Biology M

1. Chilgoza is got from

(a)    Pinus

(b)   Cycus

(c)    Brassica

(d)   None of these

             2. Match the following

List I	List II
(a)    Adrenalin       (b)   Estrogen       (c)    Insulin      (d)   phermones	1.       anger , fear, fanger          2.       attracting partners through sense of smell        3.       females        4.       glucose

Codes

(a)    3  1   4  2

(b)   1  3   2   4

(c)    1  3  4   2

(d)   3  1   2  4

             3.  Which allotropy of carbon is in rigid three- dimensional structure?

(a)    Graphite

(b)   Fullerene

(c)    Diamond

(d)   Carbon black

             4.  In which organ of the human body are the lymphocyte cells, formed?

(a)    Liver

(b)   Long bone

(c)    Pancreas

(d)   Spleen

            5.  What is the role of positive catalyst in chemical reaction?

(a)    It increase the rate of reaction

(b)   In decrease the rate of reaction

(c)    It increases the yield of the products

(d)   It provides better purity of the products

            6. Which one of the following sets of elements as primarily responsible for the origin of life on the Earth?

(a)     hydrogen , oxygen and sodium

(b)   Carbon, hydrogen and nitrogen

(c)    Oxygen , calciumand phosphorus

(d)   Carbon, hydrogen and potassium

           7.  Why hard water does not give lather with soap?

(a)    Hard water contains calcium and magnesium ions, which from precipitate with soap

(b)   Hard water contains sulphate and chloride inos, which from precipitate

(c)    pH of hard water is high

(d)   pH of hard water is less

            8.  In a bisexual flower in androecium and gynoecium mature at different time the phenomenon is known as

(a)    dichogamy

(b)   herpogamy

(c)    haterogamy

(d)   monogamy

            9. Consider the following statements

1.       Sweet orange plant is propagated by grafting technique.

2.       Jasmine plant is propagated by layering technique.

Which of the statement given above is/ are correct?

(a)    Only 1

(b)   Only  2

(c)    Both 1 and 2

(d)   Neither 1 nor 2

              10.  Before X-ray examination (coloured X-ray) of the stomach, patients are given suitable salt of barium because

(a)    Barium salts are white in colour and this helps stomach to appear clearly

(b)   Barium is a good absorber of X-rays and helps stomach to appear clearly

(c)    Barium salts are easily available

(d)   Barium allows X- rays to pass through the stomach

Answer:

1.       A

2.       C

3.       B

4.       D

5.       D

6.       B

7.       D

8.       A

9.       C

10.   B