The reinforcing substance called lignin provides support to a variety of plant structures, but is located primarily in plant:

a. roots
b. stems
c. leaves
d. vascular tissue
e. seeds


d

Biology & Microbiology

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The _____ forms of the electron carriers NAD+/NADH and FADH/FADH2 have high potential energy

A. oxidized B. reduced C. phosphorylated D. carboxylated E. None of the answer options is correct.

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The ____ gland stores and releases hormones produced by the hypothalamus

a. pancreas b. pineal c. pituitary d. thyroid e. parathyroid

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Which of the following organelles does not belong to the endomembrane system?

A. Golgi apparatus B. Endoplasmic reticulum C. Mitochondrion D. Lysosome

Biology & Microbiology

Which of the following is NOT a typical characteristic of most bacterial plasma membranes?

A) site of energy production B) composed of a phospholipid bilayer C) contains proteins D) contains cholesterol E) is selectively permeable

Biology & Microbiology