Question # 1

Succession starting in pond is called

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Hydrosere

Xerosere

Pioneers

None of these

It has duality in its functioning

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Pituitary gland

Pancreas

Gonads

Gut

Which of the following is always an intracellular parasite

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Zooparasite

Viral parasite

Phyto parasite

Microbial parasite

Example of a virus having tadpole shape consisted of head and tail

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Bacteriophage

Polio virus

HIV

HV

In each case succession begins with few hard invaders called:

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Producers

Consumers

Pioneers

Beginners

Pick out the phospholipid from the following

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Phosphatidylserine

Lecithin

Phosphatidylcholine

All

In case of symbiosis ___________ is benefited.

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Host

Parasite

Both host and parasite

None of these

______ are important components of brain and plasma membrane:

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Nucleoproteins

Glycolipids

Lipoproteins

Phospholipids

The competitive inhibitor competes with the

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Enzyme

Cofactor

Substrate

Coenzyme

Which component of the cell is mainly concerned with production of cell secretions?

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Ribosome

Cytoskeleton

Mitochondria

Golgi

In rats whose adrenal medulla has been removed surgically, the ability to with stand any stress situation such as cold

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Is Enhanced

Is diminished

Remains unaffected

Is finished

Notochord is present throughout life in

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Urochordates

Chordates

Cephalochordates

Vertebrates

______ is a change in the community structure of an ecosystem over a period of time

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Succession

Primary succession

Secondary succession

None of above

Charles Darwin was born in Shrewsbury, in Western England in

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1854

1807

1809

1866

The animal that is caught and eaten is the

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Predator

Prey

Consumer

Both a and c

The type of association between two organisms, which brings benefit to both the organisms is called

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Commensalism

Predation

Mutualism

Parasitism

The study of a single population's relationship to its environment will be called as

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Autecology

Synecology

Ecology

Biogeopraphy

Which of the following properties is incorrect for both mitochondria and chloroplast?

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Both have an electron transport system

ATP synthesis

Both are present in all cells

Both have double membrane structures

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

In tandra forests the willow tree with an age of 50 year have diameter of trunk only:

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5 cm

7 cm

8 cm

10 cm

--------------- and --------------- have same number of chromosome

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Man, Chimpanzee

Chimpanzee, Potato

Man, Potato

Potato, Tomato

All chromosomes other than sex chromosomes are called :

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Linked chromosomes

Atusomes

Autophagosommes

Dictyosomes

Crystallization of viruses was done by _____ for the first time

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Ivanowsky

Twort

Stanley

Robert Koch

About ______% if the total energy from the sun is trapped by the producers in an ecosystem

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0.5

1.0

1.5

2.0

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

Many enzymes are simply dissolved in the

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Nucleoplasm

Stroma of chloroplast

Cytoplasm

Matrix of mitochondria

Mycorrhiza is an association of

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Algae with roots of higher plants

Bryophytes with roots of higher plants

Fungi with roots of higher plants

Bacteria with roots of higher plants

______ are autotrophic organisms

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Producers

Consumers

Decomposers

All of the above

Which of the following statement is wrong?

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Fungi have mitochondria

Mitochondria have DNA and ribosomes

Mitochondrial ribosomes resemble more to eukaryotic ribosomes

Mitochondria are self-replicating organelles

Excessive ploughing of lands in arid regions results in the development of

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Forest

Deserts

Grassland

Fields

It is community relay

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Niche

Evolution

Speciation

Succession

Heterotrophic organisms are basically:

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Producers

Consumers

Producer and consumers

None of these

Which one of the following is site of oxidative Phosphorylation in mitochondria

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Cristae

Outer membrane

Matric

Ribosome

Moss stage is represented by

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Polytrichum

Tortula

Adiantum

Both a and b

Non-neural cells which encapsule the axon of neurons are

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Microglial

Microbodies

Schwann cells

Companion cells

All food chain and food web begin with:

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Producers

Consumers

Decomposers

Prey

Methylation of proteins occur in

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Transport vesicles of endoplasmic reticulum

Lysosomes

Golgi apparatus

Transport vesicles of Golgi bodies

What happens when both alleles of a gene pair independently express in a heterozygote?

