The letter “A” in the above figure is
a. the epidermis.
b. the sweat gland.
c. the dermis.
d. the hypodermis.
e. none of the above.
Answer: a
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Membrane proteins serve many functions. One of the functions is transportation of substances across the membrane. If a cell biologist placed cells into an environment in which a chemical has been added that blocks the function of only carrier proteins, the process that will be affected is
A. active transport. B. osmosis. C. simple diffusion. D. phagocytosis. E. pinocytosis.
Enzymes are ____ catalysts
a. protein b. lipid c. nucleic acid d. inorganic e. ionic
Answer the following statements true (T) or false (F)
1. In eukaryotic cells the electron transport system occurs in the mitochondria. 2. In prokaryotic cells the electron transport system occurs in the mitochondria. 3. Chemiosmotic phosphorylation occurs when protons pass through ATP synthase and combine with oxygen and electrons to make water. 4. Substrate-level phosphorylation occurs when protons pass through ATP synthase and combine with oxygen and electrons to make water. 5. Anaerobic respiration uses oxygen as its final electron acceptor at the end of the electron transport chain.
Which of the following approaches is likely most successful to prevent soil erosion?
(a) Farming using contour tillage (b) Fungal phytoremediation (c) Drip irrigation (d) Condensing the soil with heavy machinery