An open reading frame (ORF) is defined as a DNA sequence that

a. begins with a start codon.               

b. ends with a stop codon.

c. contains 50 codons.   

d. contains approximately an equal frequency of A, T, G, and C.

TLS Online TPP Program

#Question id: 14994

#Unit 4. Cell Communication and Cell Signaling

The absence of MHC class I, which is expressed by almost all normal cells, but is specifically down-regulated by some tumors and in response to some viral infections, it will undergo apoptosis by

TLS Online TPP Program

#Question id: 14995

#Unit 4. Cell Communication and Cell Signaling

NKT Cells, which share features with both conventional T lymphocytes and NK cells,

Statement-I) Like T-cells, NKT Cells have T-cell receptors (TCRs), and some express CD4.

Statement-II) Like NK cells, NKT Cells have antibody receptors  

Statements-III) they are APCs

Given above statements, which is sharing correct features of NKT cells?

TLS Online TPP Program

#Question id: 15144

#Unit 4. Cell Communication and Cell Signaling

For the stimulation of B-cell responses

TLS Online TPP Program

#Question id: 15145

#Unit 4. Cell Communication and Cell Signaling

Which of the following drug causes autoimmune hemolytic anemia?

TLS Online TPP Program

#Question id: 15189

#Unit 4. Cell Communication and Cell Signaling

Which of the following  cells control the differentiation of HSCs (hematopoietic stem cells )?

TLS Online TPP Program

#Question id: 15328

#Unit 4. Cell Communication and Cell Signaling

Given some properties of B-cells, except?

a) They are APCs

b) Have surface marker CD19

c) Antibodies at surface of b cell – IgM, IgE

d) They can express only MHC1

e) Part of Innate immunity