Gaseous Exchange MCQch10,11,12b

Student’s Name:____________Admission No.______Roll No._____Section:______
Paper: Biology      Class: 10                      Time Allowed:    One Hour                           Marks: 25 

Checked by:_______________ Rechecked by:_____________ Sign Invigilator:_____________

Q1. Circle the correct answer.  (12)

1.Normal human breathing rate is?
a) 12 – 15 times per minute b) 15 – 20 times per minute c) 16 – 20 times per minute d) 18 – 20 times per minute
2.Some xerophytes plants store water in _____________ cells?
a) Sclerenchyma b) Parenchyma c) Root d) None of them
3.Dust particle in inspired air is?
a) Variable b) Saturated c) Both a & b d) None of them
4.The smallest bone of human body is…………….
a) stapes b) incus c) malleus d) vertebra
5.The primary chemical stemulus for breathing in the concentration of _______________ in blood?
a) carbon dioxide b) oxygen c) nitrogen d) hydrogen
6.Which mineral is required for the production of Thyroxin?
a) Cl b) F c) Br d) I
7.Which fibers conduct impulse away from cell body?
a) dendrites b) neuron c) nerve d) axons
8.Cones are sensitive to__________
a) White light b) Bright light c) Dim light d) None of them
9.Secretion of rubber plant is called?
a) gums b) mucilage c) latex d) resins
10.To carry urine from the kidney to the bladder is a function of?
a) ureter b) urethra c) a & b d) none od these
11.Pea shaped gland attached to hypothalamus is:
a) Adrenal gland b) Parathyroid c) Pituitary d) Thyroid
12.Where does the gaseous exchange occur in humans?
a) Pharynx b) Trachea c) Bronchi d) Alveoli

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