Gaseous Exchange MCQch10,11,12k

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

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