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MDCAT Biology Online Test MCQs With Answers
Question # 1
Which eat consumers
Choose an answer
Predators
Carnivores
Omnivores
All
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Question # 2
Which are pioneers of terrestrial ecosystem
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Dermatocarpons
Parmelia
Polytrichum
None of these
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Question # 3
Lichen is the example of
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Mutualism
Commenaslim
Parasitism
All of above
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Question # 4
The study of different communities (grouping of population) in relation to their environment is called
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Autecology
Synecology
Ecology
Biogeopraphy
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Question # 5
Which oxides causes headache and brain damage
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Nitrogen
Lead
CO
2
CO
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Question # 6
In hydrospheric ecosystem the exchange material and transfer of energy takes place.
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Within water and air
Within water and land
Within water
Within land and air
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Question # 7
Both Glycoprotein and glycolipids are components of
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Plant Cell walls
Algal Cell Walls
Fungal Cell Wall
Biological Membranes
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Question # 8
In temperature deciduous forest the average rainfall is:
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650 -1500 mm
750 -1500 mm
800 - 1600 mm
700 - 1500 mm
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Question # 9
Which is not the function of glucagon
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Glycogen hydrolysis
Lipolysis
Gluconeogenesis
Protein synthesis
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Question # 10
The predeter and prey relationship is called as
Choose an answer
Predation
Animes
Parasitism
None of above
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Question # 11
Insect and flower relationship is the example of
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Mutualism
Commensalism
Parasitism
All of above
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Question # 12
"Litho" means
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Air
Earth / soil
Water
All of these
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Question # 13
Lices and mosquitoes are the examples of
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Endoparasite
Ectoparasite
Outer parasite
All of above
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Question # 14
The organelle that protect the cell from invading organisms is
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Centriole
Lysosome
Mitochondrion
Vacuole
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Question # 15
This is not the part of neuron
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Axon
Dendron
Nissl’ granules
Synapse
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Question # 16
Mutatuons are inherited only if they occur in the
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Gland cells
Gametes
Muscle cells
Somatic cells
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Question # 17
Several bacteria in soil are able to oxidize ammonia or ammonium ions, this oxidation is known as:
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Ammonification
Nitrification
Denitrification
Amino-oxidation
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Question # 18
Plants like cacti store their water in large:
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Collenchyma tissues
Mesenchymal tissues
Parenchyma tissues
Epidermal tissues
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Question # 19
The correct sequence in a food chain is
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Mice - green plants - snake - hawke
Green plants - mice - snake - hawk
Mice - snake - green plants - hawk
Green plants - hawk - snake - mice
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Question # 20
In temperate grassland the rate primary production is about:
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700 - 1400 g/m
2
700 - 1600 g/m
2
700 -1800 g/m
2
700 - 1500 g/m
2
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Question # 21
Major regional ecological community of plants and animals forms:
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Triomes
Biosphere
Biomes
Biogeography
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Question # 22
When bacteria in soil oxidize ammonia or ammonium ions this is called:
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Oxidation
Denitrification
Ammonification
Nitrification
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Question # 23
Chemical formula of pentose sugar present in DNA
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C
5
H
9
O
5
C
5
H
10
O
5
C
5
H
10
O
4
None
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Question # 24
Bacterial live and get food from roots of plants is an example of
Choose an answer
Symbiosis
Mutualism
Parasitism
Infestation
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Question # 25
Soil nitrogen resources are also strengthened by the addition of ______ by the man himself
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Nitrogen fertilizers
Nitrogen
Fertilizers
None of above
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Question # 26
