Question # 1

The dominance relations of 4 O'clock plant can be described in terms of :

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Complete Dominance

Incomplete Dominance

Partial Dominance

Both b and c

Coniferous forests of high altitude are known as:

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tundra

Boreal

Alpine

Arctic

Which is not a seral stage

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Climax forest

Moss

Shrub

None

The term ecology was first used by a ________ zoologist.

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American

Canadian

German

Greece

What is the risk of a colour blind child in a family when mother is colour-blind but father is normal?

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100%

75%

50%

25%

Chemical formula of pentose sugar present in DNA

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C₅H₉O₅

C₅H₁₀O₅

C₅H₁₀O₄

None

Ventral root of the spinal nerve contains

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Sensory nerve fibres

Motor nerve fibres

Mixed nerve fibres

All

Endangered plant species have been recorded to more than:

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600

400

500

300

Common housefly is involved in spread of all diseases except

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Hepatitis

Malaria

Dysentery

Cholera

Glycerol, fatty acids and phosphoric acid give rise to:

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Phospholipid

Phosphatidic acid

Phosphatidyl choline

Phosphatidylethnoline

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

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Parasitism

Commensalisms

Predation

Symbiosis

Chlorophyll molecules resemble with which part of hemoglobin?

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Polypeptide chains

Globin part

Non-Protein

All

Charles Eton defined the niche as the species:

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Work

Employment

Job

Occupation

The inhibitor having structural similarity with substrate is

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Irreversible inhibitor

Reversible inhibitor

Competitive inhibitor

Noncompetitive inhibitor

The ecosystem present on land or soil is called

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Terrestrial ecosystem

Lithospheric ecosystem

A and B

None

The oxidation of ammonia is

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Ammonification

Nitrogen fixation

Nitrification

Denitrification

In a phospholipid molecule, phosphoric acid is attached to the carbon number_____ of glycerol.

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1

2

3

4

All populations within an ecosystem are known as a:

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Population

Community

Species

Clan

Catalase and chymotrypsin have similar

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Substrate

Product

Optimum pH

Metabolic impact

The organisms found in the gut of the termites which help it digest wood are the

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Bacteria

Fungi

Flagellates

Viruses

If substrate concentration is unlimited, rate of enzyme action becomes

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Inversely proportional to enzyme concentration

Directly proportional to enzyme concentration

Directly proportional to substrate Concentration

Inversely proportional to substrate

Concentration

Primary consumers form ______ trophic level

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First

Second

Third

Forth

The succession started after destruction of an area is called as

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Primary succession

Secondary succession

Tertiary succession

Quartnary succession

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 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

The association between a host and parasite is called

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Symbiosis

Mutualism

Parasitism

All of these

Group of interbreeding organisms residing together in space & times are

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Community

Population

Genus

Family

Algae are

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Microproducers

Macroproducers

Both A and B

None of above

Mutation of one or two N-bases is

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Inversion

Point mutation

Deletion

Chromosomal aberrations

Establishment of new forest at places where no forests existed previously is called

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Reforestation

Afforestration

Deforestration

Both a and b

Which eat consumers

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Predators

Carnivores

Omnivores

All

In an ecosystem after succession, a new invaders are called

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Pioneers

Predecessors

Climax community

None of these

Which can't increase their weight in inorganic medium

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Producer

Consumer

Decomposer

Both b & c

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

When a single gene has multiple phenotypic effects, the phenomenon is called:

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condominance

epistasis

pleiotropy

sex-linkage

Phosphorylation of glucose molecule in glycolysis is carried out by

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ATPase

Kinase

Isomerase

Transferase

Plants growing in xeric condition are called

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Xerophytes

Mesophytes

Hydrophytes

Schizophytes

DNA of non-virulent phage is

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Provirus

Prophage

Both

None

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

Causative agent of mysterious brain infection is composed of

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DNA+Protein

RNA+Protein

RNA only

Protein only

Animals feed on green plants and grasses are called

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Grazers

Produces

Consumers

Predators

Pick up the most developed coelomates

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Echinoderms

Annelids

Chordates

Insects

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

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Bacteriophage

Polio virus

HIV

HV

Infestations are the diseases which are caused by ________ in living organisms

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Parasites

Saprophytes

Bacteria

Viruses

Climax in zerosere is the establishment fo

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Woody forest

Grasses

Herbs

Shrubs

The major unit of ecology is:

