The endocrine system sends signals using chemical messengers called ________

Fill in the blank(s) with correct word


hormones

Biology & Microbiology

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To infect a cell, HIV must

A. bind both CD4 and a cytokine co-receptor. B. bind both CD8 and a cytokine co-receptor. C. bind both CD8 and a class I MHC protein. D. kill cytotoxic T cells and bind CD4.

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The structure in the figure above represents a molecule of ____

a. pre-mRNA b. tRNA c. snRNA d. mRNA e. rRNA

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The endocrine gland that produces melatonin is the

A. pancreas. B. pineal gland. C. parathyroid gland. D. adrenal gland. E. testis.

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The organism used to make bleu cheese is ________.

A. Leuconostoc mesenteroides B. Penicillium roqueforti C. Streptococcus lactis D. Propionibacterium E. Micrococcus

Biology & Microbiology