Myosin head cleaves ATP for:

1. Formation of cross bridges

2. Breaking of cross bridges

3. Both 1 and 2

4. Neither 1 nor 2

Subtopic:  Sliding Filament Theory |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Vitamin D deficiency in an adult causes the condition known as _____.

1.rickets

2. osteoporosis

3. osteomalacia

4. giantism

Subtopic:  Muscle Contraction: Other Considerations |
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

The number of correct statements amongst the given statements is:

I. Cardiac muscles are striated and involuntary.
II. Myosin head is an active ATPase enzyme.
III. The neurotransmitter released at the neuromuscular junction is acetylcholine.
IV. White muscle fibers depend on anaerobic process for energy.
V. Functional unit of muscle contraction is the sarcomere.

1.  2       

2.  3

3.  4       

4.  5

Subtopic:  Skeletal Muscle: Sarcomere |
 82%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

In the given diagram of the human skull, the bones represented by the letters A, B, and C are respectively:

                

1. Sphenoid, Ethmoid and Lacrimal

2. Ethmoid, Sphenoid and Lacrimal

3. Sphenoid, Lacrimal and Ethmoid

4. Ethmoid, Lacrimal and Sphenoid

Subtopic:  Axial Skeleton: I | Axial Skeleton |
 76%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Match each item in Column I with one in Column II and choose your answer from the codes given below:
       Type of joint            Example
       A. Hinge            a. First carpo-metacarpal
       B. Pivot              b. Between the carpals
       C. Gliding           c. Atlanto-axial
       D. Saddle           d. Knee joint

            A.    B.    C.     D.
   

1.     d     c      b      a
   

2.     c     d      b      a
   

3.     c     b      d      a
   

4.     d     b      a      c

Subtopic:  Synovial Joint |
 92%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

During skeletal muscle contraction, increase in calcium levels leads to binding of calcium to a subunit of _______ on ______ filaments and thereby removes the masking of active sites for ______.

1. Troponin, Tropomysin, Myosin

2. Calmodulin, Actin, Myosin

3. Troponin, Actin, Myosin

4. Calmodulin, Actin, Myosin

Subtopic:  Skeletal Muscle: Myofilaments |
 68%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Cardiac muscles can be best defined as:

1. Many cardiac muscle cells assemble in a branching pattern.
2. Single cardiac muscle fibre enclosed by connective tissue layer.
3. Group of multinucleated muscle fibres enclosed by connective tissue layer.
4. Group of unstriated muscle fibres enclosed by endocardium.
Subtopic:  Skeletal Muscle: Basic Anatomy |
 72%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following is required for the breaking of cross-bridge during muscle contraction?

1. ATP and Ca++

2.  ADP and Ca++

3.  Only Ca++

4.  ATP only

Subtopic:  Sliding Filament Theory |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Zygomatic and sphenoid bone is an example of

1.  Cranial bones.

2.  Cranial bone and facial bone respectively.

3.  Facial bone and cranial bone respectively.

4.  Facial bone.

Subtopic:  Number of Bone in Axial Skeleton |
 70%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

The calcium binding protein in smooth muscles leading to contraction is:

1.  Calmodulin

2.  Troponin

3.  Tropomyosin

4.  Ubiquitin

Subtopic:  Muscle Contraction: Other Considerations |
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints