Question

Define precipitation reactions antibody?

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Answer 1

Answer:

It is a type of antigen-antibody reaction, in which the antigen occurs in a soluble form. When a soluble antigen reacts with its specific antibody, at an optimum temperature and PH in the presence of electrolyte antigen-antibody complex forms insoluble precipitate. This reaction is called a precipitation reaction. A lattice is formed between the antigens and antibodies; in certain cases, it is visible as an insoluble precipitate. Antibodies that aggregate soluble antigens are called precipitins.

Answer 2

Explanation:

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Question

Construct a quadrilateral ABCD in which AB = 3.5 cm, BC = 5 cm, CD = 4.6 cm,

∠

B

=

125

c

i

r

c

a

n

d

∠

C

=

60

∘

.

Solution

Steps of Construction :

(i) Draw a line segment BC = 5 cm.

(ii) At B, draw a ray BX making an angle of

125

∘

and cut off BA = 3.5 cm.

(iii) At C, draw a ray CY making an angle of

60

∘

and cut off CD = 4.6 cm.

(iv) Join AD

ABCD is the required quadrilatera