In scleroderma, patients develop a buildup of collagen in their organs.  Scleroderma is a disease of what tissue type?

A. Muscle tissue
B. Epithelial tissue
C. Connective tissue
D. Nervous tissue


Answer: C

Biology & Microbiology

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Which of the following is NOT the description

of a human disease caused by roundworms?

a. lymph vessels permanently destroyed causing elephant-like legs b. causal agent lives in rectum; females lay eggs in skin around the anus c. infection results from eating uncooked pork d. intestinal blockage disease affecting more than a billion people e. all of these are human diseases caused by roundworms

Biology & Microbiology

Molecules that absorb light are called

A. enzymes. B. pigments. C. photosynthesizers. D. electron carriers. E. absorbers.

Biology & Microbiology

How does DNA move during gel electrophoresis?

A) The DNA moves toward the negative electrode. B) Larger pieces of DNA move at a faster rate. C) DNA moves at a constant rate, regardless of fragment size. D) Smaller pieces of DNA move faster toward the positive electrode.

Biology & Microbiology

Proteins bind selectively to small-molecule targets called ligands. The selection of one ligand out of a mixture of possible ligands depends on the number of weak, noncovalent interactions in the protein's ligand-binding site

Where is the binding site typically located in the protein structure? (a) on the surface of the protein (b) inside a cavity on the protein surface (c) buried in the interior of the protein (d) forms on the surface of the protein in the presence of ligand

Biology & Microbiology