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Biosphere

Ecosystem

Community

Population

Normal fruit flies have :

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White eyes

Bright red eyes

Light red eyes

Black eyes

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

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Commensalism

Predation

Mutualism

Parasitism

Soyabeans have been made resistant to a common

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Insecticide

Herbicide

Fungicide

Pesticide

Part of brain that is involved in learning

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Cerebrum

Thalamus

Cerebellum

Pons

Plants growing in xeric (dry) condition are called:

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Hydrophytes

Xerophytes

Mesophytes

Derophytes

Basically, all animals depend on plants for their:

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Living

Food

Life

Respiration

We can strengthen the soil nitrogen resources by adding:

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Liquid nitrogen to soil

Ammonia gas to soil

Nitrogen fertilizers to soil

Nitrogen fixing bacteria to soil

The basic role of an organism in the community is called

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Niche

Factor

Ability

None of above

Aerosol spray foams are potential sources of

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Carbon monoxide

Sulphur dioxide

Chlorofluorocarbons (CFCs)

Lead compounds

Depolarization of neural membrane is due to

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Influx of K+

Efflux of Na+

Influx of Na+

None

______ symbiont the root nodules of legume plants

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Virus

Fungi

Bacteria

Nematods

Grazers feed mainly on which kind of plants

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Tree leaves

Shrubs

Grasses

Cereals

Which of the following is a living character of virus

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Formation of Crystals

Production of new viral particles

Coordination

Metabolism

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

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Ribosome

Cytoskeleton

Mitochondria

Golgi

The animal that is caught and eaten is the

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Predator

Prey

Consumer

Both a and c

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

Benefits brings about by both of the organisms is called

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Mutualism

Symbiosis

Anabolism

catabolism

The fungi and bacteria, which obtain their energy from the dead and decaying plants and animals are:

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Decomposers

Consumers

Producers

Scanvengers

Nucleus is visible when the cell is in ____ stage

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Non-dividing

Dividing

active

Both a and b

Which of the following sugar does not form a ring structure in a solution

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Glyceraldehyde

Ribose

Glucose

Fructose

The chances of which hemophilia is equal in males & females

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A

B

C

All

Primary sensory areas are present in

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Cerebral cortex

Cerebral medulla

Cerebellum

Medulla oblamgata

What is the theoretical number of chemically different dipeptide that can be made from 2 different amino acids

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1

2

4

8

Plants like cacti store their water in large:

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Collenchyma tissues

Mesenchymal tissues

Parenchyma tissues

Epidermal tissues

Which of the following is an example of ribozyme

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Aminopeptidase

Pancreatic lipase

Peptidyl transferase

Cytochrome oxidase

Water changes its temperature:

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Faster than air

Same as air

Slower than air

Sometime slower and sometimes faster

The receptors which are 27 times more abundant than cold receptors

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Pressure receptors

Pain receptors

Heat receptors

Light receptors

Highest number of carbons are present in

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Butyric acid

Acetic acid

Palmitic acid

Oleic acid

What is done to monkeys by HIV

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Multiplication and disease

Infection and multiplication

Infection and disease

None

It is the study of the relationship of animals (organisms) to their environment

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Ecology

Ecosystem

Physiology

Mycology

What is cause of Eutrophication

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Excreta

Phosphate

Nitrates

All

Which of the following is not true about abiotic components

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Water

Temperature

Consumers

Gravity

Motor neurons are

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Multipolar

Bipolar

Unipolar

Tripolar

Which of the following is a distinguishing character of sponges

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Tentacles

Ceoleteron

Choanocytes

Calcareous skeleton

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