Which of the following statements concerning transcription in bacteria is FALSE?
A) It occurs in the nucleoid region.
B) Sigma factors are parts of RNA polymerase that recognize promoter regions.
C) Different RNA polymerases are required for synthesis of mRNA, rRNA, and tRNA.
D) Termination is either self-induced or due to the presence of Rho protein.
E) There are a variety of sigma factors that affect transcription.
C
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Presently, the replacement fertility rate in developed countries is ____
a. 2.0 b. 2.1 c. 2.4 d. 2.6 e. 2.8
In Meselson and Stahl's experiment, what kind of DNA molecules would be found after four replication cycles?
A) Only heavy DNA (15N-15N) B) Only intermediate DNA (15N-14N) C) Only light DNA (14N-14N) D) Both heavy (15N-15N) and light DNA (14N-14N) E) Both heavy (15N-15N) and intermediate DNA (15N-14N)
When a person gets dehydrated while exercising on a hot day, their pituitary gland releases ADH, a hormone that signals the kidneys to retain more water. This is an example of
A) Positive feedback regulation B) Negative feedback regulation C) Chemical cycling D) Emergent properties
The process by which related species become more different in order to reduce competition is called ________.
What will be an ideal response?