposition
C. Pedipalps
D. Carapace
Right Answer: A. Moulting
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During contraction of muscles which of the following does not decrease?
A. I – bond
B. H – bond
C. length of sarcomere
D. A bond
Right Answer: A. A bond
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Incorrect statement about population is?
A. Consist of potentially interbreeding organisms
B. All number belongs of same species
C. Located in the same area at same time
D. Consist of all biotic factors of ecosystem
Right Answer: D. Consist of all biotic factors of ecosystem
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Glyceraldeyde is a?
A. Triose
B. Tetrose
C. Pantose
D. Hexose
Right Answer: A. Triose
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The idea of inheritance of acquired characteristics was presented by?
- Margulis
- Cuvier
- Linnaeus
- Lamarck
Right Answer: Lamarck
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Flowering parts are considered to have evolved from?
A. Shoots
B. Leaves
C. Seed
D. None of these
Right Answer: B. Leaves
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Hepatic portal vein is formed by many veins collecting deoxygenated blood from different parts of alimentary canal, pass the blood to?
A. Inferior vana cava
B. Right atrium
C. Liver
D. Kidney
Right Answer: C. Liver
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The number and variety of species in a place called?
A. Biogeography
B. Zoogeography
C. Biodiversity
D. Texonomy
Right Answer: C. Biodiversity
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The DNA molecule had a shape of a helix with a diameter of?
A. 0.34 nm
B. 2nm
C. 34 A °
D. 4nm
Right Answer: B. 2nm
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What is Prophage?
A. RNA virus
B. a hybrid of bacterial and viral DNA
C. a stage in lytic cycle
D. None of these
Right Answer: B. a hybrid of bacterial and viral DNA
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In which of the following waste compounds into the soil are used as chemical weapons against other competing plants?
A. Angiosperms
B. Conifers
C. Bryophytes
D. Both a and b
Right Answer: B. Conifers
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The epithelial cells of villi are constantly shed into intestine. These cells are replaced by the new cells moving up due to rapid cell division in?
A. Oxyntic cell
B. Zymogen
C. Crypts
D. Polyps
Right Answer: C. Crypts
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Discharge of blood from blood vessels is known as?
A. Myocardial infraction
B. Cerebral infraction
C. Stroke
D. Hemorrhage
Right Answer: D. Hemorrhage
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A protein attached with lecithin to form?
A. Glycoprotein
B. Chromo protein
C. Phospho protein
D. Lipoprotein
Right Answer: D. Lipoprotein
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Pelvic and leg bones are useless vestiges in?
A. Whale
B. Snakes
C. Man
D. Both a and b
Right Answer: D. Both a and b
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The branch of biology which deals with the abnormal development and their causes is called?
A. Teratology
B. Mammology
C. Ornithology
D. Human biology
Right Answer: A. Teratology
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Which one is Globular protein?
A. Antibodies
B. Fibrin
C. Myosin
D. Keratin
Right Answer: A. Antibodies
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Which of the following organic nutrient in the blood serves as a precursor of steroid hormone?
A. Phospholipid
B. Cholesterol
C. Lactic acid
D. Both a & b
Right Answer: B. Cholesterol
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The functional specificity of every enzyme is due to its?
A. Special chemistry
B. Specific configuration
C. Both a and b
D. None of these
Right Answer: C. Both a and b
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The distribution of organism in space can be studied through?
A. Niche
B. Community
C. Biome
D. Ecosystem
Right Answer: C. Biome
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The normal pH of human blood is?
A. 7.1
B. 7.2
C. 7.3
D. 7.4
Right Answer: D. 7.4
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The most abundant cartilage in human body is?
A. Hyaline
B. Elastic
C. Fibre
D. None of these
Right Answer: A. Hyaline
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Which of the following hormone is polypeptide in nature?
A. Oxytocin
B. Leuttinizing hormone
C. Erythropoielin
D. Estrogen
Right Answer: A. Oxytocin
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None membranous cell organelle is?
A. Ribosomes
B. Vacuoles
C. Lysosomes
D. Peroxisomes
Right Answer: A. Ribosomes
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In Escherichia coil plasmid were discovered by investigators while studying their?
A. Nutritive life
B. Parasitic life
C. Sex life
D. All of these
Right Answer: C. Sex life
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First complete seeds appeared approximately 365 million years ago during late?
