Explanation
China`s Chang`e-6 brought lunar samples from the far side of the Moon in 2024.
Correct Answered :
Wrong Answered :
A
Luna 25
B
Chang`e-6
C
Artemis I
D
Vikram Lander
China`s Chang`e-6 brought lunar samples from the far side of the Moon in 2024.
Correct Answered :
Wrong Answered :
Assertion (A): An antibody is represented as H2L2.
Reason (R): An antibody has two heavy chains and two light chains.
Choose the correct options:
A
Both (A) and (R) are true and (R) is the correct explanation of (A).
B
Both (A) and (R) are true but (R) is not the correct explanation of (A).
C
(A) is true but (R) is false
D
(A) is false but (R) is true
Antibody structure consists of 2 heavy and 2 light chains (H2L2).
Correct Answered :
Wrong Answered :
A
C3
B
C3b
C
C5a
D
C5b
C5a acts as a strong chemotactic factor attracting neutrophils.
Correct Answered :
Wrong Answered :
Column -A(Antibody Type) Column -B (Found in)
i. IgA 1. Blood and extracellular fluid
ii. IgG 2. Surface of immature B cells
iii. IgD 3. Basophils and mastocytes
iv. IgE 4. Mucosal secretions like saliva, tears, and breast milk
A
i-4, ii-1, iii-2, iv-3
B
i-3, ii-4, iii-1, iv-2
C
i-1, ii-4, iii-2, iv-3
D
i-2, ii-1, iii-4, iv-3
IgA -> Mucosal secretions, IgG > Blood, IgD > Immature B cells, IgE > Allergy & mast cells.
Correct Answered :
Wrong Answered :
I. Cell division by mitosis
II. Transcription producing mRNA
III. Engulfing and digesting bacteria
A
I and II only
B
III only
C
I and III only
D
I only
B lymphocytes divide and produce antibodies but do not engulf bacteria like phagocytes.
Correct Answered :
Wrong Answered :
A
HHC
B
HLA
C
HAT
D
HPFC
In humans, MHCs are known as HLA (Human Leukocyte Antigens).
Correct Answered :
Wrong Answered :
I. They are included in the Toll family.
II. They include MHC complexes.
III. They recognize molecular patterns.
IV. They include scavenger receptors.
A
I, III, and IV
B
I and II
C
III and IV
D
II and IV
Innate receptors include Toll-like receptors, scavenger receptors, and recognize molecular patterns. MHC is adaptive.
Correct Answered :
Wrong Answered :
A
i-iii-ii
B
iii-ii-i
C
ii-iii-i
D
iii-i-ii
Endogenous antigen pathway: Peptide generated by proteolysis ? Transport to ER ? Binding to MHC I.
Correct Answered :
Wrong Answered :
A
CD24
B
CD4
C
CD8
D
CD16
CD8 co-receptor recognizes MHC class I molecules, interacting with beta2 microglobulin.
Correct Answered :
Wrong Answered :
A
i-4, ii-1, iii-2, iv-3
B
i-1, ii-2, iii-4, iv-3
C
i-3, ii-4, iii-1, iv-2
D
i-2, ii-3, iii-1, iv-4
IL-1 promotes inflammation and fever, IL-2 stimulates T-cell growth, IFN-? regulates immune responses, TNF-? plays a role in inflammation and apoptosis.
Correct Answered :
Wrong Answered :