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MDCAT Biology Online Test MCQs With Answers
Question # 1
Newly synthesized Large proteins are digested into small viral proteins by
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Host protease
Viral protease
Viral RT
Host pepsin
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Question # 2
A collection of related parts that function as a unit is called:
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Organ
Organism
System
Individual
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Question # 3
The living organism which can prepare their own food are:
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predators
parasites
producers
prey
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Question # 4
The average rainfall in desert ecosystem is:
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20 - 30 cm
20 - 40 cm
25 - 50 cm
14 - 35 cm
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Question # 5
Hemophilia is a ________ disease
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Heritable
Genetic
Nutritional deficiency
Both a and b
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Question # 6
Many enzymes are simply dissolved in the
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Nucleoplasm
Stroma of chloroplast
Cytoplasm
Matrix of mitochondria
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Question # 7
The study of relationship of a single population to its environment is called:
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Autecology
Synecology
Both a & b
None
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Question # 8
Allosteric enzymes have ___ major sites
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1
2
3
4
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Question # 9
A Crista is made of -------- membrane
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Lipoprotein
Glycoprotein
Nucleoprotein
Phospholipids
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Question # 10
Color blindness, haemophilia and gout form linkage group onj
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Chromosome 9
Chromosome 19
x-chromosome
y-chromosome
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Question # 11
The predeter and prey relationship is called as
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Predation
Animes
Parasitism
None of above
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Question # 12
Which of the following things were not collected by Darwin?
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Specimens of diverse faunas and floras of south America
South American fossils
13 types of finches
Turtles
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Question # 13
When Fructose form ring structure, It is
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6 Cornered
5 cornered
4 cornered
3 cornered
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Question # 14
Which are pioneers of terrestrial ecosystem
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Dermatocarpons
Parmelia
Polytrichum
None of these
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Question # 15
Which characteristic is common in both cnidarians and flatworms
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Digestive system with a single opening
Dorsoventrally flattened bodies
Radial symmetry
Flame cells
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Question # 16
Which of the following reaction is reverse of others
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Hydrolysis
Decondensation
Decomposition
Condensation
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Question # 17
Green plants are ______ trophic level
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First
Second
Third
Forth
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Question # 18
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 # 19
The succession which occurs in dry soil or rock is
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Hydrosere
Xerosere
Decrosere
All of these
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Question # 20
Biotic components includes all the
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Nonliving components
Living components
Nonliving and living both
None of these
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Question # 21
Monoculture is
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One organism
A lab culture
A pure culture
Both b and c
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Question # 22
The synecology is also termed as
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Community ecology
Population ecology
Specie ecology
All of above
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Question # 23
Give an example of transport across cell membrane using energy
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Endocytosis and exocytosis
Reabsorption of Na+ from ascending loop of Henle
Reabsorption of water from collecting duct
All
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Question # 24
There is an association between two organisms, which brings benefits to both the organisms
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Predation
Symbiosis
Parasitism
None of above
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Question # 25
Nutrient elements become the part of protoplasm during
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Photosynthesis
Decomposition
Fixation
Assimilation
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Question # 26
F. Sanger was the first scientist who determined the ___ structure of a protein molecule
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Primary
Secondary
Tertiary
Quaternary
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Question # 27
Modern man has been on this planet for about
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4000 years
400,000 year
40,000 years
50,000 years
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Question # 28
Biosphere is spread out over the surface of planet earth extending about:
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2/4 km
4/6 km
6/8 km
8/10 km
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Question # 29
Which of the following helps in recognition of substrate
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Active site
Catalytic site
Binding site
All
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Question # 30
Gene pool consists of all alleles at all gene loci in all individuals of the:
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community
species
population
family
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Question # 31
Which of the following is Koshland model
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Active site is rigid
Active site may be molded to précised shape
Position of active site is moveable
None
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Question # 32
Which of the following is not an enzyme of HIV
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Reverse transcriptase
Integerase
Protease
Ligase
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Question # 33
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 # 34
Due to the trampling of the soil layer by the hooves of grazing animals the rain water will:
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Penetrate deep into the soil
Not penetrate this soil
Stop on the soil
Do not affect this layer of the soil
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Question # 35
What is cause of Eutrophication
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Excreta
Phosphate
Nitrates
All
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Question # 36
The change in frequency of alleles at a locus that occurs by chance is called :
Choose an answer
genetic drift
genetic change
gene mutation
gene frequency
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Question # 37
Resting membrane potential of a neuron is
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50mV
-70mv
-80mV
90mV
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Question # 38
Global warming is due to
Choose an answer
CFC's
SO
2
O
3
depletion
CO
2
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Question # 39
Nitrogen makes up ______ percent of the gases in atmosphere
Choose an answer
76
77
78
98
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Question # 40
The abiotic components are also termed as
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Chemical factors
Physical factors
Biological factors
A and B
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Question # 41
