Biology MCQs

1496 MCQs  — Everyday Science MCQs  (Page 128 of 150)

Attempt Biology Quiz
Diameter of thick filament is____________?
A. 7 nm.
B. 8 nm
C. 16nm
D. 10-100 ?m.
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Which of the following is a uni-nucleated cell?
A. A smooth muscle cell.
B. A cardiac muscle cell.
C. A skeletal muscle cell.
D. All of these
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The contraction of which of the following muscle fibers, is controlled by hormones?
A. A smooth muscle
B. A cardiac muscle
C. A skeletal muscle.
D. All of these
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Why skeletal muscles are called striated muscles?
A. They appear darker than smooth muscles by naked eye.
B. Alternating dark and light bands appear on their surface when visualized by naked eye.
C. Alternating dark and light bands appear on their surface when visualized via a microscope.
D. All of these
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A fracture hematoma has____________?
A. Healing properties.
B. Destructive properties.
C. Neutralizing properties.
D. Dead cells
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Which of the following cells are involved in soft callus formation?
A. Fibroblast and osteoblast.
B. Osteoblast and osteoclast.
C. Osteoclast and osteocyte
D. Onteocyte and osteoblast
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Bony callus formation completes in___________?
A. 2-3 weeks
B. 3-4 weeks.
C. 2-3 months.
D. 3-4 months.
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Which of the following statement about osteoporosis is incorrect.
A. It results from estrogen deficiency.
B. Bone eating process takes over bone formation process.
C. There is reduction of bone mass and change in chemical composition of the matrix
D. It is common in old age.
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Which of the following statements about fractures in old age is incorrect?
A. They are more common than in adult age.
B. Occur as a result of bone being thin and weak.
C. Due to good blood supply it results in quick healing.
D. It involves osteoblasts and osteocytes.
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If two ends of fractured bone are opened and kept united via screws and wires drilled in bone substance. This step in fracture repair is called___________?
A. Open reduction.
B. Closed fixation.
C. Open fixation.
D. Immobilization
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Word of the Day
13 Jul
Debunk
expose the falseness or hollowness of (an idea or belief).
بے نقاب کرنا، پول کھولنا

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