Question # 1

The soil of the deciduous forest is:

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Yellow

Grayish brown

Grayish black

Black

_____ is a good example of polymorphism

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Hydra

Obelia

Starfish

Euplectella

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

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Biology

Ecology

Zoology

Mycology

The Organic biomolecule which is widespread in bacterial animal and plant cells is

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Wax

Glucose

Acyl glycerol

Phospholipids

Fungi as well as bacteria are generally known as

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Producers

Consumers

Decomposers

None

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

Optimum pH for digestive enzymes of stomach is

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Highly acidic

Highly alkaline

slightly acidic

slightly alkaline

A relationship that harms one of the partners is called

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Parasitism

Symbiosis

Commensalism

None

Which rule depicts its correct statement regarding temperature variation?

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Allen's Rule:

Birds and mammals have greater size in cold region

Bergman's Rule:

The tail snout and ears are smaller in colder region.

Jordan's Rule:

Birds in cold regions are with narrow wings.

All are false.

Bilirubin

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Turns skin Yellow

Damages brain cells

Causes jaundice

All of these

Which of the following organelle is not present in the synaptic knob

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Mitochondria

Vesicles

Ribosomes

Nucleus

Deficiency of sex hormones in adults results in

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Sexual immaturity

Mortality

UTI

sterility

Which of the following is true about mesoglea

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Acellular

Mesodermal

Cellular

Multicellular

On poles, the average temperature is

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Zero°C

5°C

Below freezing point

None

The second trophic level includes the:

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Producers

Tertiary consumers

Secondary consumers

Primary consumers

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

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Food chain

Food web

Both A and B

None of above

The organisms of same species live in a same place is called

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Community

Population

Consumers

All of these

Food web is the group of various

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Food substances

Food chains

Trophic levels

All of these

A little light is left to power photosynthesis at the depth of:

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500 feet

700 feet

600 Feet

1000 Feet

Vaccine for___ is under trial administration

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Hep A

Polio

Measles

AIDS

The ecosystem consists of two basic interacting components:

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Living and physical

Biotic and abiotic

Living and biotic

Both a & b

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

Non-neural cells which encapsule the axon of neurons are

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Microglial

Microbodies

Schwann cells

Companion cells

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

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Trypsin

Insulin

Keratin

Glucose

Genetic basis of ABO blood group system was explained by:

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Landsteiner

Levine

Bernstein

Carl Correns

Primary succession that starts on a dry soil or rock is called:

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Hydrosere

Derosere

Xerosere

Aquasere

The bond formed between glucose and fructose to form sucrose

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α 1 , 4 Glycosidic bond

β 1 , 4 Glycosidic bond

α 1 , 2 Glycosidic bond

β 1 , 2 Glycosidic bond

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

Enzymes present in human body generally have

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Same optimum temperature and optimum pH

Same optimum temperature but different optimum pH

Same optimum pH but different optimum temperature

Different optimum temperature and optimum pH

______ incorporate gaseous nitrogen from air into organic nitrogen containing compounds

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Nitrogen fixing bacteria

Nitrogen degrading bacteria

Both A and B

None of above

Radial symmetry is present in

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Adults of annelida

Adults of echinodermata

Adults of Cnidaria

Both B and C

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

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1%

2%

3%

5%

The gill pouches present in embryos of mammals :

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support that ontogeny recapitulates phylogeny

homologous structures

used by embryos to breathe

evidence for the degeneration

The neuron which has central and peripheral branches is

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Sensory neuron

Motor neuron

Associative neuron

Relay neuron

Herpes type-1 virus causes

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Pitted scars

Swollen neck

Rashes on genitals

Vascular lesions

Genes can be mapped on chromosomes on the basis of

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Sex linkage

Assortment

Recombination frequency

Gene sequencing

Sahara Desert i found in :

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Europe

America

Africa

Australia

Viruses are not resistant to

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Interferons

Penicillin

Streptomycin

Any antibiotic

Nitrogen makes up 78 percent of the gases in:

