Zoology
Cleavage differs from mitosis in that:
A.
It occurs in zygote
B.
It results in identical daughter cells
C.
It occurs only in invertebrates
D.
It occurs in only vertebrates
The first cleavage plane of eggs of higher mammals is:
A.
Meridional plane
B.
Vertical plane
C.
Equatorial plane
D.
Latitudnal plane
The correct sequence of gametogenesis is:
A.
Mutiplication phase - Growth phase - Maturation phase
B.
Growth phase - Multiplication phase - Maturation phase
C.
Maturation phase - Growth phase - Multiplication phase
D.
Multiplication phase - Maturation phase - Growth phase
In all groups of animals male gametesare produced is enormous numbers. The main significance of this is that:
A.
A female gamete under normal conditions does not go unfertilized by sperm
B.
Many sperms are required in Fertlization
C.
Many sperms will introduce more inheritable characteristics
D.
All of these
During external fertilization the male and female gametes recognize and get attached to each other, due to:
A.
Fertilizin - Antifertilizin Reaction
B.
Mobility of sperm
C.
Similar surface membranes
D.
None of these
The fusion of male and female nucleus is termed as:
A.
Apomixis
B.
Amphimixis
C.
Double fertilization
D.
Epiauxesis
Acrosomes is derived from the:
A.
Golgi complex of sperm
B.
Mitochondria of sperm
C.
Golgi complex of ovum
D.
Lysosome of sperm
proenzyme is the:
A.
Active form of enzyme
B.
Inactive form of enzyme
C.
Precursor of enzyme
D.
Inhibitor of enzyme
Calcium ion is associated with the conversion of:
A.
Prothrombin into thrombin
B.
Trysinogen itno Trypsin
C.
Chymotrypsinogen into Chymotrypsin
D.
Glucose into Glycogen
During meiosis,chiasma are observed at pachytene.Presence of chiasmata reduces the possibility of another occuring in the near vicnity.This phenomenon is called:
A.
Interference
B.
Position Effect
C.
Coupling and Repulsion
D.
Cis-trans Effect
Thrombosis is the:
A.
Clotting of blood inside the blood vessel
B.
Clotting of blood inside the heart
C.
Failure of blood clotting mechanism
D.
Clotting of blood inside the brain
If a cat is inverted and dropped from a certain height, the animal lands on its feet.This balancing phenomenon is more in quadripedal animal.It is by:
A.
The balancing mechanism of brain
B.
The balancing mechanism of limbs
C.
The balancing mechanism of thoracic muscles
D.
The balancing mechanism of otolith of era
Diuresis condition:
A.
Increase the volume of urine excreted
B.
Decrease the volume of urine excreted
C.
Decrease the electrolytic balance
D.
Increase the electrolytic balance
The precursors for the formation of fatty acids are provided by:
A.
Vitamin A
B.
Acetyl CoA
C.
Glucose
D.
Fructose
Enzymes play very important role in living system by way of:
A.
Catalysing biochemical reaction
B.
Synchronizing nervous mechanism
C.
Supplementing food substance
D.
Controlling behaviour pattern
Protoplasm is commonly divided into somatoplasm and germ plasm, which respectively give rise to somatic cells and germ cells.In the next generation:
A.
Only somatic cells are passed and germ cells die with the individual
B.
Only germplasm is transmitted and the somatoplasm is formed a new at each generation
C.
Both type of cells are passed from parents to the offspring
D.
Neither somatopalsm nor germpalsm is transmitted
The principal site for the absorption of digested food materials is the:
A.
Duodenum
B.
Ilium
C.
Small intestine
D.
Large intestine
Which of the following statement is not true?
A.
In duodenum the pancreatic and juices mix with chyme.
B.
In pancreatic juice typsin and chymotrypsin are found in the form of trypsmogen and chymotrypsinogen respectively
C.
The pancreatic juice is slightly acidic
D.
None of these
Saliva is a viscous and colourless fluid with a pH of:
A.
3.2 to 4.2
B.
4.2 to 5.2
C.
5.2 to 6.4
D.
6.2 to 7.4
The toatal gain in ATP molecules glycolysis in the presence of oxygen is:
A.
2
B.
4
C.
5
D.
8
The upper jaw is fused to the skull and the lower jaw is suspended from it and hyoid arch is complete and not attached to the skull in ___________ jaw suspension.
A.
Monimostylic
B.
Holostylic
C.
Streptostylic
D.
Hyostylic
Phytotron is a facility to:
A.
Grow plants under disease- free conditions
B.
Conserve endangered species of the plants
C.
Grow plants under controlled conditions
D.
Induce mutation
The mixtures in which solid particles of more than 100 microns are distributed in a medium is called:
A.
Solution
B.
Suspension
C.
Colloid
D.
None of these
A spleen is a dark red organ found in all vertebrates except cyclostomes and:
A.
Urodeles
B.
Anura
C.
Dipnoi
D.
Birds
The circular , biconcave and non-nucleated erythrocytes are found in:
A.
Fish
B.
Birds
C.
Reptiles
D.
Mammals