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 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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Only one pair of chromosome is present in?
A. Ferns
B. Mosquito
C. Penicillium
D. Sugarcane
Right Answer: C. Penicillium
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The most fragile of all biome is?
A. Temperature decedious forest
B. Tundra ecosystem
C. Desert ecosystem
D. Grass land ecosystem
Right Answer: B. Tundra ecosystem
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Most fossils are found in?
- Sedimentary rocks
- Modern rocks
- Ignitious rocks
- All of above
Right Answer: Sedimentary rocks
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No of ATP produced by one reduced NAD is?
A. 1
B. 2
C. 3
D. 4
Right Answer: C. 3
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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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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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Which of the following phylum is exclusively marine?
A. Porifer
B. Nematoda
C. Echinodermata
D. Annelida
Right Answer: C. Echinodermata
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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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Today crop production is limited by effects of Salinization at about?
A. 30%
B. 40%
C. 50%
D. 60%
Right Answer: C. 50%
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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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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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Poly siphonia is an example of?
A. Chloroplyta
B. Euglenophyta
C. Dino flagellates
D. Rhodophyta
Right Answer: D. Rhodophyta
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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 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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Twins produced from a single fertilized egg are known as?
A. Identical
B. Fraternal
C. Both a and b
D. None of these
Right Answer: A. Identical
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True statement about lung cancer is?
A. 75% caused by smoking
B. 85% caused by smoking
C. 80% caused by smoking
D. 90% caused by smoking
Right Answer: D. 90% caused by smoking
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According to _________ active site is a rigid structure.
A. Induce fit model
B. Lock & key model
C. Fluid musaie model
D. Both and b
Right Answer: B. Lock & key model
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The chief structural and functional units of the nervous system are?
A. Neuroglia
B. Neurons
C. Schwann cells
D. Both a and b
Right Answer: B. Neurons
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During surgery antithrombin III is used to prevent?
A. Blood loss
B. Blood clotting
C. Blood agglutination
D. Hemolysis
Right Answer: B. Blood clotting
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Which of the following statement is correct about MYSOPLASMS?
A. Largest bacteria
B. Cell wall is absent
C. Smallest bacteria
D. Both b and c
Right Answer: D. Both b and c
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A team of Japanese scientists is working on introducing the C4 photosynthetic pathway into?
A. Corn
B. Wheat
C. Rice
D. Cotton
Right Answer: C. Rice
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The structure that prevents the food from entering the nasal cavities is?
A. Epiglottis
B. Soft palate
C. Pharynx
D. Tongue
Right Answer: B. Soft palate
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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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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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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 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 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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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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“Minimal” medium does not contain?
A. Ammonia
B. Salts
C. Few vitamins
D. Nucleoproteins
Right Answer: D. Nucleoproteins
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The chaetae are absent in?
A. Nereis
B. Stylaria
C. Hirudo
D. All of these
Right Answer: C. Hirudo
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The ribosomes are attached to mRNA through _________ ribosomal subunit.
A. Large
B. Small
C. Both a and b
D. None of these
Right Answer: B. Small
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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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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 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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Which of the following factor cannot change the gene frequency?
- Migration
- Inbreeding
- Selection
- Random fertilization
Right Answer: Random fertilization
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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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What is the diameter of skeletal muscle fiber
A. 10-100 μ m
B. 1-2 μ m
C. 16 nm
D. 7-8 μ m
Right Answer: A. 10-100 μ m
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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 ascospores in each Ascus is?
A. Two
B. Four
C. Eight
D. Ten
Right Answer: C. Eight
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Familial hypercholesterolemia patients lack receptors for removing cholesterol from blood on?
A. Acinar cells
B. Hepatocytes
C. Renel epithelium
D. Both a and b
Right Answer: B. Hepatocytes
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Non-surgical removal of kidney stone is?
A. Dialysis
B. Lithotripsy
C. Uremia
D. None of these
Right Answer: B. Lithotripsy
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Axons are?
A. usually carry impulse towards the cell body
B. few millimeter to several meters in lenth in brain
C. contain mitochondria only
D. cytoplasmic processes
Right Answer: D. cytoplasmic processes
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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 of the following is a genetic disorder?
A. Lecuaemia
B. Thalassaemia
C. Oedema
D. Cyanosis
Right Answer: B. Thalassaemia
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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 oldest known fossils are?
- Dipnoi
- Bacteria
- Archaeopteryx
- Prokaryotes
Right Answer: Prokaryotes
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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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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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What is the correct route of urine from kidneys to out of body?
A. Pelvis → Urinary bladder → urethra
B. Pelvis → Urinary bladder → urethra → through penis in males
C. Pelvis → ureter → urethra → through vagina in females
D. Pelvis → ureter → urinary bladder → urethra
Right Answer: C. Pelvis → ureter → urethra → through vagina in females
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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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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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The process of evolution f leaf was show and gradual which completed n more than?
A. 10 – 20 million years
B. 15 – 20 million years
C. 10 – 25 million years
D. 15 – 25 million years
Right Answer: B. 15 – 20 million years
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Blood is not involved in the transported of gases in?
