Download CBSE Sample Paper 2024-25 for class 12th to 8th

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Locomotion and ...

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Question 1
1 / -0

Which one of the following pairs of chemical substances is correctly categorized?

A
Calcitonin and thymosin - Thyroid hormones

B
Pepsin and prolactin - Two digestive enzymes secreted in stomach

C
Troponin and myosin - Complex proteins in striated muscles

D
Secretin and rhodopsin - Polypeptide hormones

Question 2
1 / -0

The important muscle proteins that help in movement are

A
Actin and myosin

B
Tropomyosin

C
Troponin

D
All of these

Question 3
1 / -0

Select the correct statement regarding the specific disorder of muscular or skeletal system.

A
Osteoporosis - decrease in bone mass and higher chances of fractures with advancing age

B
Myasthenia gravis- auto immune disorder which inhibits sliding of myosin filaments

C
Gout - inflammation of joints due to extra deposition of calcium

D
Muscular dystrophy - age related shortening of muslces

Question 4
1 / -0

Which one of the following is correctly matched?

List I
A Cytosine, uracil, thiamine
B Malleus, incus, cochlea
C Ilium, ischium, pubis
D Actin, myosin, rhodopsin

List II
1 Pyrimidines
2 Ear ossicles
3 Coxal bones of the pelvic girdle
4 Muscle proteins

A
A

B
B

C
C

D
D

Question 5
1 / -0

The term tetanus refers to

A
The partial sustained contraction of major supporting muscles

B
A stronger contraction resulting from multiple motor unit summation

C
The result of wave summation, which produces a smooth and sustained contraction of a muscle

D
The state of muscle fatigue caused by depletion of ATP and accumulation of lactic acid

Question 6
1 / -0

Label the correct part of the Myosin monomer.

A
(i) Actin binding site (ii) Head (iii) ATP binding site (iv) Cross arm

B
(i) Cross arm (ii) Actin binding site (iii) Head (iv) ATP binding site

C
(i) ATP binding site (ii) Actin binding site (iii) Head (iv) Cross arm

D
(i) Head (ii) Cross arm (iii) Actin binding site (iv) ATP binding site

Question 7
1 / -0

The globular head of myosin contains

A
Calcium ions in large quantities.

B
Troponin.

C
ATPase enzyme.

D
ATP.

Question 8
1 / -0

During forced expiration, actively contracting muscles include the

A
diaphragm

B
internal intercostals

C
abdominal muscles

D
all of these

Question 9
1 / -0

Osteoporosis, an age-related disease of skeletal system, may occur due to the.

A
Immune disorder affecting neuromuscular junction leading to fatigue

B
High concentration of $$Ca^{++}$$ and $$Na^+$$

C
Decreased level of oestrogen

D
Accumulation of uric acid leading to inflammation of joints

Question 10
1 / -0

Gliding joint is present between the

A
Carpals

B
Humerus and pectoral girdle

C
Carpal and metacarpal of thumb

D
Knee

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