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.
Absorption of water and minerals takes place in?
A. Small intestine
B. Large intestine
C. Jejumum
D. Ileum
Right Answer: B. Large intestine
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Which enzymes seals the foreign peace of DNA into the vector?
A. Reverse transcriptase
B. Endo nuclease
C. Ligase
D. Polymerase
Right Answer: C. Ligase
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Multi sensory hydraulic values are?
A. Stomata
B. Mesophylls
C. Guard cells
D. Lenticles
Right Answer: C.Guard cells
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Commonly used restriction enzyme is?
A. Eco R1
B. p SC101
C. pBR322
D. All of these
Right Answer: A. Eco R1
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Haemophilia B is due to disturbance in factor?
A. VIII
B. IX
C. XI
D. None of these
Right Answer: B. IX
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The most abundant protein in chloroplast is?
A. Actin
B. Myosin
C. Rubisco
D. Tebulin
Right Answer: C. Rubisco
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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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Hormone of adrenal cortex is?
A. Adrenaline
B. Nor epinephrine
C. Androgens
D. None of these
Right Answer: C. Androgens
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The substance which cannot across the cell membrane more easily are?
A. Hydrphobic
B. Hydrophilic
C. Ionic
D. Inorganic
Right Answer: C. Ionic
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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 incorrect statement about active site is?
A. Charge bearing site
B. Three dimensional cavity
C. Made up of two definite regions
D. Non protein part of enzyme
Right Answer: D. Non protein part of enzyme
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In favourable conditions slime mold spores germinate into?
A. Zygote
B. Swarm cells
C. Sporophyte generation
D. Gametocytes
Right Answer: B. Swarm cells
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Which principle part of the food is digested in stomach?
A. Ftas
B. Carbohydrates
C. Proteins
D. All of these
Right Answer: C. Proteins
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Amount of lipids in plasma membrane is about?
A. 20 – 40%
B. 20 – 60%
C. 40 – 69%
D. 40 – 80%
Right Answer: A. 20 – 40%
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What statement about species is not true?
A. Interbreed freely among themselves
B. Produce fertile offspring
C. Independent evolutionary units
D. Can exchange genes with other species
Right Answer: D. Can exchange genes with other species
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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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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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Which is correct food chain?
A. Grass → Shrew → Mole → Owl
B. Owls → Shrew → Insect → Grass
C. Grass → Grazing insect → Shrews → Owls
D. Grass → Insect → Shrews → Owl
Right Answer: C. Grass → Grazing insect → Shrews → Owls
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Only one pair of chromosome is present in?
A. Ferns
B. Mosquito
C. Penicillium
D. Sugarcane
Right Answer: C. Penicillium
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Meiosis does not occur at?
A. Formation of egg in Honey bee
B. Formation of egg in aphid
C. Formation of egg in man
D. Formation of egg in rose
Right Answer: A. Formation of egg in Honey bee
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Who said in 1902 that plant cells are totripotcnt?
A. G. Herberlandt
B. John C. Sanford
C. Sanger
D. Alferd Harry
Right Answer: A. G. Herberlandt
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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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Which division of nervous system prepares the body for stressful and energetic activity fight or flight?
A. Autonomic nervous system
B. Parasympathetic nervous system
C. Sympathetic nervous system
D. Peripheral nervous system
Right Answer: C. Sympathetic nervous system
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The organic compound needed to make artificial sugar is?
A. Nutrasweet
B. Aspartame
C. Phenylalanine
D. All of these
Right Answer: C. Phenylalanine
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A large regional community primarily determined by climates is known as?
A. Biome
B. Biotic factors
C. Biosphere
D. Abiotic factors
Right Answer: A. Biome
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Large intestine also harbors a large population of bacteria that synthesize some vitamins especially vitamin?
A. C
B. D
C. K
D. All of these
Right Answer: C. K
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In most animals the epithelium which separates air and blood is only?
A. One called thick
B. Two called thick
C. Three called thick
D. None of these
Right Answer: B. Two called thick
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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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A flower is a modified?
A. Leaf
B. Stem
C. Shoot
D. None of these
Right Answer: C. Shoot
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The shape of the diaphragm is more dome like when its muscles are?
A. Relaxed
B. Contracted
C. Both a & b
D. None of these
Right Answer: A. Relaxed
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In round worms muscles are arranged into?
A. Two bonds
B. Three bonds
C. Four bonds
D. Five bonds
Right Answer: C. Four bonds
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If the DNA in all of the cells of an adult human were lined up end to end, it would stretch nearly?
A. 60 times the distance from earth to Jupiter
B. 60 times the distance from earth to moon
C. 50 times the distance from earth to Jupiter
D. 50 times the distance from earth to moon
Right Answer: A. 60 times the distance from earth to Jupiter
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Number of RBC’s formed and destroyed every second in a normal person is?
