Which set of four elements makes up the largest portion of cells by dry weight?
A) carbon, sulfur, potassium, oxygen
B) oxygen, nitrogen, phosphorus, hydrogen
C) carbon, hydrogen, oxygen, nitrogen
D) nitrogen, carbon, sulfur, potassium
Ans: C) carbon, hydrogen, oxygen, nitrogen
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Identify the parts of a typical fungal body plan and briefly explain the function of each of the structures you identified. What will be an ideal response?
Which one of the following statements is contrary to basic scientific thought?
A. There are specific causes for events observed in the natural world, and the causes can be identified. B. There are general rules or patterns that can be used to describe what happens in nature. C. What one person perceives will often be difficult for others to perceive. D. The same fundamental rules of nature apply regardless of where and when they occur.
Where does the Calvin cycle occur?
A. thylakoid lumen B. chloroplast inner membrane C. chloroplast outer membrane D. chloroplast stroma E. thylakoid membrane
What is the most compelling reason why DNA, rather than RNA, evolved to be the storage repository for genetic information in cellular life forms?
A. DNA molecules are more chemically stable than RNA molecules. B. DNA has deoxyribose rather than ribose. C. DNA is double-stranded rather than single-stranded.