Gaseous Exchange MCQch10,11,12f

Student’s Name:____________Admission No.______Roll No._____Section:______
Paper: Biology      Class: 10                      Time Allowed:    20 mins                          Marks: 12 

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

Q1. Circle the correct answer.  (12)

1.Which mineral is required for the production of Thyroxin?
a) Cl    b) F     c) Br     d) I
2.Some xerophytes plants store water in _____________ cells?
a) Sclerenchyma     b) Parenchyma      c) Root      d) None of them
3.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
4.The primary chemical stemulus for breathing in the concentration of ________ in blood?
a) carbon dioxide    b) oxygen     c) nitrogen     d) hydrogen
5.To carry urine from the kidney to the bladder is a function of?
a) ureter      b) urethra      c) a & b      d) none of these
6.Pea shaped gland attached to hypothalamus is:
a) Adrenal gland      b) Parathyroid      c) Pituitary      d) Thyroid
7.The smallest bone of human body is_______
a) stapes      b) incus      c) malleus      d) vertebra
8.Secretion of rubber plant is called?
a) gums      b) mucilage     c) latex     d) resins
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.Dust particle in inspired air is?
a) Variable      b) Saturated     c) Both a & b     d) None of them
12.Cones are sensitive to__________
a) White light      b) Bright light      c) Dim light      d) None of them

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