Macromolecules including sugars, glycogen, and starches composed of sugar monomers linked and cross-linked together are known as ____
a. carbohydrates
b. lipids
c. proteins
d. fatty acids
e. nucleic acids
a
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Common lipids for energy storage are:
A. steroids. B. phospholipids. C. cholesterols. D. waxes. E. triglycerides.
Rods and cones both have four segments and each segment has a specialized function
Indicate whether the statement is true or false.
Steroid hormones do not require a membrane receptor because they:
a. are small enough to pass directly through pores in the membrane b. are lipid-soluble and pass through the bilayer c. pass through special channels d. are water-soluble e. dissolve in the cholesterol of the membranes
Which of the following is a protein maintained at steady levels throughout the cell cycle that requires cyclin to become catalytically active?
A) PDGF B) MPF C) cyclin D) Cdk