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.
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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Inner side vascular cambium give rise to?
A. Brak
B. Xylem
C. Phloem
D. Both a and b
Right Answer: B. Xylem
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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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Total number of different kinds of tRNA molecules in human cells are?
A. 40
B. 45
C. 50
D. 55
Right Answer: B. 45
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Which of the following can be used as bio filters?
A. Bacteria
B. Cyanobacteria
C. Acetabularia
D. All of these
Right Answer: A. Bacteria
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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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Outermost extra-embryonic membrane around foetus is?
A. Chorion
B. Amnion
C. Allantios
D. None of these
Right Answer: B. Amnion
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Another name of thalamus is?
A. Torus
B. Stolons
C. Pedicel
D. Both a and c
Right Answer: A. Torus
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Which of the following statement is not true about insectivorous plants?
A. These are true autotrophs
B. Trapped insects are digested by bacteria
C. They supplement their organic diet with inorganic compounds
D. All of these
Right Answer: C. They supplement their organic diet with inorganic compounds
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Females copoulatory organ?
A. Ovaries
B. Vagina
C. Clitoris
D. Cervix
Right Answer: B. Vagina
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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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The volume of the phage is about ________ of the host.
A. 1/10
B. 1/100
C. 1/1000
D. None of these
Right Answer: C. 1/1000
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The path of electron through two photo system during non cyclic photo phosphorylation is?
A. N – Scheme
B. P – Scheme
C. Z – Scheme
D. M – Scheme
Right Answer: C. Z – Scheme
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Which of the following is biodegradable plastic?
A. Polyvinyl chloride
B. Polyethylene
C. Polyhydroxy butyrate
D. Poly ether sulphide
Right Answer: C. Polyhydroxy butyrate
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About 60% of the total volume of the leaf is?
A. Air spaces
B. Compact leaf materials
C. Mesophyl cells
D. Both a and c
Right Answer: B. Compact leaf materials
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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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Which of the following pair is correctly matched?
A. Mesozoic era : Devonian period
B. Cainozoic ara : Jurrasic period
C. Proterozoic ara : qurternary period
D. Palaeozoic era : carboniferous period
Right Answer: D. Palaeozoic era : carboniferous period
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Green plants converts what?
A. Light energy into chemical energy
B. Chemical energy into light energy
C. Chemical energy into ATP
D. ATP energy into machenical energy
Right Answer: A. Light energy into chemical energy
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Tobacco pipes are made of the wood of?
A. Crataegus
B. Malus
C. Pyrus pastia
D. Fragaria
Right Answer: C. Pyrus pastia
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Inorganic iron is present in?
A. Cytochromes
B. Chlorophyll
C. Nucleic Acid
D. Both a & c
Right Answer: A. Cytochromes
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Which of the following is not accordance with phyletic lineage?
A. Reptiles evolved from amphibians
B. Birds evolved from reptiles
C. Mammals evolved from birds
D. Both birds and mammals evolved from reptiles
Right Answer: C. Mammals evolved from birds
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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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Total number of salivary glands in man is?
A. Three
B. Four
C. Five
D. Six
Right Answer: D. Six
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One most easily soluble in organic solvent?
A. Butyric acid
B. Caproic acid
C. Palmictic acid
D. OLEIC acid
Right Answer: D. OLEIC acid
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Testis produces sperms and secrete?
A. Testosterone
B. Progesterone
C. Estrogens
D. None of the above
Right Answer: A. Testosterone
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Which one play important role in the maintenance f cell shape?
A. Microtubules
B. Microfilaments
C. Intermediate filaments
D. All of these
Right Answer: C. Intermediate filaments
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At very high temperature globular structure essential for enzyme activity is lost and the enzyme is said to be?
A. Activated
B. Poisoned
C. Denatured
D. Inhibited
Right Answer: C. Denatured
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The marginal area of the blastoderm in the cells remain undetached from the yolk and closely adherent to it is called the?
A. Area pellucida
B. Area opaca
C. Zone of junction
D. Both b and c
Right Answer: C. Zone of junction
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Spores of Ustilago tritici are called?
A. Ascospores
B. Teliospores
C. Zygospores
D. Soredia
Right Answer: B. Teliospores
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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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The major cell infected by HIV is?
