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
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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.
The ____ gland stores and releases hormones produced by the hypothalamus
a. pancreas b. pineal c. pituitary d. thyroid e. parathyroid
Which of the following organelles does not belong to the endomembrane system?
A. Golgi apparatus B. Endoplasmic reticulum C. Mitochondrion D. Lysosome
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