Match Column-I with Column-II:

Column-I Column-II
A.   Structural and functional unit of a myofibril
B.   Protein of thin filament
C.   Protein of thick filament
D.   The central part of thick filament not overlapped by thin filament
I. H-zone
II. Myosin
III. Sarcomere
IV. Actin

(1) A - I, B - II, C - III, D - IV

(2) A - I, B - III, C - II, D - IV

(3) A - I, B - IV, C - III, D - II

(4) A - III, B - IV, C - II, D - I

Subtopic:  Skeletal Muscle: Sarcomere |
 93%
From NCERT
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Sarcomere is the area between:

(1) 2 H-zones       

(2) 2 Z-lines                  

(3) 2 M-lines                  

(4) 2 A-bands

Subtopic:  Skeletal Muscle: Sarcomere |
 88%
From NCERT
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Light bands (thin filaments) contain actin and are called:

(1) A-bands or Isotropic band            

(2) A-bands or Anisotropic bands

(3) I-bands or Isotropic bands           

(4) I-bands or Anisotropic bands

Subtopic:  Skeletal Muscle: Sarcomere |
 84%
From NCERT
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Dark bands (thick filaments) contain myosin and are called:

(1) A-bands or Isotropic band            

(2) A-bands or Anisotropic bands

(3) I-bands or Isotropic bands           

(4) I-bands or Anisotropic bands

Subtopic:  Skeletal Muscle: Sarcomere |
 92%
From NCERT
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Choose the letter from the figure that most appropriately corresponds to the structure:

I.A-band       II. I-band           III.    Sarcomere         IV.     H-zone

V.Myosin       VI.Actin, Troponin, Tropomyosin             VII.   Z –line

(1) I - E, II - D, III - F, IV - G, V - B, VI- C, VII - A

(2) I - E, II - D, III - C, IV - G, V - B, VI - A, VII - F

(3) I - E, II - D, III - F, IV - G, V - C, VI - A, VII - B

(4) I - E, II - D, III - F, IV - A, V - B, VI - C, VII - G

Subtopic:  Skeletal Muscle: Sarcomere |
 82%
From NCERT
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh

The functions of tropomyosin in skeletal muscle include:
(1) Sliding on actin to produce shortening

(2) Release Ca+2 after initiation of contraction

(3) Acting as "relaxing protein" at rest by covering up the sites where myosin binds to actin

(4) Generates ATP

Subtopic:  Skeletal Muscle: Myofilaments |
 65%
From NCERT
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Ca+2 bind ________ in the skeletal muscles and leads to exposure of the binding site for ________ on the filament _______:

(1) Troponin, myosin, actin                

(2) Troponin, actin, relaxin

(3) Actin, myosin, troponin                

(4) Tropomysin, myosin, actin

Subtopic:  Excitation Contraction Coupling I |
 82%
From NCERT
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Following is the figure of actin (thin) filaments. Identify A, B and C:

1. A - Tropomyosin, B - Troponin, C - F-actin

2. A - Troponin, B - Myosin, C - Tropomyosin

3. A - Troponin, B - Tropomyosin, C - Myosin

4. A - Troponin, B - Tropomyosin, C - F-actin

Subtopic:  Skeletal Muscle: Myofilaments |
 77%
From NCERT
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh

The above figure is related with myosin monomer (meromyosin). Identify A to C:

(1) A - head, B - cross arm, C - GTP binding sites

(2) A - head, B - cross arm, C - Ca+2 binding sites

(3) A - head, B - cross arm, C - ATP binding sites

(4) A - cross arm, B - head, C - ATP binding sites

Subtopic:  Skeletal Muscle: Myofilaments |
 89%
From NCERT
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh

The action potential that triggers a muscle contraction travels deep within the muscle cell by means of:

(1) Sarcoplasmic reticulum                

(2) Transverse tubules

(3) Synapse                                      

(4) Motor end plates

Subtopic:  Excitation Contraction Coupling I |
To view explanation, please take trial in the course.
NEET 2021 - Achiever Batch - Aryan Raj Singh
Hints