Gene order can be inferred from gene expression patterns because
A) an upstream gene can affect downstream gene expression.
B) mRNAs for proteins in a pathway are produced at the same time, but then are translated only when the proteins are needed.
C) proteins in a pathway are produced at the same time but the proteins that are not needed are degraded.
D) mRNAs for proteins in a pathway are produced at the same time and those that are not needed are destabilized by miRNAs.
E) gene expression does not depend on upstream genes.
A) an upstream gene can affect downstream gene expression.
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The reaction diagrammed to the right (more than once answer may apply):
A. is the final reaction of glycolysis. B. is one possible pathway in the fermentation of pyruvate. C. shows synthesis of the substrate that enters the citric acid cycle. D. occurs in the cytosol. E. occurs in the mitochondrial matrix. F. occurs twice for each glucose oxidized.
Which type of chromosomal change occurs when a chromosome breaks and the broken part attaches to a different chromosome?
a. Inversion b. Duplication c. Translocation d. Deletion e. None of these choices.
An example of a mutualistic relationship is that of bacteria
A. decomposing organic material. B. causing diseases. C. producing nitrogen-containing molecules in the roots of plants. D. being used in the chemical industry.
The human genome comprises:
A) a homologous pair of chromosomes. B) 23 chromosomes. C) 46 pairs of chromosomes. D) 2 X chromosomes. E) 23 pairs of chromosomes.