A. 5 – 10 M
B. 4 – 10 M
C. 3 – 10 M
D. 2 – 10 M
Right Answer: D. 2 – 10 M
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What is the function of heat – shock proteins in plants?
A. Cause evaporative cooling
B. Control opening and closing of stomata
C. Prevent denaturation of enzymes
D. Changes the solute composition of the cell
Right Answer: C. Prevent denaturation of enzymes
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Layering is the characteristics features of?
A. Desert ecosystem
B. Grass land ecosystem
C. Tundra ecosystem
D. None of these
Right Answer: B. Grass land ecosystem
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Ovulation is the liberation of the ovum from ovary into the?
A. Peritoneal cavity
B. Fallopian tube
C. Uterus
D. None of these
Right Answer: B. Fallopian tube
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A substance that inhibit blood clotting is?
A. Histamin
B. Heparin
C. Interferon
D. All of these
Right Answer: B. Heparin
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Naked seeded plants are called?
A. Angiosperms
B. Gymosperms
C. Flowering plants
D. None of these
Right Answer: B. Gymosperms
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The first eukaryote appeared about ________ years ago.
A. 4 billion
B. 3.5 billion
C. 2.5 billion
D. 1.5 billion
Right Answer: D. 1.5 billion
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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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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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The total inside capacity of lungs is about?
A. 3 liters
B. 4 liters
C. 5 liters
D. 3.5 liters
Right Answer: C. 5 liters
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Another name of internal Morphology is?
A. Physiology
B. Anatomy
C. Histology
D. Embryology
Right Answer: B. Anatomy
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The body cavity of arthropods is called?
A. Spongocoel
B. Enteron
C. Coelom
D. Haemocoel
Right Answer: D. Haemocoel
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XXY individual produced through non disjunctional gametes in Drosophila is a fertile
A. Male
B. Female
C. Both a and b
D. None of these
Right Answer: B. Female
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Number of cranial nerves present in the brain of bony fishes?
A. 10
B. 20
C. 30
D. 40
Right Answer: B .20
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Effect of adrenaline and noradrenalin in raising blood pressure is?
A. Antagonistic
B. Synergistic
C. Random
D. All of these
Right Answer: B. Synergistic
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The amount of DNA in germ cells (sperm & ova) is ______ to that of somatic cells?
A. Double
B. Equal
C. One half
D. One third
Right Answer: C. One half
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Non-myelinated nerve fibres are present in?
A. Gray matter
B. White matter
C. Both a and b
D. None of these
Right Answer: A. Gray matter
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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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Short-term fluctuations in temperature, humidity, cloud cover, wind and precipitation over periods of hours or days is?
A. Weather
B. Climate
C. Both a and b
D. None of these
Right Answer: A. Weather
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The condition in which one of sex chromosome is missing is known as?
A. Klinefelter’s syndrome
B. Turner’s syndrome
C. Jacob’s syndrome
D. Both b and c
Right Answer: B. Turner’s syndrome
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The soft part of the molluscan body has?
A. Exoskeleton
B. Hydrostatic skeleton
C. Endoskeleton
D. No skeleton
Right Answer: B. Hydrostatic skeleton
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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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In 1840.s, staple food of Irish people was?
A. Corn
B. Wheat
C. Rice
D. Potatoes
Right Answer: D. Potatoes
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Which of the following is biotic component of ecosystem?
A. Gravity
B. Topography
C. Decomposers
D. Soil energy
Right Answer: C. Decomposers
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Heart is present inside?
A. Chest cavity
B. Pleural cavity
C. Pericardial cavity
D. Thorax
Right Answer: C. Pericardial cavity
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Hyoscyamus niger is a?
A. Shot day plant
B. Long day plant
C. Day-neutral palnt
D. None of these
Right Answer: B. Long day plant
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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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Who discovered bacteria?
A. Ivanowski
B. Leewenhock
C. Stanely
D. Esward Jenner
Right Answer: B. Leewenhock
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Biennial and perennial plants are stimulated to flower by exposure to low temperature. This is called?
A. Vernalisatin
B. Moulting
C. Apomixis
D. None of these
Right Answer: A. Vernalisatin
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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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The branch of biology which deals with the study of aging is called?
A. Gerotology
B. Demography
C. Teratology
D. All of these
Right Answer: A. Gerotology
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The overall patterns of weather that prevail from year to year even century to-century in a particular region is called?
A. Weather
B. Climate
C. Both a and b
D. None of these
Right Answer: B. Climate
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A group of ribosomes attached to mRNA are known as?
A. Polymers
B. Polypeptide
C. Polysomes
D. Polymerase
Right Answer: C. Polysomes
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Genetic drift occurs in a population that is?
A. Mobile
B. Isolated
C. Small in number
D. Have few gene mutations
Right Answer: C. Small in number
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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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In gene sequencing, the DNA fragments are separated by a process known as?