A. B-lymphocytes
B. T-lymphocytes
C. helper T-lymphocytes
D. Both a and b
Right Answer: C. helper T-lymphocytes
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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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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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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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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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Which of the following provides nourishment of the sperms?
A. Sertoli cells
B. Epididymis
C. Seminal vesicle
D. None of these
Right Answer: A. Sertoli cells
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Which of the following is related to salt tolerant plant?
A. Both insect and herbicide resistant
B. Infertile plants
C. Over production of channel proteins in tonoplast
D. None of these
Right Answer: C. Over production of channel proteins in tonoplast
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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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Number of caspomers present in herpes virus are?
A. 161
B. 162
C. 151
D. 152
Right Answer: B. 162
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Energy currency of the cell is?
A. ATP
B. FAD
C. NAD
D. NADPH
Right Answer: A. ATP
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An adult tobacco plant glowed when sprayed with the substrate?
A. Luciferin
B. Luciferase
C. Agarose gell
D. Can’t glow
Right Answer: A. Luciferin
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Emmigration and Immigration of members of a population may cause disturbance?
A. Genetic drift
B. Gene frequency
C. Gene pool
D. Genome
Right Answer: C. Gene pool
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Which of the following is caused by RNA enveloped virus?
A. Influenza
B. Mumps
C. Hepatitis – c
D. All of these
Right Answer: D. All of these
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Nucleohiston play important role in regulation of?
A. Gene expression
B. Replication
C. Cell division
D. Metabolism
Right Answer: A. Gene expression
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How many number of muscles in human body
A. 650
B. 650 pairs
C. 550
D. 550 pairs
Right Answer: A. 650
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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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Parental sperm and ovum is fertilized in virto – outside the female body and zygote is implanted back into the mother uterus. This technique is known as?
A. Tissue culturing
B. Cloning
C. k Test tube bodies
D. All of these
Right Answer: C. k Test tube bodies
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What is our principle source of energy?
A. Nuclear energy
B. Geothermal energy
C. Solar energy
D. Tidal energy
Right Answer: C. Solar energy
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The oxygen evolved as by – product during photosynthesis is form?
A. Water absorbs by the roots
B. CO2 taken from atmosphere
C. Chlorophyll
D. The sacts absorbed as solution
Right Answer: A. Water absorbs by the roots
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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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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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E. coli closed circle chromosomal measures approximately?
A. 11,000 μm
B. 12,000 μm
C. 13,000 μm
D. 14,000 μm
Right Answer: D. 14,000 μm
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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 common genetic code is the evolutionary evidence from?
A. Comparative anatomy
B. Molecular biology
C. Comparative embryology
D. Biogeography
Right Answer: B. Molecular biology
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The company sequenced the entire genome is?
A. Craig
B. Venter
C. Celera
D. Chimaeric
Right Answer: C. Celera
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Which one of the following reproduces asexually by “Budding”?
A. Planaria
B. Hydra
C. Amoeba
D.Both b and c
Right Answer: B. Hydra
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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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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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Excess of MSH is secreted in?
A. Cushing’s disease
B. Grave’s disease
C. Addison’s disease
D. Myxoedema
Right Answer: C. Addison’s disease
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Most marine invertebrates are?
A. Osmocorifermers
B. Osmoregulators
C. Both a and b
D. None of these
Right Answer: A. Osmocorifermers
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Brownish colour of the stool or fecal matter is due to?
A. Slouged off mucosal cells
B. Plant fibers
C. Cholesterols
D. Bile pigmets
Right Answer: D. Bile pigments
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Which of the following is not Angiosperms?
A. Pyrus
B. Oats
C. Cycas
D. Both a and c
Right Answer: C. Cycas
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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 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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Intimate close relationship between members of two different species is termed as?
A. Symbiosis
B. Mutualism
C. Commensialism
D. Parasitism
Right Answer: A. Symbiosis
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The essential raw material from which co-enzymes are made?
A. Vitamins
B. Proteins
C. Glycoprotein
D. Globular protein
Right Answer: A. Vitamins
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Classification of neurons as sensory motor and realy neurons is?
A. Physiological classification of neurons
B. Anatomical classification of neurons
C. Classification of neurons based upon size
D. None of these
Right Answer: A. Physiological classification of neurons
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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 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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Ferns are especially abundant in the?