The compound formed by the combination of a base and a pentose sugar is called:
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Nucleoside
Nucleic acid
Nucleotide
Nuclein
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Question # 27
The body of a Hydra can be divided in two equal halves vertically in
Choose an answer
One plane only
Two planes
Three planes
Any plane
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Question # 28
According to Darwin descent with modification means
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Same ancestor
Same characters
Different ancestors
Different characters
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Question # 29
Glycine can be converted to alanine by
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Addition of carbon and 2 hydrogens
Removal of carbon and 2 hydrogens
Addition of Methyl group
Removal of hydrogen and 2 carbons
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Question # 30
About ______% of solar energy is used to evaporate water, heat up soil and then lost to the outer space
Choose an answer
95
97
98
99
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Question # 31
Platyhelminthes have
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Asymmetrical body
Radial symmetry
Bilateral symmetry
Diploblastic organization
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Question # 32
The study of the relationship of animals to environment is called:
Choose an answer
Biology
Ecology
Microbiology
Zoology
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Question # 33
Example of a virus having tadpole shape consisted of head and tail
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Bacteriophage
Polio virus
HIV
HV
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Question # 34
Biosphere is spread over the surface of plant earth, extending upto:
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8 to 10 km
5 to 6 km
10 to 20 km
8 to 16 km
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Question # 35
If substrate concentration is unlimited, rate of enzyme action becomes
Choose an answer
Inversely proportional to enzyme concentration
Directly proportional to enzyme concentration
Directly proportional to substrate Concentration
Inversely proportional to substrate
Concentration
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Question # 36
Aerosol spray foams are potential sources of
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Carbon monoxide
Sulphur dioxide
Chlorofluorocarbons (CFCs)
Lead compounds
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Question # 37
Grazing is important
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To maintain the population of competitors
To maintain the population of grasses
To maintain the vigor of grasses
All of these
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Question # 38
All food chains and food webs begin from
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Consumers
Green plants
Fungi and bryophytes
Dead organic matter
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Question # 39
The chemical elements essential for life in living organisms are called ______ elements
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Biogenic
Abiogenic
Nutrient
Both A and C
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Question # 40
An animal which captures and readily kills living animals for its food is known as
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Parasite
Predator
Scavenger
Consumer
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Question # 41
Tundra ecosystem is a vast treeless region bordering the:
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Pacific ocean
Atlantic ocean
Arctic ocean
Arabian sea
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Question # 42
The best known phages are T phages that infect
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Pseudomonas
Mycoplasma
Escherichia Coli
Salmonella
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Question # 43
How many number of autosomal chromosome pairs are present in human
Choose an answer
22
33
44
46
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Question # 44
Slight change in pH can cause
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Denaturation
Crystallization
Ionization
All
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Question # 45
Which of the following reaction is reverse of others
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Hydrolysis
Decondensation
Decomposition
Condensation
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Question # 46
Predation is a process of
Choose an answer
Prey
Predator
Prey and predator
None of these
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Question # 47
The attachment of shark and small fish remoras is an example of:
Choose an answer
Mutualism
Parasitism
Predation
Commensalism
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Question # 48
In a phospholipid molecule, fatty acid is attached to the carbon number_____ of glycerol.
Choose an answer
1
2
Both
3
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Question # 49
The oxidation of ammonia is
Choose an answer
Ammonification
Nitrogen fixation
Nitrification
Denitrification
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Question # 50
Give an example of transport across cell membrane using energy
Choose an answer
Endocytosis and exocytosis
Reabsorption of Na+ from ascending loop of Henle
Reabsorption of water from collecting duct
All
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Question # 51
Secondary structure is the ultimate structural level of which of the following proteins?
