Question # 1

The last stage of plant succession is

Choose an answer

Pioneer

Climax

Community

None of above

The study of relationship of an organisms to their environment is known is

Choose an answer

Biology

Ecology

Zoology

Mycology

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

Choose an answer

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 +

Two main types of environment factors are:

Choose an answer

Geotropism and phototropism

Abiotic and biotic

Land aquatic

None of these

Succinic acid dehydrogenase +succinic acid and high concentration of malonic acid?

Choose an answer

Maleic acid

Fumaric acid

No reaction

Oxalic acid

This is an association between a host and a parasite

Choose an answer

Predation

Anemies

Parasitism

None of above

Tritanopia is blindness of

Choose an answer

Red Colour

Green Colour

Blue Colour

Pink Colour

Population of Pakistan was ________ in 1947

Choose an answer

23.5 million

30 million

32.5 million

40 million

Potentially damaging enzymes are produced in

Choose an answer

Active form

Inactive form

Abundant quantity

Minor quantity

Function of succinic dehydrogenase is aided by

Choose an answer

Metal ion

Vitamin

NAD

FAD

Between 80 to 90% of the original energy is lost as heat as a byproduct of

Choose an answer

Photosyntheis

Urine

Respiration

All of the above

Which of the following is not true about biotic components

Choose an answer

Producers

Consumers

Decomposers

Atmosphere

Digestive vacuoles are also called as

Choose an answer

Primary Lysosomes

Secondary Lysosomes

Phagocytic Vacuoles

Pinocytic Vacuoles

If non protein part is covalently bonded to the protein part of enzyme, it is known as

Choose an answer

Coenzyme

Prosthetic group

Activator

Cofactor

Grazers feed mainly on which kind of plants

Choose an answer

Tree leaves

Shrubs

Grasses

Cereals

STH promotes_____ after puberty

Choose an answer

Protein synthesis

Cell differentiation

Metabolism

Cell division

Man has ____________ linkage group

Choose an answer

23

21

25

46

Which of the following is Koshland model

Choose an answer

Active site is rigid

Active site may be molded to précised shape

Position of active site is moveable

None

Xerophytes can withstand with extreme conditions due to the presence of

Choose an answer

Large parenchyma cells in the leaf

Sunken stomata

Thick cuticle and palisade layer

All of these

A collection of related parts that function as a unit is called:

Choose an answer

Organ

Organism

System

Individual

All populations within an ecosystem are known as a:

Choose an answer

Population

Community

Species

Clan

Green photosynthetic plants are

Choose an answer

Producers

Consumers

Decomposers

None of the above

Which of the following is not affected by enzymes

Choose an answer

Nature and properties of end products

Nature and properties of reactants

Speed of biochemical reaction

Efficiency of biochemical reaction

What is the probability of having albino child if father and mother both are carrier(Aa)

Choose an answer

25%

30%

50%

75%

The intake of liquid material across the cell membrane is called as

Choose an answer

Phagocytosis

Pinocytosis

Endocytosis

Exocytosis

Retroviruses cause tumors in

Choose an answer

Rodents

Fowls

Cats

All

Isosahedral viruses usually have ___

Choose an answer

10 faces

20 faces

15 faces

5 faces

Primary sensory areas are present in

Choose an answer

Cerebral cortex

Cerebral medulla

Cerebellum

Medulla oblamgata

Which of the following statement is wrong?

Choose an answer

Fungi have mitochondria

Mitochondria have DNA and ribosomes

Mitochondrial ribosomes resemble more to eukaryotic ribosomes

Mitochondria are self-replicating organelles

Air conditioners are the source of

Choose an answer

Effluents

SO₂,NO₂

Heavy metals

CFCs

The succession which occurs in dry soil or rock is

Choose an answer

Hydrosere

Xerosere

Decrosere

All of these

Synaptic vesicles are present in synaptic knob that is part of

Choose an answer

Post synaptic neuron

Pre synaptic neuron

Both neurons

Second neuron

Both Glycoprotein and glycolipids are components of

Choose an answer

Plant Cell walls

Algal Cell Walls

Fungal Cell Wall

Biological Membranes

______ incorporate gaseous nitrogen from air into organic nitrogen containing compounds

Choose an answer

Nitrogen fixing bacteria

Nitrogen degrading bacteria

Both A and B

None of above

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

Choose an answer

Parasitism

Commensalism

Predation

Mutualism

Capability of extra nuclear inheritance is found in

Choose an answer

Ribosomes

Lysosomes

Mitochondria

Chromosomes

Major regional ecological community of plants and animals forms:

Choose an answer

Triomes

Biosphere

Biomes

Biogeography

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

Choose an answer

Trypsin

Insulin

Keratin

Glucose

The only phylum included in Grade Radiata is:

Choose an answer

Porifera

Aschelminthes

Platyhelminthes

Cnidaria

Primary succession that starts on a dry habitat is called:

Choose an answer

Hydrosere

Derosere

Xerosere

Aquasere

Allosteric enzymes have ___ major sites

Choose an answer

1

2

3

4

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

Choose an answer

Envelope

Spikes

Both

Capsid

The succession started on bare area is called as

Choose an answer

Primary succession

Secondary succession

Tertiary succession

Quartnary succession

Endosymbiont hypothesis was first proposed by

Choose an answer

Lynn Margulis

Malthus

Cuvier

Darwin

About 20 years ago what was the rate at which human population was increasing

Choose an answer

1%

2%

3%

5%

Animals are

Choose an answer

Producers

Consumers

Decomposers

Non of the above

The study of different communities (grouping of population) in relation to their environment is called

Choose an answer

Autecology

Synecology

Ecology

Biogeopraphy

Melanin pigment is produced under the hormone

Choose an answer

ADH

MSH

STH

TSH

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

Choose an answer

Autecology

Synecology

Ecology

Biogeopraphy

Elements required in large amount are called

Choose an answer

Micronutrient

Macronutrient

Organic elements

Inorganic elements

Eagle may eat blue bird, but blue bird eats insects like caterpillar and caterpillar feeds on grass or green leaves. This is a ______

Choose an answer

Food chain

Food web

Both A and B

None of above

The biotic components of the ecosystem are the

Choose an answer

Producers

Consumers

Producers,consumers and the decomposers

Decomposers

Head of T4 bacteriophage contain

Choose an answer

Single stranded DNA

Double stranded DNA

Single stranded RNA

Both RNA and DNA

Charles Eton defined the niche as the species:

Choose an answer

Work

Employment

Job

Occupation

The establishment of woody plants that inhibits the growth of most plants other than mosses in succession is known as

Choose an answer

Climax stage

Shrub stage

Tree stage

All of these