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

Which of the following phrases (i),(ii), and (iii) given below each sentenceshould replace the phrase printed in boldletters to make the sentence grammaticallycorrect? Choose the best option among thefive given alternatives that reflect the correctuse of phrase in the context of thegrammatically correct sentence. If thesentence is correct as it is, mark (E) i.e., "Nocorrection required" as the answer. My father told me that all the labor andeffort one puts in to the professional frontis meant to make life easier and thereforeany professional success coming at the cost ofpersonal happiness is pointless.
i. one puts at the professional front is meantto make life
ii. one puts onto the professional front ismeant to make life
iii. one who puts into the professional front ismeant to make life

A

A. Only i

B

B. Only ii

C

C. Only iii

D

D. ii and iii

Direction : Two statements I and II are given. These statement may be either independent causes or may be effects of independent causes or a common cause. One of these statements may be the effect of the other statements. Read both the statements and decide which of the following answer choice correctly depicts the relationship between these two statements. Mark answer :

I. The committee appointed by the Government on the fee structure of the professional courses has drastically reduced the fees of various courses in comparison to those charged in the last year.
II. The parents of aspiring students seeking admission to professional courses had launched a severe agitation protesting against the high fees charged by the professional institutes and the admission process was delayed considerably.

A

Statement I is the cause and statement II is its effect.

B

Statement II is the cause and statement I is its effect.

C

Both the statements I and II are independent causes.

D

Both the statements I and II are effects of independent causes.

E

Both the statements I and II are effects of some common cause.

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

An in vitro translation system can synthesize peptides in all three reading frames of the RNA template. When 5' - UCUCUCUC-(UC)_n-UCUCUCUC - 3' was used as the template in this in vitro translation system, the synthesized peptides contained 50% each of serine and leucine. When 5' - CCUCCUCCU-(CCU)_n-CCUCCU - 3' was used as the template, the synthesized peptides contained 33.3% each of serine, leucine, and proline. Deduce the codon for proline.

A

UCU

B

CUC

C

CCU

D

UCC

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

Humoral immunity is the component of the adaptive immune response that is caused by B cells, antibodies, and type 1 helper T cells (Th1).

A

True

B

False

When compared to the first immune response to the same antigen, which of the following is not a hallmark of the secondary immune response?

A

Antibody is generated fast

B

Many antibodies is produced

C

Antibody is generated without T-cell help

D

Antibody produced has a greater affinity for the antigen

The retroviral transfected DNA is infected into mammalian cells by helper retrovirus. Helper retrovirus should not be packaged and the method adopted for this is?

A

Deletion of the packaging signal in the helper genome

B

Deletion of multiple parts of the helper genome

C

Division of the helper genome into several pieces

D

All of the mentioned

Directions : In each of the following questions a statement is given, followed by three conclusions. Give answer :

Statement : "A rare opportunity to be a professional while you are at home." - An advertisement for computer literate housewives by a computer company.

Assumptions :
I. Some housewives simultaneously desire to become professional.
II. Computer industry is growing at a fast pace.
III. It is possible to be a professional as well as a housewife.

A

Only I and II are implicit

B

Only II and III are implicit

C

Only I and III are implicit

D

Only II is implicit

E

None of these

Dendritic cells are also known as professional APCs as they have greater responsibility than B cells.

A

True

B

False