Which of the following is made primarily of protein? 

A. skin
B. tendon
C. enzyme
D. carbohydrates


C. enzyme

Biology & Microbiology

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Which type of signal receptor does NOT generally involve transduction of a signal with the transfer of a phosphate group? (Select all correct choices.)

A. G protein-coupled receptor B. receptor kinase C. ligand-gated ion channel D. nuclear receptor

Biology & Microbiology

Prolactin, oxytocin, and estrogen exhibit which type of hormone interaction?

a. synergistic b. permissive c. opposing d. unrelating e. mutual

Biology & Microbiology

A protein normally synthesized in fat cells; it is thought to act as a negative feedback signal normally released by fat stores to decrease appetite and increase fat metabolism

What will be an ideal response?

Biology & Microbiology

Which of the following are important in breaking down organic material in fertile topsoil?

A) rock particles B) humus and cations C) bacteria and fungi D) plant roots

Biology & Microbiology