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MDCAT Biology Online Test MCQs With Answers
Question # 1
The processes that have transformed life on earth from its earliest forms to the vast diversity that we observe today, are collectively referred as
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Evolution
Succession
Revolution
All of above
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Question # 2
Digestive vacuoles are also called as
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Primary Lysosomes
Secondary Lysosomes
Phagocytic Vacuoles
Pinocytic Vacuoles
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Question # 3
Regional ecological community of plants & animals primarily determined by climate
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Biome
Niche
Habitat
Both b & c
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Question # 4
Which one of the following phylum is the example of coelomates
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Flatworms
Round worms
Segmented worms
Unsegmented worms
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Question # 5
In deuterostomes mesoderm is derived from wall of developing
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Coelom
Heart
Archenteron
Blastopore
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Question # 6
The ecosystem consists of interacting components,
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Biotic
Abiotic
Bioic and Abiotic
None of these
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Question # 7
Ozone is present at about ________ km above earth
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5 -10
10 - 20
10 - 40
10 - 50
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Question # 8
Which region of the nucleolus has DNA?
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Central fibrillar region
Central granular region
Peripheral granular region
Peripheral fibrillar region
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Question # 9
Features of most complex animals are
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Triploblastic with true coelom
Triploblastic with pseudocoelom
Triploblastic with bilateral symmetry
Triploblastic with radial symmetry
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Question # 10
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 # 11
Potentially damaging enzymes are produced in
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Active form
Inactive form
Abundant quantity
Minor quantity
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Question # 12
Inorganic ions can play a role of ¬¬¬¬¬¬¬______ in enzyme catalysis
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Coenzyme
Inhibitor
Apo enzyme
Cofactor
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Question # 13
Animal cells differ from plant cells in having
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80 S ribosome
Chloroplasts
Mitochondria
Centrioles
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Question # 14
The change in frequency of alleles at a locus that occurs by chance is called :
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genetic drift
genetic change
gene mutation
gene frequency
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Question # 15
The establishment of stable vegetation on an area is termed as
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Plant succession
Animal succession
Succession
All of the above
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Question # 16
Synaptic vesicles are present in synaptic knob that is part of
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Post synaptic neuron
Pre synaptic neuron
Both neurons
Second neuron
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Question # 17
The biotic components of the ecosystem are the
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Producers
Consumers
Producers,consumers and the decomposers
Decomposers
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Question # 18
In coniferous alpine and boreal forest the temperature ranges from:
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0°C to 10°C
Below freezing point up to 10°C
Below freezing point up to 15°C
0°C to 15°C
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Question # 19
Abiotic factors include:
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Geomagnetism
Gravity
Water
All these
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Question # 20
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 # 21
Parasitism is an association between a host and a parasite, which ivolves providing the parasite with:
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Food
Protection
Conditions for its survival
All a, b, c
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Question # 22
Pyramid always starts at
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T
1
T
2
T
3
T
4
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Question # 23
Omnivores are described by how many trophic levels
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Any 2
Any 3
Any 1
Primary & any higher
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Question # 24
The rate of enzyme action will be minimum at
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Optimum pH
Optimum temperature
Optimum conditions
Maximum temperature
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Question # 25
Genome of the acellular particle mainly comprised of
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Protein
Sugars
Lipid
Nucleic acid
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Question # 26
Urine is preferably used as a vehicle for biotechnology product than:
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Blood
Milk
Plasma
Tissue fluid
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Question # 27
A group of animals with distinct germinal layers in adult stage are grouped in
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Cnidaria
Arthropoda
Aschelminthes
Platyhelminthes
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Question # 28
Lichens are dual organisms composed of symbiotic association of algae living within a fungus:
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Mycelium
Sporangium
Hyphae
Rhizophore
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Question # 29
Primary succession that starts on a dry soil or rock is called:
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Hydrosere
Derosere
Xerosere
Aquasere
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Question # 30
The dominance relations of a 4 O'clock plant can be described in terms of
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Complete dominance
Incomplete dominance
Partial dominance
Both B and C
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Question # 31
Highest degree of regeneration is present in sponges because of
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Undifferentiated cells
Simplest organization
Ability to reproduce
Absence of germ layers
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Question # 32
Layer of earth where life is present is called
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Hydrosphere
Lithosphere
Biosphere
Topography
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Question # 33
The study of relationship of an organism to their environment is knows as:
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biology
ecology
zoology
mycology
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Question # 34
Major cells infected by HIV are
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Monocytes
B lymphocytes
T lymphocytes
RBC
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Question # 35
A short food chain of two or three links supports a community:
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Efficiently
More efficiently
Inefficiently
Less efficiently
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Question # 36
The symbiotic relationship in which both the partners get benefit is:
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Parasitism
Commensalism
Predation
Mutualism
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Question # 37
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 # 38
Rh factor is encoded by
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2 genes which occupy 3 loci
3 genes which occupy 2 loci
2 genes which occupy 2 loci
3 genes which occupy 3 loci
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Question # 39
What is trampling
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Eating grasses to roots
Nipping leaves
Overgrazing
Putting pressure on soil to make it compact
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Question # 40
The major unit of ecology is:
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Biosphere
Ecosystem
Community
Population
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Question # 41
Which of the following part of virus does not enter into host cell
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Envelope
Spikes
Both
Capsid
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Question # 42
Decrease in progesterone level in blood stimulates the secretion of
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Estrogen
FSH
Cortisol
Oxytocin
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Question # 43
Change in temperature from 30o C to 40o C in human body will cause ____ in rate of reaction
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Increase
Decrease
First increase then decrease
First increase then constant
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Question # 44
X and Y linked genes are also called as :
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Sex genes
Dominant genes
Autosomal genes
Pseudoautosomal genes
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Question # 45
Which of the following cross is carried to check the genotype fo an individuals showing a dominant phenotype ?
