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.
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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According to which hypothesis aerobic bacteria developed into mitochondria?
A. Vent
B. Endosymbiont
C. Membrane invagination
D. All of these
Right Answer: B. Endosymbiont
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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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Sclerotization and impregation with calcium carbonate take place in?
A. Procuticle
B. Epicticual
C. Ectoderm
D. Both a & b
Right Answer: A. Procuticle
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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 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 approximate diameter of peroxisomes is?
A. 5μm
B. 0.5μm
C. 0.05μm
D. 0.005μm
Right Answer: B. 0.5μm
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The sequence of nucleotides that determines the amino acid sequence of a protein is called a?
A. Codon
B. Anticodon
C. Gene
D. All of these
Right Answer: C. Gene
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Herpes simplex is caused by?
A. RNA virus
B. DNA virus
C. Enveloped RNA virus
D. Both a and c
Right Answer: B. DNA virus
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In honeybees, union of sperm and egg result into the development of diploid except?
A. Drone bee
B. Queen bee
C. Worker bee
D. None of these
Right Answer: A. Drone bee
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Organisms having foreign DNA incorporated into their cells are known as?
A. Transgenic organisms
B. Transgenic plant
C. Transgenic animal
D. Genetic Engineering
Right Answer: A. Transgenic organisms
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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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Gene for blue opsin is present on autosome number?
A. 7
B. 21
C. 9
D. 11
Right Answer: A. 7
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The codons which code for the same amino acid are called?
A. Probes
B. Introns
C. DNA profile
D. Synonyms
Right Answer: D. Synonyms
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Which of the following is not a stop codon?
A. UAA
B. UAG
C. UGA
D. AUG
Right Answer: D. AUG
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Growth controlling factor at stem tip is?
A. Any hormone
B. Auxin
C. Apical bud
D. Light
Right Answer: B. Auxin
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Which of the following is anti viral / anti cancer protein?
A. Urokinase
B. Thymosin
C. Insulin
D. Interferon
Right Answer: D. Interferon
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Dandruff in hair is caused by?
A. Bacteria
B. Algae
C. Fungi
D. Cyanobacteria
Right Answer: C. Fungi
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Amygdala is part of?
A. Fore brain
B. Mid brain
C. Hind brain
D. None of these
Right Answer: A. Fore brain
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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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Tobacco plant belongs to which family?
A. Cassia family
B. Potato family
C. Acacia family
D. Pea family
Right Answer: B. Potato family
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Oils may contain upto?
A. 4 double bonds
B. Six double bonds
C. 8 double bonds
D. No double bonds
Right Answer: B. Six double bonds
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Which of the following is true about mammals?
A. They have right aortic arch only
B. They have left aortic arch only
C. They have left and right aortic arches only
D. They do not have aortic arches
Right Answer: B. They have left aortic arch only
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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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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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Which is true about alternation of generation in coelenterates?
A. Both generations are diploid
B. Both generations are free living
C. Both generations reproduce asexually
D. All of these
Right Answer: A. Both generations are diploid
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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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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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In small pox raised fluid filled vesicles are formed?
A. Papules
B. Macules
C. Pustules
D. None of these
Right Answer: C. Pustules
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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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Site for urea cycle in the body is?
A. The kidney
B. The liver
C. The spleen
D. All of these
Right Answer: B. The liver
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Siprochete is?
A. thick, flexible, spiral
B. thin, rigid, spiral
C. thick, rigid, spiral
D. thin, flexible, spiral
Right Answer: D. thin, flexible, spiral
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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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Which of the following is not found in most of the plant cells?
A. Flagellum
B. Centriole
C. Lyso-some
D. All a, b and c
Right Answer: D. All a, b and c
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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 space between lungs and pleural membrane termed as?
A. Chest cavity
B. Pleural cavity
C. Thoracic cavity
D. Both a and c
Right Answer: B. Pleural cavity
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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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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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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 is correct about co-factor?
A. Non proteins part
B. Act as bridge
C. Essential for normal functioning
D. All a, b and c
Right Answer: D. All a, b and c
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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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Which statement is true about EUGLENA?
A. don’t have definite membranous nucleus
B. Cell wall is absent
C. Autotroph (presence of chlorophyll)
D. Both b and c
Right Answer: D. Both b and c
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The distance between adjacent base pairs of DNA double helix is?
A. 0.34A0
B. 3.4A0
C. 34A0
D. None
Right Answer: A. 0.34A0
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Fibrous protein has?
A. Primary structure
B. Secondary structure
C. Tertiary structure
D. Quaternary structure
Right Answer: B. Secondary structure
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Which of the following is not a viral disease?
A. Cowpox
B. Mumps
C. Tetanus
D. Small pox
Right Answer: C. Tetanus
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Nasal cavities lined with mucous membrane of?
A. Columnar epithelium
B. Squamous epithelium
C. Ciliated epithelium
D. Epithelium
Right Answer: C. Ciliated epithelium
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Approximate diameter of RBC is?
A. 7µ m
B. 8µ m
C. 9µ m
D. None of these
Right Answer: B. 8µ m
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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 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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All vertebrate embryoes go through a stage in which they have gill pouches on the sides of layer?
A. Head
B. Throat
C. Thorax
D. All of these
Right Answer: B. Throat
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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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Our brain cell contain?
A. 65% H2O
B. 89% H2O
C. 20% H2O
D. 85% H2O
Right Answer: D. 85% H2O
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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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The disease due to lack of hypoxanthine – guanine phosphoribosyltransferase is?
A. Ducheune muscular dystrophy
B. Lesch nyham syndrome
C. Fragile X syndrome
D. Spastic paraplegia
Right Answer: B. Lesch nyham syndrome
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All are involved in synaptic transmission within the brain and spinal cord except?