A. Cambrian time
B. Ordovician time
C. Silurian time
D. Devonian time
Right Answer: D. Devonian time
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Fossil fuels are example of?
A. Renewable resources
B. Non-Renewable resources
C. In exhaustible resources
D. Both b and c
Right Answer: B. Non-Renewable resources
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In nitrogen cycle, bacteria that converts relatively toxic nitrite to nitrate is?
A. Nitrifying bacteria
B. Nitrosomonas
C. Nitrococcus
D. Nitrobacter
Right Answer: D. Nitrobacter
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The most common rust fungi is?
A. Puccinia
B. Ustilago
C. Both a and b
D. None of these
Right Answer: A. Puccinia
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Total number of Amino Acids in haemoglobin?
A. 141
B. 151
C. 574
D. 10,000
Right Answer: C. 574
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In peritoneal dialysis, peritoneal cavity is filled with dialysis fluid that enters the body through a?
A. Vein
B. Catheter
C. Shunt vein
D. Urethra
Right Answer: B. Catheter
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Which developed the technique of vaccination in 1975?
A. Louis Pasture
B. Walter Sutton
C. Edward Jenner
D. None of these
Right Answer: C. Edward Jenner
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Nuclic Acids were 1st isolated in?
A. 1795
B. 1870
C. 1822
D. 1882
Right Answer: B. 1870
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Weight of kidneys accounts for?
A. 1% of the total body weight
B. More than 1% of the total body weight
C. Less than 1% of the total body weight
D. None of these
Right Answer: C. Less than 1% of the total body weight
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The study of relationship of different communities to their environment is called?
A. Synecology
B. Community ecology
C. Autecology
D. Both a and b
Right Answer: D. Both a and b
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Who modified five kingdom system of Robert Whittaker?
A. Schwann and Shleiden
B. Watson and Crick
C. Margulis and Schwartz
D. Lynn and Morgan
Right Answer: C. Margulis and Schwartz
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Which one of the following is cranial and paired bone?
A. Maxilla
B. Occipital
C. Temporal
D. Palatine
Right Answer: C. Temporal
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The technique of recording the electrical activity of the heart is?
A. Electrocardiography
B. Electrocardiogram
C. Electrocardiograph
D. None of these
Right Answer: B. Electrocardiogram
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Plants bend towards light?
A. Because the roots send a message to the upper portion of the plants to do so
B. Because the secretion of growth promoting substance at the bend
C. Because the secretion of growth promoting substance at the top
D. As a result of food material trans located from leaves
Right Answer: B. Because the secretion of growth promoting substance at the bend
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The recovery from Anorexia nervosa is very slow. It may take?
A. 2 – 3 year
B. 2 – 4 year
C. 2 – 5 year
D. 4 – 5 year
Right Answer: B. 2 – 4 year
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Organs structurally different but functionally alike are?
A. Homologous
B. Analogous
C. Both a and b
D. None of these
Right Answer: B. Analogous
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Florigen hormone is produced in?
A. Ethylene
B. Methylene
C. Acetic acid
D. Amino acid
Right Answer: A. Ethylene
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The edge of fern sporangium is divided?
A. Two parts
B. Three parts
C. Four parts
D. Five parts
Right Answer: A. Two parts
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Tentative explanation of observation is known as?
A. Hypothesis
B. Theory
C. Deduction
D. Law
Right Answer: A. Hypothesis
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Which of the following enzyme works best in basic medium?
A. Arginase
B. Pepsin
C. Sucase
D. Enterokinase
Right Answer: A. Arginase
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Double fertilization in the characteristics feature of?
A. Ferns
B. Gymosperms
C. Angiosperms
D. All of these
Right Answer: C. Angiosperms
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In plant cells nucleus is pushed towards periphery due to the presence of?
A. Cell wall
B. Vacuole
C. Pastids
D. Glyoxisomes
Right Answer: B. Vacuole
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Regeneration of which plant from protoplast produces infertile plants?
A. Wheat
B. Cotton
C. Rice
D. All of these
Right Answer: A. Wheat
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Spinal nerves included in parasympathetic nervous system arise from the?
A. Upper portion of spinal cord
B. Middle portion of spinal cord
C. Bottom portion of spinal cord
D. None of these
Right Answer: C. Bottom portion of spinal cord
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