Through what process is O2 transported into the blood from air in the lungs?
a. active transport
b. osmosis
c. facilitated diffusion
d. simple diffusion
Ans: d. simple diffusion
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The limitation on microbial growth rate at high nutrient levels is/are
A. the saturation of the transport proteins for nutrient uptake. B. the rate of protein synthesis. C. the rate of DNA replication. D. All of the choices are correct.
A plant researcher wants to construct a synthetic cellulose fiber from 20 glucose molecules. How many molecules of CO2 and glyceraldehyde-3-phosphate are needed to construct the fiber?
A. 20, 40 B. 120, 60 C. 120, 40 D. 20, 60 E. 120, 120 Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about the Calvin cycle, carbon dioxide, and glyceraldehyde-3-phosphate? What other information is related to the question? Choose Answer Do you have all the information needed to determine the likely outcome? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which of these types of chemical bonds would you not expect to find in biological molecules?
a. covalent bonds b. van der Waals forces c. ionic bonds d. hydrogen bonds e. all of these types of bonds are found in biological molecules
Asbestos is a material that was once used extensively in construction. One risk from working in a building that contains asbestos is the development of asbestosis caused by the inhalation of asbestos fibers. Cells will phagocytize asbestos, but are not able to degrade it. As a result, asbestos fibers accumulate in _____.
A) mitochondria B) ribosomes C) peroxisomes D) lysosomes