Hershey and Chase used _____ to radioactively label the T2 phage's proteins.
Fill in the blank(s) with the appropriate word(s).
Ans: Sulfur 35
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Scientists discovered that the primary reason leaves either develop as simple or compound is related to
A. whether the KNOX gene is active or not active. B. where the leaf primordium is positioned. C. whether auxins are moving in the stem tip. D. how fast the KNOX gene arrives at the primordium. E. the protein PHANTASTICA and its interaction with auxins.
The major structural components of a cell membrane are ____
a. phospholipids and cellulose b. phospholipids, protein, and sterols c. protein and sterols d. glycolipids and proteins e. phospholipids and glycolipids
What is a reason why most exotic species’ introductions fail?
a. small numbers of organisms involved b. significant oversight by local specialists c. high number of endemic predatory species d. declining amount of sustainable habitat
You would like to identify as many bacterial species as possible in the human mouth. Why is biochemical testing not the most efficient and accurate method of completing this task?
A. Since you do not know the growth characteristics and metabolic properties of the bacteria in the mouth, you cannot determine all varieties of media to use for isolation and culture. B. Bacteriological media is very expensive, particularly when you would have to use a variety of types to identify the different bacteria. C. Biochemical testing, using a variety of media, is inaccurate. It has been replaced by more advanced testing procedures. D. Bacteria in the mouth are difficult to grow because of the adverse conditions in the oral habitat.