NEET Biology MCQs – Muscular System

NEET Biology MCQs – Muscular System

Question 1. Immediate Source Of Energy For Muscle Contraction  Is:

1. Glucose
2. Gtp
3. Creatine Phosphate
4. ATP

Answer: 4. ATP

Question 2.  Which One Yields ATP Required For Muscle Contraction?

1. Myoglobin
2. Creatine Phosphate
3. Creatinine Phosphate
4. Myosin.

Answer: 2. Creatine Phosphate

Question 3. Edta Injected Into Muscles Combines With Ca₂⁺ And :

1. Stops Contraction
2. Causes Contraction
3. Slows Down Contraction
4. None Of The Above.

Answer: 1. Stops Contraction

Question 4. What Is Sarcomere?

1. Part Between Two H-Line
2. Part Between Two A-Line
3. Part Between Two I-Band
4. Part Between Two Z-Iine.

Answer: 4. Part Between Two Z-Iine.

Question 5. Which Statement Is Correct For Muscle Contraction?

1. Length Of H-Zone Becomes Decreased
2. Length Of A-Band Remains Constant
3. Length Of I-Band Becomes Increased
4. Length Of Two Z-Line Become Increase,

Answer: 1. Length Of H-Zone Becomes Decreased

Question 6. Light Band Has Which Of The Following Filament Protein ?

1. Myosin
2. Actin
3. Both 1 & 2
4. None Of These.

Answer: 2. Actin

Question 7. Largest Skeletal Muscle Is Present In :

1. Thigh
2. Neck
3. Arm
4. Belly.

Answer: 1. Thigh

Question 8. Hinge Joint Is Present In :

1. Elbow
2. Pivot
3. Interphalangeal
4. Atlas.

Answer: 1. Elbow

Question 9. Biceps & Triceps Are Found In :

1. Fore Arm
2. Upper Arm
3. Thigh
4. Shoulder.

Answer: 2. Upper Arm

Question 10. Actin Filaments Depolymerise And Repolymerise In Motile Cells With :

1. 0.2 – 0.3 Millisecond
2. 1.0 – 2.0 Minutes
3. 1 – 2 Hours
4. 2-3 Days.

Answer: 1. 0.2 – 0.3 Millisecond

Question 11. Sacromere Occurs Between :

1. Z – Line To Z – Line
2. Two I – Bands
3. Two Surfaces Of A Z – Line
4. Two A – Bands.

Answer: 1. Z – Line To Z – Line

Question 12. “All Or None Law” Is Not Associated With .

1. Muscle Fibre
2. Tiruiun
3. Cardiac Muscle
4. Uriniferous Tubules

Answer: 4. Uriniferous Tubules

Question 13. ATPase Enzyme  Needed For Muscle Contraction Is Located In :

1. Myosin
2. Actin
3. Actinin
4. Troponin.

Answer: 1. Myosin

Question 14. Which Of The Following Is Important For Muscle Contraction And Nerve Impulse Transmission ?

1. Ca_2⁺ Ions
2. Ca⁺⁺ And Mg⁺⁺ Ions
3. Mg⁺ ₄– Ions
4. Fe _2⁺ Ions.

Answer: 2. Ca⁺⁺ And Mg⁺⁺ Ions

Question 15. During Strenuous Exercise Glucose Is Converted Into :

1. Glycogen
2. Pyruvic Acid
3. Starch
4. Lactic Acid.

Answer: 4. Lactic Acid.

Question 16. Which Of The Following Is Not Syncytial ?

1. Cardiac Muscle
2. Skeletal Muscle
3. Smooth Muscle
4. Interstitial Muscle.

Answer: 3. Smooth Muscle

Question 17. The Condition In Which A Number Of Nuclei Are Present In A Muscle Fibre Is Called :

1. Coenocytic
2. Syncytial
3. Polykaryon
4. Endoduplicaton.

Answer: 2. Syncytial

Question 18. Contractile Tissues Have The Following Features :

A. Mesodermal In Orign

B. They Contain Stretch Receptors.

C. Rhythmic Contractions Are Seen In Them

D. Hey Do Not Fatigue During The Life Of The Animal.

Which Of The Above Are Characteristics Of Sphincters ?

1. All The Four
2. Only A, B And C
3. Only A, B And D
4. Only A, C And D.

Answer: 2. Only A, B And C

Question 19. The Lactic Acid Generated During Muscle Contraction Is Converted To Glycogen In :

1. Muscle
2. Kidney
3. Pancreas
4. Liver.

Answer: 2. cAMP

Question 20. In Heart Cells, Which One Serves As A Second Messenger, Speeding Up Muscle Cell Contraction In Response To Adrenaline ?

1. cAMP
2. cGMP
3. GTP
4. ATP
5. AMP.

Answer: 1. cAMP

Question 21. The Contractile Protein Of Skeletal Muscle Involving Atpase Activity Is :

1. Troponin
2. A-Actin
3. Tropomyosin
4. Myosin.

Answer: 4. Myosin.

Question 22. The Globular Protein Molecule, Which Masks The Active Sites On The F-Actin Is :

1. Troponin
2. Myosin
3. Tropomyosin
4. Light Mbromyosin
5. Heavy Meromyosin.

Answer: 1. Troponin

Question 23. Statements :

A. A-Bands Of The Muscle Is Dark And Contain Myosin

B. I-Hamls Air The Light Hands Ami Contain Actin

C. During Muscle Contraction The A-Band Contracts

D. The Part Between The Two Z-Lines Is Called As Sacromere

E. The Central Pan Of Thin Filament, Not Overlapped By Thick Filament Is Called H-Zone.

Of The Above Statements.

1. A, C, E Are Correct While B And D Are Incorrect
2. A, B, C And C Are Correct While D Is Incorrect
3. A, B And C Are Correct While D And C Are Incorrect
4. A, B And D Are Correct While C And C Are Incorrect
5. A And B Are Correct While C, D And E Are Incorrect.

Answer: 4. And B Are Correct While C, D And E Are Incorrect.

Question 24. All Or None Law Is Not Applicable To :

1. Whole Skeletal Muscle
2. Single Skeletal Muscle Fibre
3. Whole Cardiac Muscle
4. Single Smooth Muscle Fibre.

Answer: 1. Whole Skeletal Muscle

Question 25. The H-Zonc In The Skeletal Muscle Fibre Is Due To :

1. The Central Gap Between Myosin Filaments In The A-Band.
2. The Central Gap Between Actin Filaments Extending  Through Myosin Filaments In The A Band.
3. Extension Of Myosin Filaments In The Central Portion Of The A – Band.
4. The Absence Of Myofibrils In The Central Portion Of A-Band.

Answer: 2. The Central Gap Between Actin Filaments Extending  Through Myosin Filaments In The A Band.