A. Agarose gel
B. Electrophorosis
C. Alkalization
D. Electroplating
Right Answer: B. Electrophorosis
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The incidence of calcium phosphate kidney stones is about?
A. 70%
B. 15%
C. 10%
D. 5%
Right Answer: B. 15%
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In planaria undigested food is egested through the?
A. Anus
B. Blastopore
C. Mouth
D. Cloaca
Right Answer: C. Mouth
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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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Parasite causing African sleeping sickness is transmitted by the bite of infected?
A. Insect
B. Mosquito
C. Tsetse fly
D. Both b and c
Right Answer: C. Tsetse fly
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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 related to Oomycota?
A. Heterotrophic
B. Lack centriole
C. Chitin in cell wall
D. All of these
Right Answer: C. Chitin in cell wall
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The plasma membrane and everything present within is known as?
A. Cytoplasm
B. Protoplasm
C. Cytosol
D. Mycoplasm
Right Answer: B. Protoplasm
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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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A marine coelenterate that exhibits alternations of generations is?
A. Hydra
B. Obelia
C. Aurelia
D. Jelly fish
Right Answer: B. Obelia
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Amount of CO2 in 100 ml of venous blood is?
A. 50 ml
B. 54 ml
C. 4 ml
D. None of these
Right Answer: B. 54 ml
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Spherical shape virus is?
A. T. M. V
B. Polio virus
C. Bacteriophage
D. Herper virus
Right Answer: B. Polio virus
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The study internal state of homeostasis is known as?
A. Pathogenesis
B. Normal health
C. Hypertrophy
D. Infection
Right Answer: B. Normal health
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Which of the following is not present in glomerular filtrate?
A. Glucose
B. Urea
C. Salts
D. Erythrocytes
Right Answer: D. Erythrocytes
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An integumented, indehiscent magasporangium is known as?
A. Seed
B. Emryo sac
C. Fruit
D. Ovule
Right Answer: D. Ovule
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That association between organisms in which both partners get benefits each other is called?
A. Mutualism
B. Commesalism
C. Competition
D. Predation
Right Answer: A. Mutualism
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The destruction of all life forms is?
A. Vaccination
B. Chemotherapy
C. Sterilization
D. Immunization
Right Answer: C. Sterilization
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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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First living organism evolved about?
A. 5000 M yrs ago
B. 4000 M yrs ago
C. 3000 M yrs ago
D. 2000 M yrs ago
Right Answer: C. 3000 M yrs ago
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What is the function of brown fats in mammals?
A. Prevent dehydration
B. Promote evaporation
C. Specialized for rapid heat production
D. Involve in vasodilatation and vasoconstriction
Right Answer: B. Promote evaporation
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The center of most unconscious emotional behaviors, such as love hatred hunger, sexual responses and fear is?
A. Cerebrum
B. Limbic system
C. Thalamus
D. Pineal gland
Right Answer: B. Limbic system
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Number of ascospores in each Ascus is?
A. Two
B. Four
C. Eight
D. Ten
Right Answer: C. Eight
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Which of the following statement is not true about porifera?
A. Sponges lack symmetry
B. Mesenchyme contains amoeboid cells
C. Outer layer is choanoderm
D. Spongocoel is present
Right Answer: C. Outer layer is choanoderm
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Complete mixing of oxygenated and deoxygenated blood in ventricle is observed in?
A. Fishes
B. Amphibians
C. Reptiles
D. All vertebrates
Right Answer: B. Amphibians
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Which phase of menstrual cycle ends with ovulation?
A. Proliferation phase
B. Secretory phase
C. Menstruation phase
D. None of these
Right Answer: A. Proliferation phase
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A chlorophyll molecule has?
A. Five main parts
B. Four main parts
C. Three main parts
D. Two main parts
Right Answer: D. Two main parts
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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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Which of the following statement is incorrect about photorespiration?
A. Light dependent process
B. CO2 is released and O2 is absorbed
C. Produce energy such as ATP
D. Rubisco act as oxygenase
Right Answer: C. Produce energy such as ATP
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The cork tissue has special pores called?
A. Stomata
B. Lenticels
C. Micropyl
D. Both a and b
Right Answer: B. Lenticels
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All bacteria are?
A. Diploid
B. Haploid
C. Monoploid
D. Both b and c
Right Answer: B. Haploid
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A parasitic angiosperms that lack chlorophyll is?
A. Fragrant water lily
B. Wild geranium
C. Indian pipe
D. None of these
Right Answer: C. Indian pipe
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Wrist bones are called?
A. Tarsals
B. Meta tarsals
C. Carpals
D. Tibia
Right Answer: C. Carpals
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Which of the following characteristics of viruses is not like that of living things?
A. Crystal formation
B. Respiration
C. Growth
D. Reproduction
Right Answer: A. Crystal formation
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