When properly aligned, the enzyme and substrate form an enzyme-substrate (ES)______.

Fill in the blank(s) with the appropriate word(s).


Answer: Complex

Biology & Microbiology

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Which white blood cell type are concentrated in the lining of respiratory passages, are important phagocytes that

protect the lungs, and present antigens to T cells?

a. B lymphocytes b. macrophages c. neutrophils d. dendritic cells

e. mast cells

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The gross reproductive rate represents the number of births per 1000 population per unit of time

Indicate whether the statement is true or false

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The structure of the enzyme active site accounts NOT only for its catalytic activity but also for its ______.

a) ability to bind only one or a small number of closely related biological molecules b) insolvency c) both specificity and the ability to bind only one or a small number of closely related biological molecules d) specificity

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Which of the following statements about hormones is not true?

A. Hormones are secreted by axons. B. Hormones are targeted to specific organs within the body. C. Hormones are carried by the bloodstream. D. It takes time to deliver hormones to the cells. E. The effects of hormones are long lasting.

Biology & Microbiology