Binding of a single ligand to a receptor usually can be viewed as a:

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#Question id: 1189

#Unit 4. Cell Communication and Cell Signaling

Which of the following signaling pathway cannot be activated by cytokines?

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#Question id: 4906

#Unit 8. Inheritance Biology

Shell coiling is a maternal effect phenotype controlled by S gene where S is dominant dextral phenotype over s sinistral phenotype. Dextral coiling Ss male snail was cross with sinistral coiling ss female snail, The phenotype of progeny is 

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#Question id: 12147

#Unit 10. Ecological Principles

Climax forests

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#Question id: 4297

#Unit 3. Fundamental Processes

Match the following decay mechanism

A. Matured translation	1. Ribosome displaces all of the exon–junction complexes.
B. nonsense-mediated mRNA decay	2. Upf complex
C. nonstop-mediated decay	3. eRF1 and eRF3
D. no-go decay

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#Question id: 5085

#Unit 5. Developmental Biology

An embryo with meroblastic cleavage, extraembryonic membranes, and a primitive streak must be that of ________.