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Biology Class 11 Chapter 13 - Immunity - 10
1.
B lymphocytes were discovered first in?
gizzard
liver
bursa of fabricus
stomach
2.
How many copies of receptor proteins that bind to antigens are
present on the surface of B cells?
10,00
100
10,000
10,0000
3.
Melanoma is a deadliest?
skin cancer
blood cancer
prostate cancer
breast cancer
4.
The treatment of genetic disorders by the insertion of normal
genes into the cells of a patient is known as?
gene hybridization
dialysis
gene therapy
gene cloning
5.
Protiens formed by B cells in respond to the antigens are known as?
immunoglobulins
none of these
antibodies
both of these
6.
The B cells secreting antibodies are known as?
plasma cells
cytoplasmic cells
germ cells
cytotoxic cells
7.
The retaining of immunity in the body is the function of?
memory cells
germ cells
tumour cells
neurons
8.
The life span of memory cells is?
few months
few weeks
many years
few days
9.
The life span of plasma cells and cytotoxic T cells is?
few years
many years
few days
few months
10.
A typical antibody molecule is?
J shaped
V shaped
Y shaped
T shaped
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