Which of the following is CORRECTLY matched with its description?
A. Cell identity molecules - are primarily steroids
B. Carrier proteins - move bound ions or molecules from one side of the membrane to the other
C. Channel proteins - catalyze chemical reactions inside the cell
D. Peripheral proteins - penetrate the lipid bilayer from one surface to the other
E. Receptor proteins - move specific ions or molecules using ATP
Answer: B
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A substance that can stimulate a primary immune response but is unable to produce the symptoms of a disease is a(n) ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following are masculinizing hormones produced from the adrenal gland?
a. growth hormone b. androgens c. thyroid hormone d. cortisol e. insulin
Receptor-mediated endocytosis removes _______ from plasma, supplying cholesterol for the body.
A. triglycerides B. LDL C. HDL D. VLDL
Which of the following correctly matches a nuclear structure with its function?
A. nuclear pores - allow molecules to move between the nucleus and cytoplasm. B. chromatin - fluid portion of the nucleus C. chromosomes - contains RNA and histones D. nuclear envelope - contains the nucleolar organizer E. nucleolus - DNA synthesis