If a cross section of a sarcomere is seen, each myosin is surrounded by how many actin molecules:
(A) 9
(B) 5
(C) 6
(D) 7
Which of the following statement is incorrect about Molluscans?
(A) They are surrounded by single or double pieces of hard skeleton.
(B) Their shell grows as the animal grows.
(C) They have hydrostatic skeleton.
(D) They move by tube feet
The most important function of troponin is___________?
(A) To bind with actin
(B) To bind with tropomyosin.
(C) To bind with Ca2+ ions.
(D) All of these
Which of the following bone is not present in the hind-limb?
(A) Femur
(B) Tibia
(C) Radius
(D) Fibula
Which of the following muscle is an antagonistic member of Biceps brachii?
(A) Bracheoradialis
(B) Brachialis.
(C) Intercostals
(D) Triceps
Which one of the following is avascular structure?
(A) A compact bone.
(B) A spongy bone.
(C) Cartilage
(D) All of these
Which one of the following is an example of a non-elastic connective tissue?
(A) Ligaments.
(B) Tendon
(C) Muscles.
(D) None of these
Collagen fibers of bone are hardened by deposition of_____________?
(A) Ca & PO4
(B) CaCO3
(C) CaSO4
(D) SiO2
Tetany is caused by__________?
(A) Hypocalcemia
(B) Hypercalcemia
(C) Clostridum tetani.
(D) Low O2 level