What would be the most direct result of an individual having an inability to produce surfactant in their alveoli?
A. The alveoli would be much more likely to harbor infections.
B. Oxygen exchange with the blood would be impaired due to a thickening of the epithelium.
C. The alveoli would fill with fluid due to an ion transport defect.
D. Carbon dioxide exchange with the blood would be impaired due to an inhibition of carbonic anhydrase.
E. The alveoli would physically collapse.
Answer: E
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Matching. Choose the one most appropriate response
for each. 1. ___ microtubules 2. ___ chloroplasts 3. ___ Golgi bodies 4. ___ DNA molecules 5. ___ RNA molecules 6. ___ central vacuoles 7. ___ lysosomes 8. ___ mitochondria 9. ___ nucleoli 10. ___ ribosomes A. contain enzymes for intracellular digestion B. are primary cellular organelles where proteins are assembled C. package cellular secretions for export D. extract energy stored in carbohydrates; synthesize ATP; produce water and carbon dioxide E. synthesize subunits that will be assembled into two-part ribosomes in the cytoplasm F. transcribe, translate hereditary instructions into specific proteins G. store substances H. encode hereditary information I. help distribute chromosomes to the new cells during cell division J. convert light energy to chemical energy stored in the chemical bonds of glucose or starch
In order to get around the lack of ability of prokaryotes to remove introns from precursor RNA, it may be necessary to
A. use the DNA directly. B. use the DNA after it has been processed. C. use different promoters. D. turn mRNA into cDNA. E. use the DNA directly AND use the DNA after it has been processed.
The process of relaying a growth-stimulatory or growth-inhibitory signal in response to an extracellular factor binding at the cell surface is called intercellular signaling
Indicate whether the statement is true or false
If a cell has a large quantity of rough ER, what does this suggest about the activity of that cell?
a. The cell stores fats. b. The cell is dying. c. The cell serves a protective function. d. The cell produces a lot of protein.