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.
The blue-green pigment identifies
___________, the ____________
photosynthetic bacteria that
dominate the well-lit, oxygen-rich
mat surface.
The purple pigment marks
____________________ bacteria,
_____________ photosynthetic
bacteria that lives where there
is light but no _____________ gas.
In the black subsurface
layer, _________
respiration and
________ support
microbial populations
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