A. Serotonin
B. Dopamine
C. Adrenaline
D. Acetylcholine
Right Answer: D. Acetylcholine
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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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Protein which can be crystallized?
A. Hemoglobin
B. Keratin
C. Myosin
D. Silk fiber
Right Answer: A. Hemoglobin
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Cone cells have specific light absorbing proteins called?
A. Pepsin
B. Tubulin
C. Opsins
D. Myosin
Right Answer: C. Opsins
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Mammalian kidney including human is adapted to conserve water by?
A. 99.4%
B. 99.5%
C. 99.6%
D. 99.7%
Right Answer: B. 99.5%
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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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Classification of algae is largely based on their?
A. Sex organs
B. Pigment composition
C. Habitate
D. All of these
Right Answer: B. Pigment composition
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The pelvic girdle is united firmly to the vertebral column at?
A. Coccyx region
B. Sacral region
C. Lumber region
D. Both a and b
Right Answer: B. Sacral region
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Which of the following statement is not true about protostomes?
A. Cleavage is radial and indeterminate
B. Mesoderm is derived from the wall of gut
C. Coelom is developed as an outpouching of archeteron
D. Mouth arise from blastopore
Right Answer: D. Mouth arise from blastopore
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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 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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A series of hypothesis supported by the results of many tests is then called?
A. Theory
B. Scientific law
C. Constant fact of nature
D. Productive theory
Right Answer: A. Theory
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In seeds rich in lipids such as castor bean and Soya beans glyoxysomes are sites for break down of fatty acids into?
A. Fumarate
B. Malonate
C. Oxalate
D. Succinate
Right Answer: D. Succinate
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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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At the point of junction of the three bones ilium, ischium, pubis a depression is known as?
A. Forrnen triosseum
B. Acetabulum
C. Coracoid
D. Acetabularia
Right Answer: B. Acetabulum
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In flowering plants, one form of parthenogenesis is called?
A. Climateric
B. Vernalisation
C. Apomixis
D. All of these
Right Answer: C. Apomixis
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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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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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Photosynthetic pigments are organized into clusters for efficient absorption & utilization of solar energy in thylakoids membranes are called?
A. Photosystem
B. ETC
C. Storage system
D. None of these
Right Answer: A. Photosystem
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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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Nitrogenous waste in bony fishes is?
A. Ammonia
B. Urea
C. Uric acid
D. All of these
Right Answer: B. Urea
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The most efficient respiratory system is present in?
A. Fishes
B. Amphibians
C. Reptiles
D. Birds
Right Answer: D. Birds
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In cockroach digestion of food is completed in?
A. Stomach
B. Ileum
C. Crop
D. Gizzard
Right Answer: A. Stomach
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Colloidal osmotic pressure of the blood, maintained by fibrinogen is about?
A. 75%
B. 25%
C. 0%
D. 100%
Right Answer: C. 0%
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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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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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The E. coli genome consist of ________base pairs.
A. 4,639,221
B. 4,639,421
C. 4,639,271
D. 4,639,771
Right Answer: A. 4,639,221
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Egg laying mammals are called?
A. Prototheria
B. Metatheria
C. Eutheria
D. None of these
Right Answer: A. Prototheria
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The earliest form of muscles to evolve and found throughout animal kingdom?
A. skeletal muscles
B. smooth muscles
C. cardiac muscles
D. Both b and c
Right Answer: B. smooth muscles
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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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The sequence of events which take place during the completion of one heart – beat is termed as?
A. A trial diastole
B. Ventricular diastole
C. Diastole
D. All of these
Right Answer: C. Diastole
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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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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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No of Fatty Acids in Phosphatidic Acid is?
A. 1
B. 2
C. 3
D. 4
Right Answer: B. 2
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The human genome is ________ times larger than any other genome sequenced so far.
A. 20
B. 25
C. 30
D. 35
Right Answer: B. 25
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In arthropods nitrogenous wastes are excreted in the form of?
A. Ammonia
B. Urea
C. Uric acid
D. All of these
Right Answer: C. Uric acid
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Which of the following is correct and complete sequence?
A. Genus, family, class
B. Family, class, Phylum
C. Genus, Family, order
D. Order, Phylum, Kingdom
Right Answer: C. Genus, Family, order
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Cube of 8 cocci is called?
A. Tetrad
B. Sarcina
C. Staphylococcus
D. Streptococcus
Right Answer: B. Sarcina
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The two centrioles usually placed ________ to each other.
A. Parallel
B. Anti parallel
C. At right angle
D. Both b and c
Right Answer: C. At right angle
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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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The algal partners in a lichen?
A. is vascular plant roots
B. is Root nodules
C. is Autotrophic algae
D. is parasitic
Right Answer: C. is Autotrophic algae
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In deoxyribose one oxygen is removed from Hydroxyl group at carbon no?
A. One
B. Two
C. Three
D. Four
Right Answer: B. Two
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Movement of water and solutes is negligible along the?
A. Symplast pathway
B. Apoplast pathway
C. Vacular pathway
D. Both b a & c
Right Answer: C. Vacular pathway
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The gene causing the white eye trait in Drosophila resides only on?
A. X-chromosome
B. Y-chromosome
C. Sex-chromosome
D. All of these
Right Answer: A. X-chromosome
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The pores through which water enters into spongocoel are known as?
A. Ostia
B. Osculum
C. Both a and b
D. None of these
Right Answer: A. Ostia
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The present goal of gerontology is to increase the?
A. Life span
B. Health spam
C. Strength of the individual
D. Both a and b
Right Answer: B. Health spam
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