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Which MHC molecule recognizes CD8 TC cells?

A

MHC I

B

MHC II

C

MHC III

D

HLA-C

Correct Answer: MHC I

CD8 is a co-receptor of T-cell and is present on the T cytosolic cell. It is a hetrodimer of α and β chains and recognizes MHC I molecule.

Which of the following statement(s) is/are CORRECT for antigen activated effector T cells?
P. CD4+ cells make contact with macrophages and stimulate their microbicidal activity.
Q. CD4+ cells make contact with B cells and stimulate them to differentiate into plasma cells.
R. CD8+ cells make contact with B cells and stimulate them to differentiate into plasma cells.
S. CD8+ cells make contact with virus infected cells and kill them.

A

Q only

B

Q and S only

C

P, Q and S only

D

P, Q, R and S

Lineage commitment is a process in which CD4–CD8– (double negative) thymocytes differentiate to CD4– and/or CD8– T cells.

A

True

B

False

Which is the correct order of activities showcased by exogenous pathway? i) Generation of MHC class II molecules ii) MHC-peptide transport iii) Class II MHC peptide loading iv) Generation of Peptide from proteolysis

A

i—ii—iii—iv

B

iv—i—iii—ii

C

ii—iii—i—iv

D

i—iii—iv—ii

Which of the following statements about immune response are correct?
P. T cells are activated by antigen-presenting cells.
Q. Foreign peptides are not presented to helper T cells by class II MHC proteins.
R. Dendritic cells are referred to as professional antigenpresenting cells.

A

P and R only

B

P and Q only

C

Q and R only

D

P, Q and R

Which of the following statements are correct regarding common differences between plant and animal cells?
1. Plant cells have cellulose cell wall, while animal cells lack it.
2. Plant cells lack plasma membrane, while animal cells have it.
3. Mature plant cell have a large vacuole, while animal cells have numerous small vacuoles.

A

1 and 2

B

2 and 3

C

1 and 3

D

1, 2 and 3

What is the ratio of CD4+ cells to CD8+ cells?

A

1:2

B

2:5

C

2:1

D

1:5

Which molecule is left in the binding groove of MHC II molecule in the endocytic compartments?

A

Heat shock proteins

B

CLIP

C

Tapasin

D

MHC-DO

Which of the following protein recognizes MHC class I proteins?

A

CD4

B

CD8

C

CD26

D

CD10

Which of the following statements about the commonly used automobile battery are true?
1. It is usually a lead-acid battery.
2. It has six cells with a potential of 2V each.
3. Its cells work as galvanic cells while discharging power.
4. It cells work as electrolytic cells while recharging.
Select the correct answer:

A

1, 2, 3 and 4

B

1, 2 and 3

C

2 and 4

D

3 and 4

Consider the following statements and choose the correct answer:
1. All living things are composed of cells and their products
2. All cells arise from pre-existing cells
3. All cells are basically alike in chemical composition and metabolic activities
4. The function of an organism as a whole is the outcome of the activities and interactions of the constituent cells

A

Only 1 and 2 are correct

B

Only 1, 2 and 4 are correct

C

Only 2 and 4 are correct

D

1, 2, 3 and 4 are correct