A. Temperates
B. Tropics
C. Both a and b
D. None of these
Right Answer: B. Tropics
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Which of the following is related to fresh water habitate?
A. Drink large amount of water
B. Preference of salt containing food
C. Multilayered dead keratinized skin cells
D. Both a and c
Right Answer: B. Preference of salt containing food
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In cockroach partly digested food is stored in the?
A. Stomach
B. Crop
C. Ileum
D. Gizzard
Right Answer: B. Crop
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Armored mammals live only in which country?
A. Africa
B. America
C. Australia
D. New Zealand
Right Answer: B. America
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Which of the following pair is mismatched?
A. Insecta: Three pairs of jointed legs
B. Myriapoda: Body is divide into large number of segments
C. Arachnida: Appendages called chelicerae
D. Crustacae: Mites and ticks
Right Answer: D. Crustacae: Mites and ticks
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Amount of protein in super blue green algae is?
A. 50%
B. 60%
C. 70%
D. 80%
Right Answer: B. 60%
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The first cell of Gametophyte generation is?
A. Oospore
B. Spore
C. Zygote
D. Both a and b
Right Answer: B. Spore
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Seal / fish food relationship is?
A. parasitism
B. symbiosis
C. predation
D. mutualism
Right Answer: C. predation
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The largest invertibrates animal is?
A. Squid
B. Branchioceranthus
C. Physalia
D. Whale
Right Answer: A. Squid
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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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The destruction of all life forms is?
A. Vaccination
B. Chemotherapy
C. Sterilization
D. Immunization
Right Answer: C. Sterilization
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Frogs and toads all walk and hope on land due to its strong?
A. Fore limbs
B. Hind limbs
C. Pelvic girdle
D. None of these
Right Answer: B. Hind limbs
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Which of the following bone is included in “Appendicular skeleton”?
A. Clavicle
B. Palatine
C. Coccyx
D. Sternum
Right Answer: A. Clavicle
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The interval of time until the completion of next division is known as?
A. Reproduction time
B. Growth time
C. Generation time
D. Both b and c
Right Answer: C. Generation time
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Biological name of sundew is?
A. Drosera intermedia
B. Sarracenia pupurea
C. Dionaea muscipula
D. None of these
Right Answer: A. Drosera intermedia
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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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How many number of floating ribs in man?
A. 2
B. 4
C. 12
D. 10
Right Answer: C. 12
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Which of the following protein act as a catalyst in blood clotting process?
A. Prothrombin
B. Fibrinogen
C. Albumin
D. Both a & b
Right Answer: A. Prothrombin
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How many polar bodies are produced by one primary oocyte in human?
A. 1
B. 2
C. 3
D. 4
Right Answer: C. 3
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Enzymes of Lysosomes are synthesized on?
A. SER
B. RER
C. Golgi Apparatus
D. Nucleus
Right Answer: B. RER
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The rate of blood flow is lowest in the?
A. Arteries
B. Capillaries
C. Arterioles
D. Venules
Right Answer: B. Capillaries
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Mycelium is not found in?
A. Agaricus
B. Rhizopus
C. Yeast
D. Ustilago
Right Answer: C. Yeast
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The structures that are comparable to the organs of the body?
A. Cells
B. Tissues
C. Atoms
D. Organelles
Right Answer: D. Organelles
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The first product formed in a leaf as food and can be tested by students in laboratory is?
A. Sugar
B. Formaldehyde
C. Starch
D. Protein
Right Answer: C. Starch
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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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Which rays are not used in lithotripsy?
A. X – rays
B. Gamma rays
C. Ultrasounds
D. None of these
Right Answer: B. Gamma rays
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Lungs are present in?
A. Chest cavity
B. Thoracic
C. Pleural cavity
D. Both a and b
Right Answer: D .Both a and b
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No of Amino Acid constitute protein?
A. 170
B. 25
C. 20
D. 30
Right Answer: B. 25
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Bacteriograph viruses that infect bacteria were discovered independent by?
A. Watson and Crick
B. Schwann and Shleiden
C. Towert and Herelle
D. Stanley and Sutton
Right Answer: C. Towert and Herelle
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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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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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