List - I | List – II | ||
A. | Malignant tumors | i. | Destroy tumors |
B. | MALT | ii. | . AIDS |
C. | NACO | iii. | Metastasis |
D. | \( \alpha-Interferons\) | iv. | Lymphoid tissue |
The correct matches are:
Malignant tumors are characterized by metastasis (the spread of cancer cells). Thus, A-III.
MALT (Mucosa-associated lymphoid tissue) is a type of lymphoid tissue. Thus, B-IV.
NACO (National AIDS Control Organisation) is related to AIDS. Thus, C-II.
Alpha-interferons are used to destroy tumors (they have anti-cancer properties). Thus, D-I.
Therefore, the correct option is (1): A-III, B-IV, C-II, D-I.
(d) How is active immunity different from passive immunity?
(c) The organ transplants are often rejected if not taken from suitable compatible persons. [(i)] Mention the characteristic of our immune system that is responsible for the graft rejection. [(ii)] Name the type of immune response and the cell involved in it.
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : The potential (V) at any axial point, at 2 m distance(r) from the centre of the dipole of dipole moment vector
\(\vec{P}\) of magnitude, 4 × 10-6 C m, is ± 9 × 103 V.
(Take \(\frac{1}{4\pi\epsilon_0}=9\times10^9\) SI units)
Reason R : \(V=±\frac{2P}{4\pi \epsilon_0r^2}\), where r is the distance of any axial point, situated at 2 m from the centre of the dipole.
In the light of the above statements, choose the correct answer from the options given below :