Proteoglycans in the extracellular matrix of animal tissues ________________
(a) chiefly provide tensile strength.
(b) allow cartilage to resist compression.
(c) are linked to microtubules through the plasma membrane.
(d) are polysaccharides composed of glucose subunits.
(b)
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The region responsible for complex learning,
intellect, and personality is located in the lobe indicated by a. A. b. B. c. C. d. D. e. E.
Which statement concerning the root epidermis is true?
a. It does not secrete a waxy cuticle over the root hairs. b. It consists of protective tissue several layers thick. c. There are large intercellular spaces among the cells. d. It comprises the bulk of the eudicot root. e. It is the site of storage of surplus sugars produced in the leaves.
Which form of hepatitis kills more people in the United States than AIDS?
a) Hepatitis A b) Hepatitis B c) Hepatitis C d) Hepatitis E
The three-dimensional coordinates of atoms within a folded protein are determined experimentally. After researchers obtain a protein's structural details, they can use different techniques to highlight particular aspects of the structure
What visual model best displays a protein's secondary structures (? helices and ? sheets)? (a) ribbon (b) space-filling (c) backbone (d) wire