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NEET BIOLOGY Locomotion and MovementMedium

Question

Which one of the following is the correct matching of three items and their grouping category?

A

Malleus, incus, cochlea – Ear ossicles

B

Ilium, ischium, pubis – Coxal bones of pelvic girdle

C

Actin, myosin, rhodopsin – Muscle proteins

D

Cytosine, uracil, thiamine – Pyrimidines

Step-by-Step Solution

According to the sources, the pelvic girdle consists of two coxal bones, and each coxal bone is formed by the fusion of three specific bones: the ilium, ischium, and pubis . The other matches are incorrect because: (1) the three ear ossicles are the malleus, incus, and stapes, while the cochlea is a structure of the inner ear ; (2) actin and myosin are contractile muscle proteins, but rhodopsin is a protein found in the eye ; and (3) the nitrogenous pyrimidines found in nucleic acids are cytosine, uracil, and thymine, whereas thiamine is actually Vitamin B1 .

Exam Context & Concepts Covered

This question aligns with the NEET BIOLOGY syllabus, specifically targeting concepts from Locomotion and Movement. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

BIOLOGY Locomotion and Movementfollowingcorrectmatchinggroupingcategory

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The contractile protein of skeletal muscle involving ATPase activity is:

A.tropomyosin
B.myosin
C.α-actinin
D.troponin
EasySolve

Gout is a type of disorder which leads to:

A.Inflammation of joints due to accumulation of uric acid crystals
B.Weakening of bones due to decreased bone mass
C.Inflammation of joints due to cartilage degeneration
D.Weakening of bones due to low calcium level
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Match List I with List II: List I A. Fibrous joints B. Cartilaginous joints C. Hinge joints D. Ball and socket joints List II I. Adjacent vertebrae, limited movement II. Humerus and Pectoral girdle, rotational movement III. Skull, don't allow any movement IV. Knee, help in locomotion

A.A-III, B-I, C-IV, D-II
B.A-I, B-III, C-II, D-IV
C.A-II, B-IV, C-I, D-III
D.A-IV, B-II, C-III, D-I
EasySolve

Three types of muscles are given as a, b and c. Identify the correct matching pair along with their location in human body:

A.(a) Skeletal - Triceps
B.(a) Skeletal - Biceps
C.(a) Involuntary - Nose tip
D.(a) Smooth - Toes
EasySolve

Given below are two statements: Assertion (A): Osteoporosis is characterised by decreased bone mass and increased chances of fractures. Reason (R): Common cause of osteoporosis is increased levels of estrogen. In the light of the above statements, choose the most appropriate answer from the options given below:

A.(A) is not correct but (R) is correct.
B.Both (A) and (R) are correct and (R) is the correct explanation of (A).
C.Both (A) and (R) are correct but (R) is not the correct explanation of (A).
D.(A) is correct but (R) is not correct.
MediumSolve

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

A.Pepsin and prolactin - Two digestive enzymes secreted in the stomach
B.Troponin and myosin - Complex proteins in striated muscles
C.Secretin and rhodopsin - Polypeptide hormones
D.Calcitonin and thymosin - Thyroid hormones
MediumSolve

Select the correct statement regarding the mechanism of muscle contraction.

A.It is initiated by a signal sent by CNS via sensory neuron.
B.Neurotransmitter generates action potential in the sarcolemma.
C.Increased Ca++ level leads to the binding of calcium with troponin actin filaments.
D.Masking of active site for actin is activated.
MediumSolve

Calcium is important in skeletal muscle contraction because it:

A.binds to troponin to remove the masking of active sites on actin for myosin.
B.activates the myosin ATPase by binding to it.
C.detaches the myosin head from the actin filament.
D.prevents the formation of bonds between the myosin cross bridges and the actin filament.
EasySolve

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