#Question id: 8852
#Unit 9. Diversity of Life Forms
The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the corresponding bones in whales have very different shapes and proportions. However, genetic data suggest that all three kinds of organisms diverged from a common ancestor at about the same time. Which of the following is the most likely explanation for these data?
#Question id: 5319
#Unit 11. Evolution and Behavior
When gene duplication occurs to its ultimate extent by doubling all genes in a genome, which of the following results has occurred?
#Question id: 19386
#Unit 12. Applied Biology
#Question id: 5292
#Unit 8. Inheritance Biology
A transformation experiment is performed with a donor strain that is resistant to four drugs: W, X, Y, and Z. The recipient is sensitive to all four drugs. The treated recipient population is divided up and plated on media containing various combinations of the drugs. The table below shows the results:
|
Drug(s) added |
Number of Colonies |
|
None |
20,000 |
|
WX |
76 |
|
WY |
1324 |
|
WZ |
1976 |
|
XY |
85 |
|
XZ |
69 |
|
YZ |
1564 |
|
WXY |
50 |
|
WXZ |
62 |
|
WYZ |
1354 |
|
XYZ |
48 |
|
WXYZ |
53 |
Following observation are given
A) X gene is obviously quite distant from the other three genes
B) Y gene is obviously quite distant from the other three genes
C) The Order is three closely link gene W Z Y
D) The Order is three closely link gene W X Z
Which of the following combination is correct?
#Question id: 1519
#Unit 4. Cell Communication and Cell Signaling
Following statements are regarding to the FOXO3a protein.
A. In the presence of growth factors, FOXO3a is non phosphorylated and mainly localizes to the nucleus, where it activates transcription of several genes encoding pro-apoptotic proteins.
B. When growth factors are removed from the cells, PKB becomes active and phosphorylates FOXO3a.
C. Phosphorylated FOXO3a binds to cytosolic phosphoserine-binding protein 14-3-3 to bind FOXO3a and thus sequester it in the cytosol.
D. Dephosphorylated FOXO3a binds to cytosolic phosphoserine-binding protein 14-3-3 to bind FOXO3a and thus sequester it in the cytosol.
Which of the following is correct?