The foetal membrane that forms the basis of the umbilical cord is _____.

(a)

Allantois

(b)

Amnion

(c)

Chorion

(d)

Yolk sac

A marriage between a colourblind man and a normal woman produces _______.

(a)

All carrier daughters and normal sons

(b)

50% carrier daughters, 50% normal daughters

(c)

50% colourblind sons, 50% normal sons

(d)

All carrier offsprings

A mRNA molecule is produced by _____.

(a)

Replication

(b)

Transcription

(c)

Duplication

(d)

Translation

Which of the following statements is not true about DNA replication in eukaryotes?

(a)

Replication begins at a single origin of replication.

(b)

Replication is bidirectional from the origins.

(c)

Replication occurs at about 1 million base pairs per minute

(d)

There are numerous different bacterial chromosomes, with replication ocurring in each at the same time.

Who published the book “Origin of species by Natural Selection” in 1859?

(a)

Charles Darwin

(b)

Lamarck

(c)

Weismann

(d)

Hugo de Vries

Exo-erythrocytic schizogony of Plasmodium takes place in _______

(a)

RBC

(b)

Leucocytes

(c)

Stomach

(d)

Liver

B cells that produce and release large amounts of antibody are called

(a)

Memory cells

(b)

Basophils

(c)

Plasma cells

(d)

killer cells

The purpose of biological treatment of waste water is to _______

(a)

Reduce BOD

(b)

Increase BOD

(c)

Reduce sedimentation

(d)

Increase sedimentation

How many amino acids are arranged in the two chains of Insulin

(a)

Chain A has 12 and Chain B has 13

(b)

Chain A has 21 and Chain B has 30 amino acids

(c)

Chain A has 20 and Chain B has 30 amino acids

(d)

Chain A has 12 and chain B has 20 amino acids.

PCR proceeds in three distinct steps governed by temperature, they are in order of

(a)

Denaturation, Annealing, Synthesis

(b)

Synthesis, Annealing, Denaturation

(c)

Annealing, Synthesis, Denaturation

(d)

Denaturation, Synthesis, Annealing

Organisms which can survive a wide range of temperatuer are called

(a)

Ectotherms

(b)

Eurytherms

(c)

Endotherms

(d)

Stenotherms

The interaction in nature, where one gets benefit on the expense of other is...

(a)

Predation

(b)

Mutualism

(c)

Amensalism

(d)

Commensalism

The figure given below is a diagrammatic representation of response of organisms to abiotic factors. What do A, B and C represent respectively.

(a)

A	B	C
Conformer	Regulator	Partial Regulator

(b)

A	B	C
Regulator	Partial Regulator	Conformer

(c)

A	B	C
Partial Regulator	Regulator	Conformer

(d)

A	B	C
Regulator	Conformer	Partial Regulator

Which of the following is correct for r-selected species

(a)

Large number of progeny with small size

(b)

large number of progeny with large size

(c)

small number of progeny with small size

(d)

small number of progeny with large size

Animals that can move from fresh water to sea called as______

(a)

Stenothermal

(b)

Eurythermal

(c)

Catadromous

(d)

Anadromous

Which of the following is considered a hotspots of biodiversity in India?

(a)

Western ghats

(b)

Indo-gangetic plain

(c)

Eastern Himalayas

(d)

Both (a) and (c)

The organization which published the red list of species is

(a)

WWF

(b)

IUCN

(c)

ZSI

(d)

UNEP

Assertion(A): The Environmental conditions of the tropics are favourable for speciation and diversity of organisms.
Reason(R): The climate seasons, temperature, humidity and photoperiod are more or less stable and congenial.

(a)

Both Assertion and Reason are true and Reason explains Assertion correctly.

(b)

Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

(c)

Assertion is true, but Reason is false.

(d)

Both Assertion and Reason are false.

Which among the following is the most abundant Green-House-Gas (GHG) in the earth’s atmosphere?

(a)

Carbon dioxide

(b)

Water Vapour

(c)

Sulphur Dioxide

(d)

Tropospheric Ozone

As per 2017 statistics, the highest per capita emitter of Carbon dioxide in the world is

(a)

USA

(b)

China

(c)

Qatar

(d)

Saudi Arabia

The use of microorganism metabolism to remove pollutants such as oil spills in the water bodies is known as

(a)

Biomagnification

(b)

Bioremediation

(c)

Biomethanation

(d)

Bioreduction

Which among the following always decreases in a Food chain across tropic levels?

(a)

Number

(b)

Accumulated chemicals

(c)

Energy

(d)

Force

The Hydrochlorofluorocarbons (HCFCs) are the compounds which have the following molecules:

(a)

Hydrogen

(b)

Carbon

(c)

Chlorine

(d)

Fluorine

SMOG is derived from:

(a)

Smoke

(b)

Fog

(c)

Both (a) and (b)

(d)

Only A

Excess of fluoride in drinking water causes:

(a)

Lung disease

(b)

Intestinal infection

(c)

Fluorosis

(d)

None of the above