Gaseous Exchange MCQch10,11,12d

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

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