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Check cross
Test Cross
Criss Cross
Self Cross
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Question # 46
Nutrients required by organisms in small quantity or in trace amount like zinc, molybdenum, iron, iodine are:
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Macronutrients
Micronutrients
Mega Nutrients
Both a & c
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Question # 47
Enzyme works to its maximum capacity
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At high temperature
At low temperature
At moderate temperature
At optimum temperature
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Question # 48
The succession started on bare area is called as
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Primary succession
Secondary succession
Tertiary succession
Quartnary succession
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Question # 49
Which of the following is not true about biotic components
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Producers
Consumers
Decomposers
Atmosphere
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Question # 50
Genes can be mapped on chromosomes on the basis of
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Sex linkage
Assortment
Recombination frequency
Gene sequencing
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Question # 51
--------- Develop the basic formwork of plasma membrane:
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Phospholipids
Glycoproteins
Glycolipids
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Question # 52
Nutrient elements become the part of protoplasm during
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Photosynthesis
Decomposition
Fixation
Assimilation
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Question # 53
Any ecosystem is made up of three components like:
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Producers, consumers, and predators
Producers, consumers and grazers
Producers, consumers and decomposers
Producers, grazers and composers
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Question # 54
The smallest known virus is
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HIV virus
HBV virus
Influenza virus
Polio virus
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Question # 55
The gill pouches present in embryos of mammals :
Choose an answer
support that ontogeny recapitulates phylogeny
homologous structures
used by embryos to breathe
evidence for the degeneration
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Question # 56
In case of sickle cell anemia, in place of glutamic acid, _________ is found
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Histidine
Valine
Proline
Leucine
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Question # 57
The relationship between insects and flowering plants is the example of:
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Commensalism
Mutualism
Predation
Parasitism
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Question # 58
Tritanopia is blindness of :
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Red Colour
Green Colour
Blue Colour
Pink Colour
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Question # 59
The animals which feed on grasses are called:
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Grassers
Browsers
Grazers
Grazophytes
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Question # 60
Dams and canal networks developed for irrigation purpose in Pakistan and many other countries create the problems of
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Salinity and soil erosion
Salinity and water logging
Soil depletion and water erosion
Soil erosion and depletion
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Question # 61
Grassland which do not have woody plants are called:
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Savana
Tundra
Prairies
Boreal
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Question # 62
Predation is a process of
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Prey
Predator
Prey and predator
None of these
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Question # 63
Global warming is due to
Choose an answer
CFC's
SO
2
O
3
depletion
CO
2
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Question # 64
Biosphere is a thin layer of ______ in which all living organism exist
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Earth
Air
Space
None of above
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Question # 65
The relationship in which only one organism benefit from the relationship. The other is not affected at all.
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Parasitism
Commensalism
Predation
Mutualism
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Question # 66
Degenerated testes are present in abdomen in which of these cases
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Down's syndrome
Klinefelter's sysndrome
Turner's syndrome
Testicular ferminization
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Question # 67
In a phospholipid molecule, fatty acid is attached to the carbon number_____ of glycerol.
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1
2
Both
3
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Question # 68
Interaction of two loci
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Pleiotropy
Epistasis
Dominance
Differentiation
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Question # 69
Nucleus is visible when the cell is in ____ stage
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Non-dividing
Dividing
active
Both a and b
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Question # 70
Pick up the example of a dinucleotide:
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ATP
GTP
ADP
NAD
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Question # 71
Succession starting in pond is called
Choose an answer
Hydrosere
Xerosere
Pioneers
None of these
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Question # 72
Pick up the wrong statement from the following
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Oils are lighter than water
Animal fats are solid at room temperature
Specific gravity of fats is higher than water
Fats containing saturated fatty acids are solid
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Question # 73
Bacterial and fungi are mainly included in the group of
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Consumers
Decomposers
Producers
None of these
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Question # 74
Which one of the following does not refer to mutialism
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Mycorrhiza
Parasitism
Lichen
Bacteria in the gut of cow
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Question # 75
Food chains combine to form
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Large food chain
Large organisms
Trophic levels
Food web
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Question # 76
Monoculture is
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One organism
A lab culture
A pure culture
Both b and c
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Question # 77
An association between two organisms, which brings benefit to both the organisms is called:
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Parasitism
Commensalisms
Predation
Symbiosis
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Question # 78
Methylation of proteins occur in
Choose an answer
Transport vesicles of endoplasmic reticulum
Lysosomes
Golgi apparatus
Transport vesicles of Golgi bodies
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Question # 79
The first person who argued from evidence that species were not created in their present form rather they had evolved from ancestral species was
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Aristotle
Lamarck
Darwin
Mendel
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Question # 80
When Fructose form ring structure, It is
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6 Cornered
5 cornered
4 cornered
3 cornered
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Question # 81
Nerve which carries impulses from CNS to effectors
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Sensory
Inter
Motor
Associative
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