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Biology 1525 MCQs [All-Courses]

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Biology covers key concepts of life, organisms, and human systems with exam-focused notes for PPSC, FPSC, KPPSC, BPSC.,NTS, OTS, AJKPSC. Clear, concise topics help students prepare effectively for competitive tests.

All Topics  1525

An increrase in plant girth due to activity of _____________ is called secondary growth?
A Cork cambium
B Pith.
C Vascular cambium.
D Both a and c
Correct Answer: Both a and c
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.
Correct Answer: There is reduction of bone mass and change in chemical composition of the matrix
Among the followings which is the most longest supportive cell?
A Tracheids
B Sclereids
C Trachea
D Collenchyma cells
Correct Answer: Tracheids
Which of the follwing is a childhood disease resulting from nutritive Ca2+ deficiency?
A Hypocalcaemia Tatanic spasms.
B Osteomalacis.
C Rickets.
D Tetany
Correct Answer: Rickets.
Secondary cell wall of sclerenchyma cells is impregnated with_________________?
A Cellulose.
B Peptidoglycan and murein.
C Lignin.
D Pectin.
Correct Answer: Lignin.
Which of the following hormone is predominantly responsible for bone weakening in older women?
A Progesterone.
B Oestrogen.
C Parathyroid hormone.
D Calcitonin.
Correct Answer: Oestrogen.
In which of the following joint muscles are arranged in the same plane as that of joint?
A Between radius and ulna.
B Between ulna and scapula
C Between humerus and scapula
D Between femur and tibia.
Correct Answer: Between femur and tibia.
Higher turgor pressure in a plant cell is maintained by________________?
A Large number of vacoules in a plant cell.
B Higher ionic concentration inside vacuoles resulting from active pumping of ions at their tonoplastic membrane
C Higher osmotic pressure of the cell vacuole
D both b and c
Correct Answer: both b and c
Fibrous capsule surrounding synovial joints may be thickened at some places to form:
A Synovial membrane.
B Ligaments.
C Muscles.
D Tendon
Correct Answer: Ligaments.
Joint between two parietal bones, which is infact immovable one is an example of_________?
A Fibrous joints.
B Cartilaginous joints.
C Synovial joints.
D None of these
Correct Answer: Fibrous joints.

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