Gaseous Exchange MCQch10,11,12a

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.Dust particle in inspired air is?
a) Variable       b) Saturated      c) Both a & b       d) None of them
2.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
3.Secretion of rubber plant is called?
a) gums      b) mucilage      c) latex       d) resins
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.Cones are sensitive to__________
a) White light      b) Bright light      c) Dim light       d) None of them
7.Some xerophytes plants store water in _____________ cells?
a) Sclerenchyma      b) Parenchyma      c) Root      d) None of them
8.Which mineral is required for the production of Thyroxin?
a) Cl      b) F      c) Br        d) I
9.Which fibers conduct impulse away from cell body?
a) dendrites     b) neuron      c) nerve      d) axons
10.Where does the gaseous exchange occur in humans?
a) Pharynx      b) Trachea      c) Bronchi      d) Alveoli
11.To carry urine from the kidney to the bladder is a function of?
a) ureter      b) urethra      c) a & b       d) none of these
12.Pea shaped gland attached to hypothalamus is:
a) Adrenal gland      b) Parathyroid      c) Pituitary      d) Thyroid

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