Zoology
Which of the following is not an echinodermal character?
A.
Water vascular system of coelomic origin
B.
Bilateral symmetry
C.
Universal presence of mouth and anus
D.
Body externally covered with spines
Which of the following is false about cyclostomes?
A.
Exoskeleton is lacking
B.
Spleen is absent
C.
Tongue is with epidermal teeth
D.
Petromyzon lives both in fresh water and marine water
The greatest and most convincing resemblance between the larvae of Hemichordates and Echinoderms which establishes a close relationship and common ancestry between them is:
A.
The vascular system
B.
The gill clefts
C.
The coelom
D.
The alimentary canal
Which of the following is characterised by the presence of a crop, gizzard and three chambered cloaca?
A.
Earthworm
B.
Leech
C.
Varanus
D.
Parakeet
Heloderma, the only known poisonous lizard in the world is mostly found in:
A.
African deserts
B.
Mongolian deserts
C.
American deserts
D.
Australian deserts
Which on the following is wrongly matched?
A.
Exocoetus - Order Beloniformes
B.
Hippocampus - Order Syngathiformes
C.
Labeo - Order Perciformes
D.
Channa - Order Ophiocephaliformes
Polygordius is a marine:
A.
Crustacean
B.
Cephalopod
C.
Archiannelid
D.
Oligochaete
Which one of the following is true about class cestoda?
A.
Ectoparasite on the body of fish
B.
Alimenatry canal is bifid and branched
C.
Sense organ are well developed
D.
Scolex with suckers or/and hooks
Phasmidia is a class of phylum:
A.
Annelida
B.
Platyhelminthes
C.
Nematoda
D.
Echinodermata
Golgi complex was first observed by:
A.
Camilo Golgi (1898)
B.
George (1867)
C.
Burgos (1955)
D.
J.Rhodin (1954)
The Nobel prize for 1968 was awarded to Khorana, Holley and Nirenberg for:
A.
Cracking the genetic code
B.
Synthesis of gene
C.
Artificial synthesis of DNA
D.
Synthesis of RNA
For the production of monoclonal antibody, which of the following cell lines is used?
A.
Chinese hamster ovary (CHO) cells
B.
Myeloma cells
C.
Hela cells
D.
Fibroblast cells
Lysosomes are reservoirs of:
A.
Hydrolytic enzymes
B.
Secretory glycoproteins
C.
fats
D.
RNA
The similarity between DNA and RNA is that:
A.
Both are double stranded
B.
Both have similar sugar
C.
Both are polymers of nucleotides
D.
Both have similar pyrimidines
For a reciprocal exchange between two non homologous chromosomes, the essential requirement is:
A.
At least two breaks on each chromosomes
B.
At least one break on each chromosomes
C.
Only one break on any one of the chromosomes
D.
One break on one chromosomes and two breaks on the other
Blood group of an individual is determined by:
A.
Shape of RBCs
B.
Combination of RBCs and WBCs
C.
Gene carried by individual
D.
Nature of haemoglobin
Pellagra is caused due to the deficiency of:
A.
Thiamine
B.
Calciferol
C.
Nicotinic acid
D.
Ascorbic acid
Bees and guided to visit the same flowers by the:
A.
Smell of earlier bees left upon the flowers
B.
Smell of the flowers
C.
Smell of the flowers and earlier bees
D.
Shape of the flowers
Among the silkworm found in different parts of India, the one domestical and exploited most for commercial silk production is:
A.
Bombyx mori
B.
Antheraea assama
C.
Antheraea pernyi
D.
Attacus altas
Which of the following is a beneficial insect?
A.
Ades aegypti
B.
Stagomants
C.
Vespa orientails
D.
Lepisma saccharina
Maximum lac producing country in the world is:
A.
India
B.
China
C.
Sri lanka
D.
Thailand
Besides primary constriction, there is a secondary constriction in some chromosomes, which is known as:
A.
Centromere
B.
Telomere
C.
Nucleolar organiser region
D.
Chromonema
The number of eggs or youngs produced per litre is:
A.
Directly proportional to parental care
B.
Inversely proportional to parental care
C.
Independent of parental care
D.
Directly related to the number of sexually matured organisms in a population
The chief constituent of photochemical smog is:
A.
Carbon Monoxide
B.
Nitrogen Dioxide
C.
Sulphuric Acid
D.
Chlorine
"Greenhouse effect" is caused due to:
A.
Very high level of CO2 in atmosphere
B.
Accumulation of sulphuric acid in the atmosphere
C.
Formation of ozone hole
D.
Excess of Fluorocarbons in the atmosphere