The sum of all biosynthetic reactions in a cell is known as
A) metabolism.
B) anabolism.
C) catabolism.
D) synthatabolism.
Answer: B
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If two genes are linked on the same chromosome, then
a. they tend to segregate away from one another during meiosis b. the closer they are to each other the more crossing over occurs between them c. the closer they are to each other the less crossing over occurs between them d. they tend to segregate away from one another during mitosis e. they control the same trait
The base analog 5-bromouracil can tautomerize. One tautomer behaves like thymine and the other behaves like cytosine. If 5-bromouracil is used as a mutagen, what is the minimum number of times replication must occur to mutate the codon for proline (CCC) into the codon for alanine (GCC)?
A) one generation B) two generations C) three generations D) 5-bromouracil cannot induce this mutation
Evolution that involves changes in allele frequencies over just a few successive generations is referred to as:
a. natural selection. b. microevolution. c. macroevolution. d. stabilizing selection. e. directional selection
In the presence of both lactose and glucose, which of the following occurs with the E. coli lac operon?
A. The lacI gene does not produce repressor. B. The lacZ and lacY genes are fully expressed. C. The cAMP-CAP complex is not available to bind near or at the lac promoter. D. Lactose is converted to glucose and galactose. E. Lactose binds to the operator.