Question # 1

Both organisms benefit from the ______ relationship

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Mutualism

Commensalism

Parasitism

All of above

The nutrient cycles are also called:

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Biochemical cycles

Geochemical cycles

Biogeochemical cycles

Elemental cycles

Fungi and bacteria are:

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Producers

Consumers

Decomposers

Predators

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

Global warming is the result of

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Ozone layer depletion

Acid rain

Green house gases

All of them

Pre-chordates is another name used for

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Echinoderms

Protochordates

Cephalochordates

Hemichordates

When bacteria in soil oxidize ammonia or ammonium ions this is called:

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Oxidation

Denitrification

Ammonification

Nitrification

In 1917, Jpseph Grinnel an American ornithologist first proposed the term ______ in ecology

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Habitat

Niche

Area

Space

Which of the following disease is not caused by virus?

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Cholera

Hepatitis

Influenza

Polio

Chlorophyll molecules resemble with which part of hemoglobin?

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Polypeptide chains

Globin part

Non-Protein

All

Which is not the function of glucagon

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Glycogen hydrolysis

Lipolysis

Gluconeogenesis

Protein synthesis

The sucessions started on water is called as

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Hydrosere

Xerosere

Derosere

None of the above

Succinic acid differs from malonic acid by

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OH

CH₂

CH₃

CHO

Nerve which carries impulses from CNS to effectors

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Sensory

Inter

Motor

Associative

Rh factor or antigen was first studied in :

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Man

Owl

Monkey

Fish

Which of the following cannot cross the phospholipid bilayer easily

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Ions

Gas molecules

Ethanol

Steroids

Green photosynthetic plants are

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Producers

Consumers

Decomposers

None of the 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

Herbaceous stage in xerosere is the __________:

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First stage

Third stage

Fourth stage

Last stage

Ozone is present at about ________ km above earth

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5 -10

10 - 20

10 - 40

10 - 50

Viruses containing RNA rather than DNA are called

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Riboviruses

Bacteriophages

Rotaviruses

Retroviruses

Charles Eton defined the niche as the species:

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Work

Employment

Job

Occupation

There is an association between two organisms, which brings benefits to both the organisms

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Predation

Symbiosis

Parasitism

None of above

It brings about an increase in blood glucose level mainly by its production from glycogen

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Insulin

Glucagon

Cortisol

Aldosterone

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

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condominance

epistasis

pleiotropy

sex-linkage

Which of the following is not an abiotic component

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Atmosphere

Hydrosphere

Lithosphere

Producers

If six cells out of 10, do crossing over what will be percentage of cross over gametes

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60%

30%

40%

50%

Depolarization of neural membrane is due to

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Influx of K+

Efflux of Na+

Influx of Na+

None

Biosphere is a thin layer of ______ in which all living organism exist

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Earth

Air

Space

None of above

Pseudo-autosomal genes are present on

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X-chromosome

Y-chromosome

Both a & b

Autosomes

Terrestrial ecosystem have main types of ecosystem:

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Five

Four

Three

Two

Head of T4 bacteriophage contain

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Single stranded DNA

Double stranded DNA

Single stranded RNA

Both RNA and DNA

Which of the following is not the true about predation

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Prey increases by increasing the predation

Predation increases by increasing the prey

Prey decreases by increasing the predation

Prey must follow the predation

The total energy from the sun is trapped by the producers in an ecosystem is about:

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20%

10%

5%

1%

The predeter and prey relationship is called as

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Predation

Animes

Parasitism

None of above

Substances cross the cell membrane more easily when they are

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water soluble

protein soluble

alcohol soluble

lipid soluble

Chemical nature of spikes present on HIV

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Protein

Carbohydrate

Glycolipid

Glycoprotein

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%

Nucleus is visible when the cell is in ____ stage

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Non-dividing

Dividing

active

Both a and b

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

The specificity of enzymes is due to their

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High molecular weight

pH sensitivity

Hydrogen bonding

Surface configuration

Phosphorylation of glucose molecule in glycolysis is carried out by

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ATPase

Kinase

Isomerase

Transferase

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

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%

Glyosidic bond is formed by the

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Removal of Oxygen

Addition of Water

Addition of Oxygen

Removal of Water

______ symbiont the root nodules of legume plants

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Virus

Fungi

Bacteria

Nematods

The idea of endosymbiont hypothesis was first proposed by:

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Lynn marguils

Wallace

Karlene Schwartz

Lamarck

Diabetes insipidus is caused by

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Lack of aldosterone

Overproduction of ADH

Lack of ADH

Lack of insulin

Food chains combine to form

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Large food chain

Large organisms

Trophic levels

Food web

Slight change in pH can cause

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Denaturation

Crystallization

Ionization

All

Regional ecological community of plants & animals primarily determined by climate

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Biome

Niche

Habitat

Both b & c

The gross production of an ecosystem is its total

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Photosynthesis

Net production

Photosynthate

Biomass

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

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Worms

Saprophytes

Bacteria

Virus

Aerosol spray foams are potential sources of

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Carbon monoxide

Sulphur dioxide

Chlorofluorocarbons (CFCs)

Lead compounds

Xerosere starts with __________ stage.

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Crustose lichen

Foliose lichen

Mass

Shrub

Nicotinamide adenine dinucleotide is an example of

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Cofactor

Coenzyme

Prosthetic group

Nucleotide

Pick up the correct statement according to induced fit model of enzyme action

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Enzyme induces changes in substrate structure

Substrate induces changes in enzyme structure

Active site of enzyme is a rigid structure

Active site of enzyme is used as a template +

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

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Autecology

Synecology

Ecology

Biogeopraphy

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

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

Notochord is present throughout life in

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Urochordates

Chordates

Cephalochordates

Vertebrates

Which hormone require 2nd messenger

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Insulin

Estrogen

Progesterone

Testosterone

DNA of non-virulent phage is

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Provirus

Prophage

Both

None

Which of the following hormone affects the supply of testosterone

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LH

GH

FSH

Aldosterone

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

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Parasitism

Commensalisms

Predation

Symbiosis

Cloud cover is reduced due to

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Reforestation

Afforestration

Deforestration

Air pollution

Primary sensory areas are present in

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Cerebral cortex

Cerebral medulla

Cerebellum

Medulla oblamgata

Pick up the false statement regarding HIV

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Lipoprotein envelope

Two RNA molecules

Two molecules of RT enzyme

Round shaped capsid

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

The synecology is also termed as

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Community ecology

Population ecology

Specie ecology

All of above

In each case succession begins with few hard invaders called:

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Producers

Consumers

Pioneers

Beginners

A ______of energy can be constructed showing energy transfer in a community of organisms

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Pyramid

Triangle

Rectangular

None of above

Which of the following is a messenger of both chemical and nervous coordination

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Acetylcholine

Dopamine

Epinephrine

Serotonin

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

The change in structure of community of an ecosystem during a time period is called

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Succession

Evolution

Mutation

Regression

Endosymbiont hypothesis was first proposed by

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Lynn Margulis

Malthus

Cuvier

Darwin

Grazers feed mainly on which kind of plants

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Tree leaves

Shrubs

Grasses

Cereals

Ecology is a ______ word.

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German

British

French

Greek

Darwin published " The Origin of Species" in

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1840

1844

1858

1859

The only phylum included in Grade Radiata is:

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Porifera

Aschelminthes

Platyhelminthes

Cnidaria

A symbiotic relationship that benefits one species & neither helps nor harms the other is called

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Mycorrihza

Symbiosis

Commensalism

Mutualism