Compare and contrast the structure, physical characteristics, and biological functions of two of the
following: fats, steroids, and phospholipids.What will be an ideal response?
ANS:In
general, all three molecules consist of a carbon skeleton. Fats and steroids are nonpolar whereas
phospholipids are amphipathic. Fats generally function as storage forms of energy and consist of three
fatty acids attached to glycerol. Steroids consist of four attached rings and have many functions,
including hormones and components of membranes. Phospholipids consist of two fatty acids and one
phosphate group attached to glycerol; they are the principal components of membranes.
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The width of a DNA double helix ____
a. is constant b. is narrower where adenine is present than where cytosine is present c. is wider where purines are present than where pyrimidines are present d. varies randomly e. is wider where pyrimidines are present than where purines are present
Which sequence of the cell cycle is correct?
a. prophase, metaphase, interphase, telophase, anaphase b. prometaphase, anaphase, prophase, telophase, interphase, metaphase c. anaphase, interphase, telophase, prometaphase, prophase, metaphase d. interphase, prophase, prometaphase, metaphase, anaphase, telophase e. interphase, metaphase, prometaphase, prophase, telophase, anaphase
________ is the triskelion molecule that forms the coats on vesicles associated with receptor-mediated endocytosis
Fill in the blank with correct word.
The most abundant class of antibody in the body, what antibody can function by neutralization, agglutination, opsonization, complement activation, and enhancement of natural killer cell activity?
A) IgM B) IgE C) IgG D) IgD E) IgA