Zoology
The feeding reaction is evoked in Hydra by the presence of a chemical called:
A.
Methionine
B.
Glutathione
C.
Carbohydrase
D.
Glycolipids
Paramecium involves:
A.
Nuclear organisation followed by division of body in one individual
B.
Nuclear reorganisation occurring between the micronuclei of a single individual but not followed by division of body
C.
Two individuals fusing temporarily but there is no nuclear exchange between them
D.
Two individuals fusing and undergoing nuclear organisation by exchanging their micronuclei
Between a strongly lit zone and a zone of total darkness, Amoeba will prefer:
A.
Strongly lighted zone
B.
Zone of darkness
C.
An immediate zone between these two
D.
Amoeba is not sensitive to light
Which of the following theories about mechanism of locomotion in Amoeba is incorrectly attributed?
A.
Sol-gel theory - Mast and Patin
B.
Walking movement Theory - Jennings
C.
Surface tension theory - Berthold
D.
Folding and unfolding theory - Goldacre and Lorch
Which of the following is a marine reptile?
A.
Testudo
B.
Trionyx
C.
Chelone
D.
Teredo
Which of the following pairs is wrongly matched?
A.
Sea mouse - Aphrodite
B.
Sea cow - Dugong
C.
Sea fur - Aplysia
D.
Sea horse - Hippocampus
Which of the following is included in the same order as man?
A.
Lemur
B.
Pangolin
C.
Rabbits
D.
Kangaroo
Which of the following is a bird?
A.
Ichthyornis
B.
Ichthyophis
C.
Ichthyosaurus
D.
Ichthyostega
Flightless birds are grouped under super order:
A.
Odontognathae
B.
Palaeognathae
C.
Neognathae
D.
Archiornithes
Latimeria Belongs to class:
A.
Teleostomi
B.
Elasmobranchi
C.
Placodermi
D.
Holocephali
Which among the following is not represented in the oceans?
A.
Fishes
B.
Amphibians
C.
Reptiles
D.
Mammals
Each leg of periplaneta is divided into distinct limb-Segments. The correct order in which they are arranged from proximal to distal is:
A.
Tibia, Tarsus, Coxa, Trochanter, Femur
B.
Femur, Tarsus, Trochanter, Coxa, Tibia
C.
Tarsus, Femur, Tibia, Trochanter, Coxa
D.
Coxa, Trochanter, Femur, Tibia, Tarsus
The Medusoid stage is altogether absent in class:
A.
Scyphozoa
B.
Hydrozoa
C.
Anthozoa
D.
Heliozoa
Which of the following class comprises of mostly free-living forms?
A.
Nematoda
B.
Cestoda
C.
Turbellaria
D.
Trematoda
The hydrophillic nature of DNA is due to the presence of:
A.
Phosphate group
B.
Deoxyribose sugar
C.
Thymine base
D.
A number of hydrogen bond
Which of the following is not true?
A.
Somatic mutation occurs in a body cell
B.
Spontaneous mutations occur suddenly in nature and their origin is unknown
C.
Mutations are very common in nature
D.
Most of the genes are relatively stable
The law of segregation states that the two contrasting factors present together in a heterozygote:
A.
Are sorted out mixed into the gametes
B.
Are sorted out unmixed into the gametes
C.
Are contaminated
D.
Exert influence on the same structure
In Dorsophila white eye colour is sex-linked recessive character and the allelic gene for red eye dominate. A white-eyed female is mated with a red-eyed male. What percent of the female offspring can be expected to have red eyes?
A.
0%
B.
25%
C.
50%
D.
100%
Any human male who carries a sex-linked gene on the X-chromosomes will transmit that gene to:
A.
50% of his daughters
B.
50% of his sons
C.
All of his daughters
D.
all of his sons
Cilia and flagella consist of:
A.
7 outer fibrils around 2 central fibrils
B.
9 outer fibrils around 2 central fibrils
C.
9 outer fibrils around 1 central fibrils
D.
7 outer fibrils around 1 central fibrils
Which one of the following pairs is not exactly matched?
A.
Prismatic layer of shell of Unio - Pearl formation
B.
Obelia colony - Polymorphism
C.
Eye of Cockroach - Mosaic vision
D.
Pedicellariae of Starfish - Gill for smooth respiration
Mark the correct sequence of the Prophase-I of meiosis:
A.
Proleptotene - Leptotene - Zygotene - Pachytene - Diplotene - Diakinesis
B.
Zygotene - Prolaptotene - Leptotene - Pachytene - diplotene - Diakinesis
C.
Diplotene - Diakinesis - Proleptotene - Leptotene - Zygotene
D.
Diakinesis - Diplotene - Proleptotene - Leptotne - Zygotene
Dividing cells are most sensitive to X-rays during the period :
A.
Of prophase
B.
Prior to the onset of mitosis
C.
After the onset of mitosis
D.
Of Telophase
Active transport across the cell membrane involves the movement of molecules and ions:
A.
From high to low concentration in a chemical gradient or an electrochemical gradient
B.
From high to low concentrations in a physical gradient
C.
Against the gradient and also through either a carrier process or another energy dependent process
D.
Against the gradient and is an energy from process
Nosema bombosis is a pebrine disease of:
A.
Honey bee
B.
Silkworm
C.
Lac insect
D.
All of these