A. Cockroach
B. Earthworm
C. Frog
D. None of these
Right Answer: A .Cockroach
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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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Glyceraldeyde is a?
A. Triose
B. Tetrose
C. Pantose
D. Hexose
Right Answer: A. Triose
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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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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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Excessive use of green vegetables and tomatoes may be the source of?
A. Hyperoxaluria
B. Hypercalcemia
C. Both a and b
D. None of these
Right Answer: A. Hyperoxaluria
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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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What is COLLAGEN?
A. Carbohydrate
B. Protein
C. Lipid
D. None
Right Answer: B. Protein
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Glycolate produced during photorespiration enters into?
A. Peroxisomes
B. Glyoxisomes
C. Mitochondria
D. None of these
Right Answer: A. Peroxisomes
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Kind of RNA present in least amount?
A. m – RNA
B. t – RNA
C. r – RNA
D. None of these
Right Answer: A. m – RNA
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A full set of genes of an individual is known as?
A. Genomic library
B. Genome
C. Genotype
D. Karyotype
Right Answer: B. Genome
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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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Adjustment in the body postures to economize heat loss and heat gain is?
A. Structural adaption
B. Physiological adaption
C. Behavioral adaption
D. All of these
Right Answer: C. Behavioral adaption
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Site for gaseous exchange in respiration system of man is?
A. Bronchioles
B. Bronchi
C. Alveoli
D. All of these
Right Answer: C. Alveoli
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Who for the first time found white eye mutant in Drosophila?
A. Morgan
B. Brifges
C. Correns
D. De Varies
Right Answer: B. Bridges
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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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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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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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An unbroken series of species arranged in ancestor to descendant sequence with each later species having evolved from one that immediately preceded is called?
A. Food chain
B. Food web
C. Biosphere
D. Phyletic lineage
Right Answer: D. Phyletic lineage
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Lamarck published his theory of evolution in?
- 1822
- 1812
- 1817
- 1809
Right Answer: 1809
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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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What are the products of cyclic phosphorylation?
A. ATP
B. NADPH & ATP
C. ATP, NADPH & OXYGEN
D. None of these
Right Answer: A. ATP
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Each successional stage of community is known as?
A. Success stage
B. Complete stage
C. Seral stage
D. All of these
Right Answer: C. Seral stage
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Which of the following statement about the heart of fishes is correct?
A. Oxygenated blood enters and leaves the heart
B. deoxygenated blood enters and leaves the heart
C. Oxygenated blood enters and deoxygenated blood leaves the heart
D. deoxygenated blood enters and oxygenated blood leaves the heart
Right Answer: B. deoxygenated blood enters and leaves the heart
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No of tubules present in a centriole is?
A. 27
B. 9
C. 3
D. 54
Right Answer: A. 27
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All protozoans are?
A. Colonial
B. Unicellular
C. Simple multicellular
D. All of these
Right Answer: B. Unicellular
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Open growth is found in?
A. Plants
B. Evolved animals
C. Lower animals
D. All of these
Right Answer: A. Plants
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In which phase of menstrual cycle progesterone is released from corpus Luteum.
A. Proliferative phase
B. Secretory phase
C. Menstruation phase
D. None of these
Right Answer: B. Secretory phase
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Wave of blood pressure or pulse due to heartbeat can be defected in?
A. Arteries
B. Veins
C. Capillaries
D. All of these
Right Answer: A. Arteries
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The complete mature and infectious particle is known as?
A. Pirion
B. Virion
C. orf virus
D.Both a and c
Right Answer: B. Virion
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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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In bacteria nuclear region is visible in the light microscope after staining with?
A. Safranin stain
B. Malacoid Green stain
C. Crystal violet stain
D. Feulgen stain
Right Answer: D. Feulgen stain
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A tiny hair like trigger, projection outside is known as?
A. Helix
B. Cnidoblasts
C. Cnidocil
D. Crindostyles
Right Answer: C. Cnidocil
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Which of the following technique astronauts can use for growing vegetables?
A. Tissue culture technique
B. Hydroponic culture technique
C. Colning
D. Integrated disease management
Right Answer: B. Hydroponic culture technique
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The disease caused by low calcium level in the blood is?
A. Cramp
B. Tetany
C. Muscles fatigue
D. both a and b
Right Answer: B. Tetany
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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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Which one of the following is a kind of chemical link b/w catabolism and anabolism?
A. NAD
B. NADPH2
C. ATP
D. FAD
Right Answer: C. ATP
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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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A shipworm damages wooden parts of the ship is?
A. Teredo
B. Ostrea
C. Loligo
D. Mytilus
Right Answer: A. Teredo
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If tuft to flagella is present only at one pole of bacteria then these are?
A. Amphitrichous
B. Peritrichous
C. Lophotrichous
D. Mono trichous
Right Answer: C. Lophotrichous
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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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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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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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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 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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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 type of nephron is specifically instrumental in the production of concentrated urine?
A. Cortical
B. Juxta medullary
C. Both a & b
D. None of these
Right Answer: B. Juxta medullary
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