Question # 1

Much of nitrogen found in the soil is the result of:

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Degeneration

Decomposition

Denitrification

Assimilation

Which of the following is true about mesoglea

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Acellular

Mesodermal

Cellular

Multicellular

Biotic components includes all the

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Nonliving components

Living components

Nonliving and living both

None of these

Viruses reproduce through a process

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Binary fission

Replication

Both a and b

Transformation

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

Among the scientists who believed in divine creation as

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Darwin

Carolous Linnaeous

Lamarck

Wallace

The fourth trophic level includes the:

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Producers

Tertiary consumers

Secondary consumers

None of these

The major unit of ecology is the:

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Physical component

Biotic component

Ecosystem

Logos

In littoral zone, the zooplanktons are:

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Protozoan and coelenterates

Protozoan and porifers

Protozoan and flatworms

Protozoan and crustacean

Rh factor or antigen was first studied in

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Man

Owl

Monkey

Fish

Monoculture is

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One organism

A lab culture

A pure culture

Both b and c

In temperature deciduous forest the range of temperature is form:

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0∘C - 30∘C

4∘C - 30∘C

4∘C - 25∘C

4∘C - 40∘C

Population of Pakistan was ________ in 1947

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23.5 million

30 million

32.5 million

40 million

Glycerol, fatty acids and phosphoric acid give rise to:

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Phospholipid

Phosphatidic acid

Phosphatidyl choline

Phosphatidylethnoline

The relationship of a single population towards its environment is called

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Ecology

Synecology

Autoecology

All of foregoing

A process in which one organism get benefit from the relationship is known as

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Grazing

Commensalism

Symbiosis

Mutualism

Wallace developed a Theory of Natural Selection similar to that of

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Lamarck

Linnaeus

Darwin

Lyell

The processes that have transformed life an earth form 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

One mechanism of temperature regulation was developed by land plans and animals by developing.

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Brak and skin

Vascular tissues and circulatory system

Cambium and excretory system

Vascular tissue and respiratory system

Which of the following sugar is abundant in muscle fibres

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Myoglobin

Starch

Glycogen

Oxygen

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

How many number of autosomal chromosome pairs are present in human

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22

33

44

46

Myelin is made up of

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Nucleoprotein

Lipoprotein

Glycolipids

Glycoproteins

Elements required in large amount are called

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Micronutrient

Macronutrient

Organic elements

Inorganic elements

Lices and mosquitoes are the examples of

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Endoparasite

Ectoparasite

Outer parasite

All of above

Eagle may eat blue bird, but blue bird eats insects like caterpillar and caterpillar feeds on grass or green leaves. This is a ______

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Food chain

Food web

Both A and B

None of above

The gill pouches present in embryos of mammals :

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support that ontogeny recapitulates phylogeny

homologous structures

used by embryos to breathe

evidence for the degeneration

When living and non-living interact to produce a stable system in which exchange of materiel with flow of energy takes place, it forms a/an:

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environment

ecosystem

stable community

ecological succession

As the number of the predators decreases the numbering of prey:

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Decreases

Increases

Remain constant

Sometime increases sometime decrease

First invertebrate to develop a nervous system is

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Sponges

Cnidarians

Flat worms

Round worms

Interaction of two loci

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Pleiotropy

Epistasis

Dominance

Differentiation

Mutation of one or two N-bases is

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Inversion

Point mutation

Deletion

Chromosomal aberrations

The abiotic components are also termed as

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Chemical factors

Physical factors

Biological factors

A and B

Succinic acid differs from malonic acid by

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OH

CH₂

CH₃

CHO

Head of T4 bacteriophage contain

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Single stranded DNA

Double stranded DNA

Single stranded RNA

Both RNA and DNA

In deuterostomes mesoderm is derived from wall of developing

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Coelom

Heart

Archenteron

Blastopore

Enzymes present in human body generally have

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Same optimum temperature and optimum pH

Same optimum temperature but different optimum pH

Same optimum pH but different optimum temperature

Different optimum temperature and optimum pH

A carrier mother for colour blindness does not have

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A normal boy

A carrier boy

A colour blind boy

A normal daughter

Optimum pH for digestive enzymes of stomach is

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Highly acidic

Highly alkaline

slightly acidic

slightly alkaline

A group of ribosomes attached with same mRNA form polysome for

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Better expression of Gene

Rapid production of protein

Increased production of protein

Protein export

Both Glycoprotein and glycolipids are components of

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Plant Cell walls

Algal Cell Walls

Fungal Cell Wall

Biological Membranes

The idea of inheritance of acquired characteristics was presented by

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Margulis

Lamarck

Linnaeus

Cuvier

Genes can be mapped on chromosomes on the basis of

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Sex linkage

Assortment

Recombination frequency

Gene sequencing

Capability of extra nuclear inheritance is found in

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Ribosomes

Lysosomes

Mitochondria

Chromosomes

Substances cross the cell membrane more easily when they are

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water soluble

protein soluble

alcohol soluble

lipid soluble

Cells recycle their dead parts with the help of

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Centrioles

Vacuoles

Lysosomes

Golgi apparatus

All populations within an ecosystem are known as a:

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Population

Community

Species

Clan

Chemical formula of pentose sugar present in DNA

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C₅H₉O₅

C₅H₁₀O₅

C₅H₁₀O₄

None

Which rule depicts its correct statement regarding temperature variation?

