Gaseous Exchange MCQch10,11,12t

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

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