Question # 1

The simplest mono saccharide containing keto group is:

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Glyceraldehyde

Glucose

Dihydroxyacetone

Ribose

Parasites that live inside the body of the host:

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Endoparasites

Ectoparasites

Mesoparasites

Both a & c

Chloroplasts and mitochondria differ from one another because

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Both are membranous organelles

Both are non-membranous organelles

Both are not present in all cells

Both do not contain proteins

Crustose refers to:

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Aquatic lifeless structure

Aquatic lively structure

Land lively structure

Land lifeless structure

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

Chemical nature of spikes present on HIV

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Protein

Carbohydrate

Glycolipid

Glycoprotein

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 term enzyme was coined from a Greek word which means

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In yeast

In grapes

In apple

In bacteria

Which type of hepatitis leads to chronic liver disease?

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Hepatitis D

Hepatitis A

Hepatitis B

Hepatitis C

Nucleus is visible when the cell is in ____ stage

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Non-dividing

Dividing

active

Both a and b

Primary succession that starts in a pond is called:

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Hydrosere

Derosere

Xerosere

Aquasure

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

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

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dominance

incomplete dominance

over dominance

codominance

The animal that is caught and eaten away is called

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Victim

Prey

Predators

Host

The nutrients in aquatic ecosystem tends to be concentrated near the

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Bottom

Surface

Center of total depth

10 feet below the surface

All populations within an ecosystem are known as a:

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Population

Community

Species

Clan

Viruses reproduce through a process

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Binary fission

Replication

Both a and b

Transformation

In life cycle of bacteriophage, ______ occurs followed by_______.

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Assembly. Penetration

Multiplication, landing

Tail contractio, Penetration

Penetration, Assembly

______ 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

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

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20%

10%

5%

1%

In each case succession begins with few hard invaders called:

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Producers

Consumers

Pioneers

Beginners

Digestive vacuoles are also called as

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Primary Lysosomes

Secondary Lysosomes

Phagocytic Vacuoles

Pinocytic Vacuoles

Osteoporosis is caused by lack of

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ADH

Melanin

Estrogen

STH

Viruses are not resistant to

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Interferons

Penicillin

Streptomycin

Any antibiotic

The relationship of a single population towards its environment is called

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Ecology

Synecology

Autoecology

All of foregoing

Lamarck was incharge of invertebrate collection at Natural History Museum is

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Berlin

Paris

California

Brun

Succession starting in pond is called

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Hydrosere

Xerosere

Pioneers

None of these

About ______% of solar energy is used to evaporate water, heat up soil and then lost to the outer space

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95

97

98

99

Which of these stages appears as a pioneer during succession on barren land?

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Foliage lichens

Mosses

Crustose lichens

Fruiticose lichens

Which one of the following enzymes have slightly acidic pH as optimum pH?

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Sucrase

Enterokinase

Pepsin

Catalase

Eukaryotes are thought to hve evolved firstly about:

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1.3 billion year ago

1.5 billion year ago

1.7 billion year ago

1.2 billion year ago

When succession starts on dry soil or rocks it is called:

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Hydrosere

Derosere

Xerosere

lithosere

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

It is not a germ layer

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Ectoderm

Endoderm

Blastoderm

Mesoderm

Ribozyme is found in

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Mitochondria

Cytoplasm

Lysosomes

Ribosomes

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

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1

2

3

4

Root Nodules are the example of

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Predation

Symbiosis

Parasitism

None of above

According to Darwin descent with modification means

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Same ancestor

Same characters

Different ancestors

Different characters

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

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Symbiotic

Mutualistic

Parasitic

Mycorrhizal

The green photosynthetic plants, which capture and bring light energy into the ecosystem are:

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Decomposers

Consumers

Producers

Scanvengers

Over-grazing may lead to:

