Use the following diagram of a hypothetical food web to answer the following questions. The arrows represent the transfer of food energy between the various trophic levels.

Which letter represents an organism that could be a producer?

TLS Online TPP Program

#Question id: 1538

#Unit 4. Cell Communication and Cell Signaling

Many aspects of the biology of stem cells, including maintenance of pluripotency, self-renewal, and differentiation, are controlled by the phenomenon of RNA interference involving a variety of small molecules of RNA.

Match the following miRNA (Column I) with their target gene (Column II).

Column I	Column II
a. Let-7 miRNA	i. Bcl-2
b. miR-16	ii. PTEN phosphatase
c. miR-125a and miR-125b	iii. Myc
d. miR-21	iv. LIN28

TLS Online TPP Program

#Question id: 1539

#Unit 4. Cell Communication and Cell Signaling

Regulatory T cell (TREG) have identified by the presence of

TLS Online TPP Program

#Question id: 1540

#Unit 4. Cell Communication and Cell Signaling

Peptidoglycans  recognize by

TLS Online TPP Program

#Question id: 1541

#Unit 4. Cell Communication and Cell Signaling

Nonphagocytic cell of immune system,

TLS Online TPP Program

#Question id: 1542

#Unit 4. Cell Communication and Cell Signaling

function of  calprotectin?

TLS Online TPP Program

#Question id: 1543

#Unit 4. Cell Communication and Cell Signaling

Effector  cytokines of TH 1 cells?