The Enzyme Dicer Chops Dsrna Molecules Into Small Pieces Of

Question: 1. In some organisms, the primary function of a gene in a cell is to participate in regulating the body as a whole rather than responding to the cell’s immediate environment. These organisms would be A. multicellular. B. diploid. C. bacterial. D. prokaryotic.

Answer: A. multicellular

Question: 2. The maintenance of a constant environment in a cell is called __________. A. active transport B. homeostasis C. gene expression D. translation

Answer: B. homeostasis

Question: 3. Through control of gene expression, a bacterial cell responds to changing __________ conditions. A. internal B. protein C. environmental D. genetic

Answer: C. environmental

Question: 4. In multicellular organisms, the mechanism most directly responsible for directing development and maintaining homeostasis is gene A. expression. B. duplication. C. deletion. D. regulation.

Answer: D. regulation

Question: 5. Eukaryotic cell mRNA transcripts can remain in the cell for hours because they are A. stable. B. long. C. isolated. D. analogous.

Answer: A. stable

Question: 6. As a microbiologist you have been asked to investigate gene regulation in a new bacteria. Given what is known about bacteria, the logical place to begin your investigation is A. transcriptional control. B. translational control. C. promoter control. D. repressor control. E. operator control.

Answer: A. transcriptional control

Question: 7. Transcriptional control-proteins increase the rate of transcription by binding to A. mRNA sequences within the DNA. B. tRNA sequences within the DNA. C. operator sequences within the DNA. D. promoter sequences within the DNA. E. enhancer sequences within the DNA.

Answer: E. enhancer sequences within the DNA.

Question:

Answer: B. major groove of the DNA double helix

Question: 9. Vertebrate cells possess a protein that binds to clusters of 5-methylcytosine and ensures the gene will stay in the “off” position. This control of gene regulation is a result of A. translation. B. enhancer expression. C. methylation. D. promoter expression. E. operator suppression.

Answer: C. methylation

Question:

Answer: B. downstream of the gene promoter