1. Describe Each Type of Horizontal Gene Transfer. Include a Picture to Describe Your Answer

BIOS 1700

Dr. Tanda

25 October 2016

Week 10, Session 2

1. Describe each type of horizontal gene transfer. Include a picture to describe your answer.

DNA transfer by conjugation:

DNA transfer by transformation:

DNA transfer by transduction:

2. T/F An archaea cell contains a nucleus and other membrane-bound organelles.

3. T/F A bacterial cell contains a nucleus and other membrane-bound organelles.

4. T/F A eukaryotic cell contains a nucleus and other membrane- bound organelles.

5. T/F Archaea DNA occurs in circular form.

6. T/F Bacterial DNA occurs in circular form.

7. T/F Eukaryotic DNA occurs in circular form.

8. T/F Archaea are sensitive to the antibiotics chloramphenicol, kanamycin, and streptomycin.

9. T/F Bacteria are sensitive to the antibiotics chloramphenicol, kanamycin, and streptomycin.

10.

A student was studying cell growth using cells grown in laboratory cultures. The cultures were synchronized so that all of the cells passed through the same stage of the cell cycle at the same time. The cells were examined during five different periods of time, intervals (A–E). The amount of DNA present per cell was determined for each interval. The graph shows the result of this study.

11. Most of the cells examined during interval A have half as much DNA as those measured in interval C. Therefore, most of the cells at interval B must have been in:

a. G0 Phase

b. M phase

c. S phase

d. G1

e. G2

12. Most of the cells examined during interval D were in:

a. S phase

b. G1 Phase

c. G2 Phase

d. cytokinesis

e. mitosis

13. Most of the cells examined during interval B were in:

a. S phase

b. G1

c. G2

d. cytokinesis

e. mitosis

14. Based on the information in the graph, which interval(s) correspond(s) to times at which most of the cells were at G1 of the cell cycle?

a. intervals A and E

b. intervals A and B

c. intervals B and D

d. intervals A, B, C, and D

15. In people with advanced stages of cancer, they have already accumulated many mutations including oncogenes. But, stimulation of p53 function might be still effective to slow down growth of cancer. Explain why.

16: Which phases are shown in figures below?
Figure / Phase in cell division / Figure / Phase in cell division