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MEDIUM
ENGLISH
Biology
In a hot summer after noon, if your body’s Homeostatic machinery keep your internal temperature quite lower than that of external than this is an example of____________?
A
Positive feed back
Option A
B
Negative feed back
Option B
C
Feed back
Option C
D
Osmoregulation
Option D
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MEDIUM
ENGLISH
Biology
Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining.
A
Excessive urea which will increase their internal solute concentration and prevent body shrinkage in hypertonic environment
Option A
B
Trimethyl alanine
Option B
C
Ammonia
Option C
D
Trimethylamine oxide
Option D
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MEDIUM
ENGLISH
Biology
Which one of the following forms the blk of exoskeleton of an arthropod?
A
Epicuticle
Option A
B
Procuticle
Option B
C
Ectocuticle
Option C
D
None of these
Option D
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MEDIUM
ENGLISH
Biology
What happens during muscle contraction to the length of each myosin and action filament?
A
Z- lines get closer
Option A
B
A band becomes short
Option B
C
1 band elongates
Option C
D
There is no change in sarcomere
Option D
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MEDIUM
ENGLISH
Biology
Which of the following step occurs immediately after binding of Ca2+ with troponin molecule during muscle contraction.
A
Binding sites of actin get attached to the myosin head.
Option A
B
Troponin uncovers the actin binding sites.
Option B
C
Tropomyosin gets removed from the binding sites of actin filaments.
Option C
D
Ca2+ goes back inside sarcoplasmic reticulum.
Option D
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MEDIUM
ENGLISH
Biology
Exoskeleton of a marine snail is composed of________________?
A
CaPO4
Option A
B
CaCO3
Option B
C
CaSO4
Option C
D
SiO2
Option D
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MEDIUM
ENGLISH
Biology
Rigor mortis i.e, stiffening of body after death results from__________?
A
Accunulation of rigid proteins molecules in sarcoplam.
Option A
B
Unavailability of ATP, which is necessary to break the link between actin and myosin.
Option B
C
Decrease in body temperature after death.
Option C
D
Death of tissue due to unavailability of O2.
Option D
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MEDIUM
ENGLISH
Biology
Which of the following statement about an arthropod exoskeleton is incorrect?
A
It permits gaseous exchange
Option A
B
It contains joints, for the same purpose as present in human skeletal system
Option B
C
It provides muscle attachment
Option C
D
Like all the other types of exoskeleton, they lack sensation
Option D
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MEDIUM
ENGLISH
Biology
Ecdysone is_________________?
A
An enzyme that digest endocuticle during an arthropodal ecdysis
Option A
B
A newly formed exoskeleton in authropods
Option B
C
A hormone that regulates moulting in arthropods
Option C
D
A process that involves moulting
Option D
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MEDIUM
ENGLISH
Biology
Endoskeleton is secreted by?
A
Ectoderm.
Option A
B
Endoderm.
Option B
C
Mesoderm.
Option C
D
All of these
Option D
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MEDIUM
ENGLISH
Biology
Which of the following statement about fatigue is correct?
A
The major event in it is accumulation of lactic acid.
Option A
B
Lactic acid accumulation turns pH in acidic range leading to muscle ache.
Option B
C
Ionic imbalance may also cause it.
Option C
D
All of these
Option D
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MEDIUM
ENGLISH
Biology
Tetany is caused by__________?
A
Hypocalcemia
Option A
B
Hypercalcemia
Option B
C
Clostridum tetani.
Option C
D
Low O2 level
Option D
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MEDIUM
ENGLISH
Biology
Collagen fibers of bone are hardened by deposition of_____________?
A
Ca & PO4
Option A
B
CaCO3
Option B
C
CaSO4
Option C
D
SiO2
Option D
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MEDIUM
ENGLISH
Biology
Which one of the following is an example of a non-elastic connective tissue?
A
Ligaments.
Option A
B
Tendon
Option B
C
Muscles.
Option C
D
None of these
Option D
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MEDIUM
ENGLISH
Biology
Which one of the following is avascular structure?
A
A compact bone.
Option A
B
A spongy bone.
Option B
C
Cartilage
Option C
D
All of these
Option D
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MEDIUM
ENGLISH
Biology
Which of the following muscle is an antagonistic member of Biceps brachii?
A
Bracheoradialis
Option A
B
Brachialis.
Option B
C
Intercostals
Option C
D
Triceps
Option D
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MEDIUM
ENGLISH
Biology
Which of the following bone is not present in the hind-limb?
A
Femur
Option A
B
Tibia
Option B
C
Radius
Option C
D
Fibula
Option D
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MEDIUM
ENGLISH
Biology
Insertion of Biceps is on_________?
A
Ulna
Option A
B
Radius
Option B
C
Olecronon process of ulna.
Option C
D
Scapula
Option D
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MEDIUM
ENGLISH
Biology
How many bones are present in the wrist?
A
4 bones
Option A
B
6 bones
Option B
C
8 bones
Option C
D
14 bones
Option D
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MEDIUM
ENGLISH
Biology
Which of the following statement is incorrect regarding the locomotion in Euglena?
A
Move with the help of flagellum, attached to the anterior pole of the body.
Option A
B
Flagellum whipping backwards moving the organism forward, and when moves forward the organism moves backward.
Option B
C
Myonemes can change the direction of the body by making it to shorten from anterior to the posterior pole.
Option C
D
None of these
Option D
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