A mutation in the gene encoding the enzyme that cuts F factor DNA during conjugation would result in
A. an inability to separate the recipient DNA from the donor DNA.
B. an inability to draw the conjugated cells close enough to allow DNA transfer.
C. the transfer of single-stranded DNA instead of double-stranded DNA.
D. the inability of the donor DNA to move through the pilus.
E. the inability of the recipient cell to replicate the F factor after transfer.
A. an inability to separate the recipient DNA from the donor DNA.
You might also like to view...
Systemic fungal infections are difficult to treat because active antifungal drugs cause significant host toxicity
Indicate whether the statement is true or false.
Answer the following statements true (T) or false (F)
1. Two species of three-spined stickleback fish live in a single lake in British Columbia. They are closely related but occupy different niches. They exist nowhere else. These species most likely arose by sympatric speciation from a single species of three-spined stickleback. 2. The pace of evolution may change due to sudden environmental shifts such as climate change. This may result in rapid evolution. 3. The Mexican axolotl (Ambystoma mexicanum) is an amphibian that has a derived mode of development characterized by metamorphic failure. This mode of development results in an entirely aquatic life cycle in which the animal never develops a terrestrial phase. This is an example of paedomorphosis. 4. A modern goal of systematics is to create taxa based on similarity of form and function, regardless of evolutionary relationships. 5. An assumption used for molecular clocks is that neutral mutations accumulate at a rapidly increasing rate over time between two species.
Four of the five answers listed below are related by a common biome. Select the exception
a. no trees b. permafrost c. short growing seasons d. found in the rain shadows e. found above the Arctic Circle
What would be revealed in a comparison of mitosis and cytokinesis in animal cells and plant cells?
a. A cleavage furrow is initiated in animal cells, while a cell plate begins to form in plant cells during telophase. b. The nuclear envelope disintegrates in prophase in animal cells, but remains intact in plant cells. c. Sister chromatids are identical in animal cells, but they differ from one another in plants. d. In animal cells, chromosomes do not become attached to the spindle until anaphase, whereas chromosom