The animal that is caught and eaten is called:
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Prey
Host
Victim
Quarry
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Question # 42
Consumers
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Are primarily animals that obtain energy directly or indirectly from producers
Are primarily bacterial organisms that obtain energy directly or indirectly from producers
Are secondary animals that obtain energy directly or indirectly from producers
Are secondary plants that obtain energy directly or indirectly from producers
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Question # 43
All of the following are present in mitochondria, EXCEPT
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Cristae
Ribosomes
DNA
Thylakoids
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Question # 44
The term ecology comes from the Greek words Oikos, meaning "the family household" and logy (logos) meaning:
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The study of
Living
Building
Niche
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Question # 45
A heterrozygote offspring quantitatively exceeds the phenotypic expression of both the homozygote parents due to:
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dominance
incomplete dominance
over dominance
codominance
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Question # 46
The parasite that live outside the body of the host is called as
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Endoparasite
Ectoparasite
Outer parasite
All of above
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Question # 47
Which of the following is not a biotic component
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Producers
Consumers
Decomposers
Water
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Question # 48
Enzymes cannot work in which of the following
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Aqueous medium
Dry medium
Acidic medium
Alkaline medium
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Question # 49
The type of association between two organisms, which brings benefit to both the organisms is called
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Commensalism
Predation
Mutualism
Parasitism
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Question # 50
Glyosidic bond is formed by the
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Removal of Oxygen
Addition of Water
Addition of Oxygen
Removal of Water
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Question # 51
Primary succession that starts on a dry habitat is called:
Choose an answer
Hydrosere
Derosere
Xerosere
Aquasere
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Question # 52
Insulin receptors are present in
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Cytoplasm of muscle cells
Cell membrane of liver cells
Cell membrane of muscles and liver cells
Cell membrane of all body cells
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Question # 53
An animal that preys other animals is a
Choose an answer
Predator
Carnivore
Consumer
All
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Question # 54
The particles which do not contain any nucleic acid are
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Viruses
Prions
Viroids
All
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Question # 55
What are chances for having Rh-ve baby if one parent is Rh+ve and (homozygous) and other is Rh-ve
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25%
50%
100%
0%
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Question # 56
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 # 57
A change in one or more bases of DNA, which results in the formation of an abnormal protein is
Choose an answer
Moulting
Transformation
Mutation
Fission
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Question # 58
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 # 59
The essential requirement for life is:
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Minerals
Water
Carbohydrates
Proteins
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Question # 60
The ecosystem present on land or soil is called
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Terrestrial ecosystem
Lithospheric ecosystem
A and B
None
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Question # 61
Which of the following nitrogenous base have methyl group
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Adenine
Guanine
Uracil
Thymine
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Question # 62
In littoral zone, the zooplanktons are:
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Protozoan and coelenterates
Protozoan and porifers
Protozoan and flatworms
Protozoan and crustacean
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Question # 63
Ribozyme is found in
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Mitochondria
Cytoplasm
Lysosomes
Ribosomes
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Question # 64
Which one of following structures is formed from mesoderm?
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Intestinal lining
Muscles
Skin
Brain
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Question # 65
Green, plants are basically:
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Producers
Consumers
Decomposers
None of these
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Question # 66
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 # 67
Which of the following cross is carried to check the genotype fo an individuals showing a dominant phenotype ?
Choose an answer
Check cross
Test Cross
Criss Cross
Self Cross
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Question # 68
Potentially damaging enzymes are produced in
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Active form
Inactive form
Abundant quantity
Minor quantity
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Question # 69
Following substances can act as inhibitors, except
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Cyanide
Antimetabolites
Antibodies
Poisons
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Question # 70
Passage through the pores in nuclear envelope is restricted preliminary to
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Proteins, RNA and protein-RNA complexes
Lipids and Glycolipids
DNA and RNA
Glycoproteins
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Question # 71
An association between certain fungi and the roots of plants growing in acid soil is:
Choose an answer
Lichens
Predation
Mycorrhiza
Commensalism
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Question # 72
The symbiotic relationship in which both the partners get benefit is:
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Parasitism
Commensalism
Predation
Mutualism
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Question # 73
Parasitism is an association between a host and a parasite, which ivolves providing the parasite with:
Choose an answer
Food
Protection
Conditions for its survival
All a, b, c
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Question # 74
Most nitrogen moves from the soil into the roots in the form of:
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Nitrogen gas
Nitrites
Ammonia
Nitrates
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Question # 75
The deficiency of which one of the following is cause of goiter
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Iodine
Calcium
Potassium
Iron
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Question # 76
Macronutrients are required by the organisms in:
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Small amount
Large amount
Traces
Never required
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Question # 77
Overgrazing resulted in
Choose an answer
Diminishing the grasses
Desert
Barren land
All of these
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Question # 78
Moss stage is represented by
Choose an answer
Polytrichum
Tortula
Adiantum
Both a and b
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Question # 79
The study of relationship of an organism to their environment is knows as:
Choose an answer
biology
ecology
zoology
mycology
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Question # 80
Regulation of hunger and menstrual cycle is controlled by
Choose an answer
Cerebrum
Thalamus
Hypothalamus
Pons
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Question # 81
A symbiotic association between a fungus and the roots of higher plants is known as
Choose an answer
Lichen
Parasitism
Mycorrhiza
Commensalism
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