Antibodies raised against an antigen from one organism will react to a greater or lesser degree with similar antigens from a related organism, depending on how many surface epitopes they share. This has given rise to a systematic method of identification of microorganisms known as______?

#Question id: 690

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following pairs of bonds within a peptide backbone show free rotation around both bonds?

#Question id: 2019

#Unit 4. Cell Communication and Cell Signaling

Which of the following is not a component of an insectʹs defense against infection?

#Question id: 12582

#Unit 10. Ecological Principles

#Question id: 5236

#Unit 5. Developmental Biology

Following statements regarding to signaling pathways that control the properties of germline stem cells in drosophila.

A. The signaling molecules—the TGF-β-family proteins Dpp and Gbb as well as Hedgehog (Hh)—are maintain the self -renewal property of germline stem cells by the repression of differentiation factor.

B. Both E-cadherin and Arm are important in maintaining the germline stem-cell niche and regulate the proliferation of stem cells.

C. The signaling molecules—the TGF-β-family proteins Dpp and Gbb as well as Hedgehog (Hh)—are maintain germline stem cell
niche as well as self-renewal property.

D. Both E-cadherin and Arm are important in maintaining the self -renewal property of germline stem cells by the repression of differentiation factor.

Which of the following is correct?

#Question id: 116

#Unit 1. Molecules and their Interaction Relevant to Biology

A compound containing N-acetylneuraminic acid (sialic acid) is: