Gaseous Exchange MCQch10,11,12j

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.Secretion of rubber plant is called?
a) gums     b) mucilage     c) latex     d) resins
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.Which mineral is required for the production of Thyroxin?
a) Cl     b) F     c) Br     d) I
5.Dust particle in inspired air is?
a) Variable     b) Saturated     c) Both a & b     d) None of them
6.The primary chemical stemulus for breathing in the concentration of __ in blood?
a) carbon dioxide     b) oxygen     c) nitrogen    d) hydrogen
7.Where does the gaseous exchange occur in humans?
a) Pharynx     b) Trachea     c) Bronchi     d) Alveoli
8.Cones are sensitive to__________
a) White light     b) Bright light     c) Dim light     d) None of them
9.Pea shaped gland attached to hypothalamus is:
a) Adrenal gland     b) Parathyroid     c) Pituitary    d) Thyroid
10.The smallest bone of human body is________
a) stapes     b) incus     c) malleus     d) vertebra
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.Which fibers conduct impulse away from cell body?
a) dendrites    b) neuron     c) nerve     d) axons

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