Choose an answer
Trypsin
Insulin
Keratin
Glucose
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Question # 52
Radial symmetry is present in
Choose an answer
Adults of annelida
Adults of echinodermata
Adults of Cnidaria
Both B and C
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Question # 53
Homogenetistic acid is oxidized rapidly when exposed to air, turning the urine
Choose an answer
White
Purple
Blue
Black
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Question # 54
The study of relationship of an organisms to their environment is known is
Choose an answer
Biology
Ecology
Zoology
Mycology
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Question # 55
Retroviruses cause tumors in
Choose an answer
Rodents
Fowls
Cats
All
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Question # 56
Diabetes is the leading cause of
Choose an answer
Kidney failure
Adult blindness
Heart disease
All of these
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Question # 57
Decrease in progesterone level in blood stimulates the secretion of
Choose an answer
Estrogen
FSH
Cortisol
Oxytocin
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Question # 58
A process in which one organism get benefit from the relationship is known as
Choose an answer
Grazing
Commensalism
Symbiosis
Mutualism
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Question # 59
Snails are the intermediate hosts of
Choose an answer
Fasciola hepatica
Schistoma
Taenia solium
Ancyclosoma duodenale
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Question # 60
The two linked genes A and B with a 30% recombination frequency must be
Choose an answer
15 units apart
30 units apart
60 units apart
90 units apart
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Question # 61
------------------- are the autotrophs that capture and bring light energy into ecosystem
Choose an answer
Decomposers
Algae
Producers
None o these
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Question # 62
Which of the following is always an intracellular parasite
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Zooparasite
Viral parasite
Phyto parasite
Microbial parasite
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Question # 63
The productivity can be indicated by:
Choose an answer
Consumption of water and evolve of O
2
Consumption of CO
2
and water
Consumption of CO
2
and evolve of O
2
Consumption of minerals and evolve of N
2
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Question # 64
In sickle cell beta chain glutamic acid is replaced by valine which is sixth amino acid from
Choose an answer
N-Terminal
C-Terminal
R-Terminal
H-Terminal
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Question # 65
Topography is study of?
Choose an answer
Population
Individula
Earth
birds
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Question # 66
Resting membrane potential of a neuron is
Choose an answer
50mV
-70mv
-80mV
90mV
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Question # 67
In lytic cycle, the relationship between bacterium and bacteriophages is
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Symbiotic
Master-slave
Husband wife
Host-guest
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Question # 68
Which is incorrect about resting membrane potential
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Na+ ions are ten folds higher outside
2 Na+ move out for 3 K+ move in
K+ ions are twenty folds higher inside
Some k+ ions leak out
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Question # 69
Which of the following is an example of ribozyme
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Aminopeptidase
Pancreatic lipase
Peptidyl transferase
Cytochrome oxidase
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Question # 70
Mascara is a type of:
Choose an answer
Lion
Bird
Monkey
Bear
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Question # 71
Annual rainfall in grassland is about:
Choose an answer
250 to 650 mm
250 to 850 mm
250 to 450 mm
250 to 750 mm
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Question # 72
When Fructose form ring structure, It is
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6 Cornered
5 cornered
4 cornered
3 cornered
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Question # 73
Succinic acid dehydrogenase +succinic acid and high concentration of malonic acid?
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Maleic acid
Fumaric acid
No reaction
Oxalic acid
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Question # 74
Pick up the correct statement about the following figure:
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2.Nucleolus, 4.Golgi apparatus, 10.cytoplasm, 7.Mitochondria
2.Nucleolus, 7.cell membrane, 9.cytoplasm, 7.Mitochondria
2.Nucleolus, 4.Golgi apparatus, 5.cytoplasm, 7.Mitochondria
2.Nucleolus, 4.Golgi apparatus, 10.cytoplasm, 7.Centriole
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Question # 75
It is the study of the relationship of animals (organisms) to their environment
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Ecology
Ecosystem
Physiology
Mycology
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Question # 76
Primary succession that starts in a pond is called:
Choose an answer
Hydrosere
Derosere
Xerosere
Aquasure
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Question # 77
Primary consumers form ______ trophic level
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First
Second
Third
Forth
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Question # 78
Viral core always contain __ among the following
Choose an answer
DNA
RNA
Both A and B
Any of A or B
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Question # 79
Ribozyme is found in
Choose an answer
Mitochondria
Cytoplasm
Lysosomes
Ribosomes
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Question # 80
Phosphorylation of glucose molecule in glycolysis is carried out by
Choose an answer
ATPase
Kinase
Isomerase
Transferase
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Question # 81
A dominant plant of temperate deciduous forests is the :
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Euphorbia
Taxus baccata
cactus
Acacia
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