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Allen's Rule:

Birds and mammals have greater size in cold region

Bergman's Rule:

The tail snout and ears are smaller in colder region.

Jordan's Rule:

Birds in cold regions are with narrow wings.

All are false.

All food chain and food web begin with:

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Producers

Consumers

Decomposers

Prey

--------- Develop the basic formwork of plasma membrane:

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Phospholipids

Glycoproteins

Glycolipids

The bacteria in the root nodules fix ______ in soil air, converting it to amino acids

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Nitrogen

Phosphorus

Sulphur

Iron

An association between two organisms, which brings benefit to both the organisms is called:

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Parasitism

Commensalisms

Predation

Symbiosis

An ecosystem is made up of three main components:

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The herbivores, carnivores and omnivores

The produces, the consumers and the decomposers

Primary, secondary and tertiary consumers

Producers, herbivores and carnivoers

According to Darwin descent with modification means

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Same ancestor

Same characters

Different ancestors

Different characters

The synthesis of Golgi bodies is initiated by

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Ribosomes

R.E.R

S.E.R

Lysosome

The concept that all living things came into existence in their present forms especially created by Nature is called as

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Theory of special creation

Theory of special selection

Theory of natural creation

Theory of natural selection

Terrestrial ecosystem have main types of ecosystem:

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Five

Four

Three

Two

The bond formed between glucose and fructose to form sucrose

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α 1 , 4 Glycosidic bond

β 1 , 4 Glycosidic bond

α 1 , 2 Glycosidic bond

β 1 , 2 Glycosidic bond

The pore by which the water leaves the body of sponges is called

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Ostia

Osculum

Spicules

Medreporite

Which can't increase their weight in inorganic medium

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Producer

Consumer

Decomposer

Both b & c

Salt water ocean and sea are the largest ecosystem which cover __________ of earth surfaces.

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70%

71%

80%

65%

HIV attaches on cell membrane of T cell at _____ receptor site

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Cd2

Cd4

Cd8

Gp120

The process by which the limited amount of nitrogen is circulated and recirculated throughout the world of living organisms is known as the

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Nitrogen cycle

Nitrogen path way

Nitrogen depletion

None of above

A little light is left to power photosynthesis at the depth of:

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500 feet

700 feet

600 Feet

1000 Feet

Which is not the function of glucagon

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Glycogen hydrolysis

Lipolysis

Gluconeogenesis

Protein synthesis

The chief reservoir of nitrogen is the

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Atmosphere

Water

Soil

Rain

X and Y linked genes are also called as :

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Sex genes

Dominant genes

Autosomal genes

Pseudoautosomal genes

Which of the following is not an enzyme of HIV

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Reverse transcriptase

Integerase

Protease

Ligase

An activated enzyme consisting of polypeptide and cofactor is called as

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Activator

Apoenzyme

Holoenzyme

Coenzyme

Catalase and chymotrypsin have similar

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Substrate

Product

Optimum pH

Metabolic impact

Grazers feed mainly on which kind of plants

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Tree leaves

Shrubs

Grasses

Cereals

Nutrient elements become the part of protoplasm during

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Photosynthesis

Decomposition

Fixation

Assimilation

The essential requirement for life is:

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Minerals

Water

Carbohydrates

Proteins

____can be checked by increasing substrate concentration

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Reversible inhibition

Irreversible inhibition

Noncompetitive inhibition

Competitive inhibition

The body of a Hydra can be divided in two equal halves vertically in

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One plane only

Two planes

Three planes

Any plane

Modern man has been on this planet for about

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4000 years

400,000 year

40,000 years

50,000 years

Is is universally accepted by biologists that mammals have evolved from reptilian ancestors called …………

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Cotylosaurs

Dinosaurs

Cotylostomata

Amphibians

The actual location or place where an organism lives is called its:

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Niche

Habitat

Abode

Terrain

Pick out the phospholipid from the following

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Phosphatidylserine

Lecithin

Phosphatidylcholine

All

Lamarck published his theory of evolution in

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1822

1812

1817

1809