Question # 1

Darwin published " The Origin of Species" in

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1840

1844

1858

1859

Grasslands of tropic climate have woody trees and are called:

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Alpine

Boreal

Biome

Savanna

____can be checked by increasing substrate concentration

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Reversible inhibition

Irreversible inhibition

Noncompetitive inhibition

Competitive inhibition

Elements required in large amount are called

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Micronutrient

Macronutrient

Organic elements

Inorganic elements

Anti-Rh antibodies appear in plasma

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During first few months

During last months

Only when stimulated

If Rh⁺individual mistakenly receives Rh^-blood

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

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Trypsin

Insulin

Keratin

Glucose

Substances cross the cell membrane more easily when they are

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water soluble

protein soluble

alcohol soluble

lipid soluble

Optimum pH of all human enzymes is

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Variable

Same

Acidic

Alkaline

The only phylum included in Grade Radiata is:

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Porifera

Aschelminthes

Platyhelminthes

Cnidaria

Urine is preferably used as a vehicle for biotechnology product than:

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Blood

Milk

Plasma

Tissue fluid

All living organisms supported by biosphere are called

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Biotic components

Abiotic components

Autecology

Synecology

According to endosymbiont hypothesis the aerobic bacteria developed into

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Lysosomes

Mitachondria

Chloroplast

Nucleus

Which of the following is not true about biotic components

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Producers

Consumers

Decomposers

Atmosphere

Which of the following bond is not present in tertiary structure of proteins

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Peptide

Hydrogen

Ionic

Ester

After digestion, decomposers releases

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Various organic substances from organic matter

Nitrates, phosphates, and calcium

Citric acid, tartaric acid and oxlic acid

All of these

It lacks a true dendron

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Sensory neuron

Motor neuron

Associative neuron

Relay neuron

The study of relationship of a single population to its environment is called:

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Autecology

Synecology

Both a & b

None

Grazers feed mainly on which kind of plants

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Tree leaves

Shrubs

Grasses

Cereals

How many number of autosomal chromosome pairs are present in human

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22

33

44

46

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

Limnetic phytoplanktons include:

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Mossses

Algea

Bacteria

Cyanobacteria

It is not a germ layer

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Ectoderm

Endoderm

Blastoderm

Mesoderm

Non-neural cells which encapsule the axon of neurons are

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Microglial

Microbodies

Schwann cells

Companion cells

Mutatuons are inherited only if they occur in the

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Gland cells

Gametes

Muscle cells

Somatic cells

Choose the correct option about the following figure:

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A is showing Envelope

B is not showing envelope

C is showing RT

D is showing RNA

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

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

The living organism which can prepare their own food are:

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predators

parasites

producers

prey

Heterotrophic organisms are basically:

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Producers

Consumers

Producer and consumers

None of these

______ is a group of interbreeding individuals occurring together in space and time

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Population

Species

Community

All of above

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

A group of interbreeding individual occurring in space and times is called:

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Community

Population

Generation

Kingdom

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

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

Which type of nucleic acid is found in the capsid of HIV

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RNA

DNA

ssDNA

None

Animals involved in the construction of corals are

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Polyps

Medusae

Gonozooids

None

Interaction of two loci

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Pleiotropy

Epistasis

Dominance

Differentiation

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

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Ostia

Osculum

Spicules

Medreporite

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

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

The succession started on bare area is called as

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Primary succession

Secondary succession

Tertiary succession

Quartnary succession

Retroviruses cause tumors in

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Rodents

Fowls

Cats

All

Most nitrogen moves from the soil into the roots in the form of:

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Nitrogen gas

Nitrites

Ammonia

Nitrates

Chemical formula of pentose sugar present in DNA

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C₅H₉O₅

C₅H₁₀O₅

C₅H₁₀O₄

None

A group of interbreeding individuals of same species occurring together in space and time is called:

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Population

Community

Species

Clan

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

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

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1

2

Both

3

Slight change in pH can cause

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Denaturation

Crystallization

Ionization

All

Consumers are ______ organisms

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Autotrophic

Heterotrophic

Decomposers

None of above

Myelin is made up of

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Nucleoprotein

Lipoprotein

Glycolipids

Glycoproteins

In sickle cell beta chain glutamic acid is replaced by valine which is sixth amino acid from

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N-Terminal

C-Terminal

R-Terminal

H-Terminal

This is a ------------------- relationship between algae and fungi

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Symbiotic

Mutualistic

Parasitic

Mycorrhizal

Which of the following part of virus does not enter into host cell

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Envelope

Spikes

Both

Capsid

The soil of the deciduous forest is:

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Yellow

Grayish brown

Grayish black

Black

The actual location of place where an organisms live is called its:

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Ecosystem

Habitat

Niche

Biome

We are reducing natural 'carbon dioxide's

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Sources

Sinks

Both

None

Food chain is an example of

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Predation

Mode of nutrition

Trophic levels of food

All of these

On poles, the average temperature is

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Zero°C

5°C

Below freezing point

None

How plants are deprived of nutrients by acid rain

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Due to teaching

Due to fall in pH

Acid creates a barrier to absorption

Unknown cause

Algae are

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Microproducers

Macroproducers

Both A and B

None of above

What is trampling

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Eating grasses to roots

Nipping leaves

Overgrazing

Putting pressure on soil to make it compact

Degenerated testes are present in abdomen in which of these cases

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Down's syndrome

Klinefelter's sysndrome

Turner's syndrome

Testicular ferminization

Sickle cell mutation affects

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One beta chain

Both beta chains

Only alpha chain

None of the alpha or beta chain

RNA and Proteins are components of

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Chromosomes

Receptors

Secretions

Ribosome

The deficiency of which one of the following is cause of goiter

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Iodine

Calcium

Potassium

Iron

Nitrogen makes up 78 percent of the gases in:

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Biosphere

Ecosphere

Lithosphere

Atmosphere

This is an association between a host and a parasite

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Predation

Anemies

Parasitism

None of above

Tick the biotic (intra-specific) factors:

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Wave action, humidity, light

Colonization,aggregation,parental care

Neutralism,mutualism,predation

Mineral elements, mutualism,parasitism

The compound formed by the combination of a base and a pentose sugar is called:

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Nucleoside

Nucleic acid

Nucleotide

Nuclein

The succession started on deserts is termed as

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Hydrosere

Xerosere

Derosere

None of the above

Rh factor is encoded by

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2 genes which occupy 3 loci

3 genes which occupy 2 loci

2 genes which occupy 2 loci

3 genes which occupy 3 loci

The competitive inhibitor competes with the

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Enzyme

Cofactor

Substrate

Coenzyme

Overgrazing resulted in

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Diminishing the grasses

Desert

Barren land

All of these

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

DNA of non-virulent phage is

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Provirus

Prophage

Both

None

It is not a symptom of AIDS

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Swollen lymph nodes

Loss of immunity

Swollen neck

Pneumonia

The last stage of plant succession is

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Pioneer

Climax

Community

None of above

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

In deoxyribose, oxygen is removed from carbon number

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1

2

3

4

Herpes type-1 virus causes

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Pitted scars

Swollen neck

Rashes on genitals

Vascular lesions

Shallow water zone of the lake near the shore is called:

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Intertidal zone

Littoral zone

profundal zone

Limnetic zone