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dominance

incomplete dominance

over dominance

codominance

An exchange of segments between non-sister chromatids of homologous chromosomes during meiosis is termed as :

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Crossing over

Hopping

Taking over

Segregation

The sucessions started on water is called as

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Hydrosere

Xerosere

Derosere

None of the above

Among the scientists who believed in divine creation as

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Darwin

Carolous Linnaeous

Lamarck

Wallace

Formation of ES complex activates the______ site of an enzyme

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Active

Binding

Catalytic

Allosteric

Which of the following sugar is abundant in muscle fibres

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Myoglobin

Starch

Glycogen

Oxygen

Animals feed on green plants and grasses are called

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Grazers

Produces

Consumers

Predators

Digestive vacuoles are also called as

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Primary Lysosomes

Secondary Lysosomes

Phagocytic Vacuoles

Pinocytic Vacuoles

Pick up the most developed coelomates

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Echinoderms

Annelids

Chordates

Insects

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

In an ecosystem after succession, a new invaders are called

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Pioneers

Predecessors

Climax community

None of these

In limnetic zone the phytoplankton are:

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Cyanobacteria

Protozoan

Fungi

Bacteria

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

Food web is the group of various

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Food substances

Food chains

Trophic levels

All of these

All populations within an ecosystem are known as a:

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Population

Community

Species

Clan

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

The amount of energy left after plants have met their respiratory needs is net primary production, which shows up as plant:

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Respiration

Photosynthesis

Biomass

Reserve

____can be checked by increasing substrate concentration

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Reversible inhibition

Irreversible inhibition

Noncompetitive inhibition

Competitive inhibition

A symbiotic association between a fungus and the roots of higher plants is known as

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Lichen

Parasitism

Mycorrhiza

Commensalism

The simplest reflex circuit includes___ elements

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1

2

3

4

Lichen is the example of

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Mutualism

Commenaslim

Parasitism

All of above

Which one of following structures is formed from mesoderm?

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Intestinal lining

Muscles

Skin

Brain

All the organisms, primarily animals, which obtain energy directly or indirectly from the produces as ready-organic food are:

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Decomposers

Consumers

Detritivores

Scavengers

______form the raw material for coenzyme

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Nucleic acid

Lipids

Vitamins

Proteins

Abiotic factors include:

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Geomagnetism

Gravity

Water

All these

Acid rain is mainly due to

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SO₂

NO₂

Lead components

Both a and b

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

Ozone is present at about ________ km above earth

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5 -10

10 - 20

10 - 40

10 - 50

The optimum temperature for most of the enzymes in human body is

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37 ^oC

35^oC

37 ^oF

98.6^oC

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.

Following substances can act as inhibitors, except

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Cyanide

Antimetabolites

Antibodies

Poisons

Animals are

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Producers

Consumers

Decomposers

Non of the above

The last stage of plant succession is

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Pioneer

Climax

Community

None of above

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

Which of the following is a distinguishing character of sponges

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Tentacles

Ceoleteron

Choanocytes

Calcareous skeleton

This is not the part of neuron

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Axon

Dendron

Nissl’ granules

Synapse

The cells absent in sponges are

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Chondrocytes

Pinacocytes

Choanocytes

Archeocytes

Vector for spread of African sleeping sickness is

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Anopheles

Commonhouse fly

Tse-tse fly

Honey bee

Chemical nature of spikes present on HIV

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Protein

Carbohydrate

Glycolipid

Glycoprotein

Secondary structure is the ultimate structural level of which of the following proteins?

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Trypsin

Insulin

Keratin

Glucose

All living organisms supported by biosphere are called

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Biotic components

Abiotic components

Autecology

Synecology

Succession begins by a few hardy invaders called:

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Founders

Initiators

Pioneers

Leaders

Hormones secreted by follicles in female

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Estrogen

Progesterone

FSH

Both a and b

The succession which occurs in dry soil or rock is

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Hydrosere

Xerosere

Decrosere

All of these