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Biosphere

Ecosphere

Lithosphere

Atmosphere

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

Succinic acid is the ____ of succinic dehydrogenase which undergoes____

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Active site, reduction

Prosthetic group, reduction

Substrate, oxidation

Substrate, reduction

Which type of hepatitis is called serum hepatitis

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Hepatitis A

Hepatitis B

Hepatitis C

Hepatitis D

The two linked genes A and B with a 30% recombination frequency must be

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15 units apart

30 units apart

60 units apart

90 units apart

_____is the study of interaction between living organism and their environment

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Evolation

Genetics

Ecology

Sociology

The average rainfall in desert ecosystem is:

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20 - 30 cm

20 - 40 cm

25 - 50 cm

14 - 35 cm

The term ecology comes form the ______ words oikos, meaning "The family household"

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Greek

Latin

English

French

When we study a single population relationship to its environment it will be called:

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Mycology

Synecology

Autecology

Ornithology

Xerosere starts with __________ stage.

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Crustose lichen

Foliose lichen

Mass

Shrub

Resting membrane potential of a neuron is

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50mV

-70mv

-80mV

90mV

Is is universally accepted by biologists that mammals have evolved from reptilian ancestors called …………

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Cotylosaurs

Dinosaurs

Cotylostomata

Amphibians

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

Pick up the example of a dinucleotide:

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ATP

GTP

ADP

NAD

DNA of non-virulent phage is

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Provirus

Prophage

Both

None

Optimum pH of all human enzymes is

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Variable

Same

Acidic

Alkaline

The last stage of plant succession is

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Pioneer

Climax

Community

None of above

Which of the following does not contain peptide bond

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Hemoglobin

Myoglobin

Insulin

Cutin

RNA and Proteins are components of

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Chromosomes

Receptors

Secretions

Ribosome

Formation of ES complex activates the______ site of an enzyme

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Active

Binding

Catalytic

Allosteric

Coniferous forests located at high latitude are called

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Boreal

Taiga

Tundra

Alpine

Digestive vacuoles are also called as

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Primary Lysosomes

Secondary Lysosomes

Phagocytic Vacuoles

Pinocytic Vacuoles

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

What is the 5th amino acid in sickle cell beta chain

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Histidine

Proline

Leucine

Valine

Dandruff is caused by

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Algae

Bacteria

Fungi

Virus

The succession which occurs in dry soil or rock is

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Hydrosere

Xerosere

Decrosere

All of these

In which types of soil does water logging occur?

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Silt

Clay

Gravel

Sand

Which of the following kind of inhibitors don’t compete for active site of enzyme

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Irreversible competitive

Reversible competitive

Reversible non competitive

Both b and c

We are reducing natural 'carbon dioxide's

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Sources

Sinks

Both

None

Excessive ploughing of lands in arid regions results in the development of

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Forest

Deserts

Grassland

Fields

Salt water ocean and sea are the largest ecosystem which cover __________ of earth surfaces.

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70%

71%

80%

65%

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

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Glyceraldehyde

Ribose

Glucose

Fructose

How many nitrogen atoms are found in lecithin

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1

2

3

4

Both Glycoprotein and glycolipids are components of

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Plant Cell walls

Algal Cell Walls

Fungal Cell Wall

Biological Membranes

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

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1

2

Both

3

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

The pairs of gills present in cyclostomata are

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5-7

10-12

6-14

4-5

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

Which one of the following always contains DNA?

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Centriole

Lysosome

Golgi apparatus

Mitochondrion

Charles Darwin was born in Shrewsbury, in Western England in

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1854

1807

1809

1866

The parasite that lives inside the body of the host is called as

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Endoparasite

Ectoparasite

Outer parasite

All of above

Pick up the most developed coelomates

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Echinoderms

Annelids

Chordates

Insects

In temperate grassland the rate primary production is about:

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700 - 1400 g/m²

700 - 1600 g/m²

700 -1800 g/m²

700 - 1500 g/m²