HARD
Earn 100

Read the statements regarding muscle proteins.

1. Actin is a thin filament and is made up of two F-actins.

2. The complex protein, tropomyosin is distributed at regular inervals of troponin.

3. Myosin is a thick filament which is also a polymerized protein.

4. The globular head of meromyosin consists of light meromyosin (LMM).

Which of the above statements are correct?

80% studentsanswered this correctly

Important Questions on Structural Organisation in Animals

EASY
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
Myoglobin helps in the transport of oxygen in _______.
EASY
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
Identify the correct statement with reference to shortening of sarcomere
EASY
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
Which one of the following proteins does not play a role in skeletal muscle contraction?
EASY
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
The part of sarcomere that contains both thick and thin filaments are present in ________.
MEDIUM
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
Sliding filament theory can be best explained as:
MEDIUM
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
Which of the following statements about muscles are correct?
(i) Muscles show three essential properties such as excitability, conductivity and contractility.
(ii) Muscular tissue is endodermal in origin except muscle of iris and ciliary body.
(iii) The cytoplasm of muscle fibre has several myofibrils.
(iv) Skeletal muscles exhibit slow and prolonged contractions.
(v) The regular arrangement of myosin and actin filaments is responsible for alternate dark and light bands of striated muscle.
EASY
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
Arrange the following in a sequence from edge to centre in a sarcomere.
A) M-line
B) Z-line
C) H-zone
D) I-band
EASY
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
Assertion (A) : Skeletal muscle fibre is in syncytial state
Reason (R):  It is formed by fusion of cells
EASY
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
Name the ion responsible for the unmasking of active sites for myosin for cross-bridge activity during muscle contraction.
MEDIUM
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
Which of the following is not a character of red muscle?
MEDIUM
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
Choose the incorrect statement about muscle contraction from the following:
MEDIUM
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
Statement I: T- tubule of muscle fibre and the two terminal cisternae at its sides from the triad system
Statement II: Actin is a motor protein that is able to convert chemical energy into mechanical energy
HARD
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
Calcium important in skeletal muscle contraction because 
HARD
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue

During muscular contraction which of the following events occur?
(a) 'H' zone disappears
(b) 'A' band widens
(c) 'I' band reduces in width
(d) Myosin hydrolyzes ATP, releasing the ADP and Pi
(e) Z-lines attached to actins are pulled inwards.

Choose the correct answer from the options given below.

HARD
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
Which type of tissue is correctly paired with its location?
EASY
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue

Assertion (A): Skeletal muscles have very limited power of regeneration.

Reason (R): Satellite cells are present in them.

The correct option among the following is

HARD
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
Due to constant writing, muscles of hands show fatigueness because_____.
EASY
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
Neurotransmitter released at the neuromuscular junction of a voluntary muscles is:
EASY
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
Regulatory proteins in a myofibril are
MEDIUM
Biology>Structural Organisation in Organisms>Structural Organisation in Animals>Animal Tissue
Assertion (A): Light meromyosin and Heavy meromyosin are often called regulatory proteins.
Reason (R): The above said molecules have a role in masking and unmasking the active sites on actin.