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Desert

Tundra

Taiga

Grassland

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

What is done to monkeys by HIV

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Multiplication and disease

Infection and multiplication

Infection and disease

None

Ventral root of the spinal nerve contains

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Sensory nerve fibres

Motor nerve fibres

Mixed nerve fibres

All

Substances cross the cell membrane more easily when they are

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water soluble

protein soluble

alcohol soluble

lipid soluble

Provirus is

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Genome of bacteriophage

Genome of HIV uncoiled in Host cell

Genome of HIV incorporated in Host genome

Genome of a host

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

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Parasitism

Commensalisms

Predation

Symbiosis

Tape worm is the example of

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Endoparasite

Ectoparasite

Outer parasite

All of above

Forest ecosystem is subdivided into ____ type of forests.

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Two

Four

Five

Three

Plants growing in xeric (dry) condition are called:

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Hydrophytes

Xerophytes

Mesophytes

Derophytes

The combination of many food chains is termed as

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Food chain

Food web

Trophic level

None of above

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

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Glyceraldehyde

Ribose

Glucose

Fructose

Each biome consists of a combination of plants and animals in the fully developed

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Climax community

Community

Population

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

Decomposers get their food from

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Soil particles

Dead organic matter

Green plants

Living organisms

These micro-organisms use the proteins and amino acids and release excess of ammonia (NH₃) or ammonium ions (NH₄). This process is known as

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Ammonification

Nitrification

Assimilation

All of above

Global warming is the result of

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Ozone layer depletion

Acid rain

Green house gases

All of them

They may also control some long term changes

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Enzymes

Neurons

Hormones

CNS

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

Insulin receptors are present in

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Cytoplasm of muscle cells

Cell membrane of liver cells

Cell membrane of muscles and liver cells

Cell membrane of all body cells

Allele for whiteness in Drosophilla is

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Recessive

Codominant

Dominant

Partially dominant

What is trampling

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Eating grasses to roots

Nipping leaves

Overgrazing

Putting pressure on soil to make it compact

When a haemophilic carrier woman marries a normal man, who among her offspring may be affected

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all her children

all her daughter

half of her daughter

half of her sons

Ultimate source of all changes is :

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Mutation

Genetic drift

Evolution

Migration

Inorganic ions can play a role of ¬¬¬¬¬¬¬______ in enzyme catalysis

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Coenzyme

Inhibitor

Apo enzyme

Cofactor

Hormones secreted by follicles in female

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Estrogen

Progesterone

FSH

Both a and b

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

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Intertidal zone

Littoral zone

profundal zone

Limnetic zone

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

Nutrient elements become the part of protoplasm during

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Photosynthesis

Decomposition

Fixation

Assimilation

Which are pioneers of terrestrial ecosystem

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Dermatocarpons

Parmelia

Polytrichum

None of these

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

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Lichen

Parasitism

Mycorrhiza

Commensalism

The chemical elements essential for life in living organisms are called:

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Biogenic elements

Nutrient elements

Both a & b

Genetic elements

Most of the vectors for spreading important human diseases belong to:

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Radiata

Acoelomates

Pseudocoelomates

Coelomates

Which hormone require 2nd messenger

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Insulin

Estrogen

Progesterone

Testosterone

The eating of grasses is termed as

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Grassing

Browsing

Eating

None of above

Which can't increase their weight in inorganic medium

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Producer

Consumer

Decomposer

Both b & c

Succinic acid is the ____ of succinic dehydrogenase which undergoes____

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Active site, reduction

Prosthetic group, reduction

Substrate, oxidation

Substrate, reduction

The symbiotic relationship in which both the partners get benefit is:

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Parasitism

Commensalism

Predation

Mutualism

Bacterial live and get food from roots of plants is an example of

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Symbiosis

Mutualism

Parasitism

Infestation

Most unifying characteristics of all types of cells is

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Cell membrane

Nucleus

Ribosomes

S.E.R

In deoxyribose, oxygen is removed from carbon number

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1

2

3

4