Gaseous Exchange MCQch10,11,12o

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

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