Lederberg and Tatum's experiments demonstrated that
A. bacteria can acquire genetic material from each other.
B. bacteria do not release DNA into the environment for other bacteria to take up.
C. bacteria must be in physical contact in order for bacteria to exchange genetic material.
D. the genetic transfer occurred when the bio+, met+ phe-thr- strain transferred DNA to the bio-met- strain.
E. All of these observations were made by Lederberg and Tatum.
A. bacteria can acquire genetic material from each other.
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A. 10% B. 20% C. 30% D. 50% E. 60%
When a gene is transcribed, what is produced?
a. more DNA b. protein or polypeptide sequences c. messenger RNA d. enzymes e. genetic defects
You briefly expose bacteria undergoing DNA replication to radioactively labeled nucleotides. When you centrifuge the DNA isolated from the bacteria, the DNA separates into two classes
One class of labeled DNA includes very large molecules (thousands or even millions of nucleotides long), and the other includes short stretches of DNA (several hundred to a few thousand nucleotides in length). These two classes of DNA probably represent _____. A) leading strands and Okazaki fragments B) lagging strands and Okazaki fragments C) Okazaki fragments and RNA primers D) leading strands and RNA primers
Salmonelloses are:
What will be an ideal response?