When a membrane is freeze-fractured, the bilayer splits down the middle between the two layers of phospholipids. In an electron micrograph of a freeze-fractured membrane, the bumps seen on the fractured surface of the membrane are _____
A) peripheral proteins
B) phospholipids
C) carbohydrates
D) integral proteins
E) cholesterol molecules
Answer: D
Biology & Microbiology
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A. synthetic B. generating C. redox D. fueling
Biology & Microbiology
Referring to Figure 7.4 if necessary, determine which step in glycolysis is considered the first committed step
A. step 1 B. step 3 C. step 5 D. step 7 E. step 9
Biology & Microbiology
Food preference in garter snakes is a learned behavior
a. True b. False
Biology & Microbiology
During photosynthesis, carbon dioxide diffuses from the atmosphere into the leaves through pores called
A. plasmodesmata. B. stomata. C. companion cells. D. sieve tubes. E. guard cells.
Biology & Microbiology