Which of the following would be the most thermodynamically unfavorable membrane lipid activity in a membrane?
A) lateral diffusion
B) transverse diffusion
C) association with a neighboring lipid
D) association with cholesterol
E) rotation
Answer: B
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A lizard is sitting on a rock on a cool, cloudy morning. As the day progresses the sun comes out and the temperatures of the rock and the lizard increase. What changes would be expected in the lizard's metabolic rate and activity level?
A. Both the metabolic rate and activity level would increase. B. Both the metabolic rate and activity level would decrease. C. The metabolic rate would increase and the activity level would decrease. D. The metabolic rate would decrease and the activity level would increase. E. The metabolic rate and activity level would not change.
What hormone, secreted by the stomach, increases the secretion of acids by cells of the stomach lining?
a. amylase b. gastrin c. pepsin d. pepsinogen e. insulin
Which of the following features were required for the the evolution of the amphibians?
A. notochord, vertebrae, jaws, bony skeleton, lungs and 4 limbs B. notochord, vertebrae, jaws, bony skeleton, lungs and amniotic eggs C. notochord, mammary glands, jaws, bony skeleton, lungs and 4 limbs D. notochord, vertebrae, jaws, cartilaginous skeleton, lungs and 4 limbs
Which of the following substances is made of lipids?
A) DNA B) cellulose C) steroids D) enzymes