Gaseous Exchange MCQch10,11,12r

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

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