1. It is a membrane protein It is a bridging molecule that binds PS
TTR-52 clusters around apoptotic cells, because
It is a membrane protein
It is a bridging molecule that binds PS
It is made in apoptotic cells
It is a receptor for PS
None of above

2. Which of the following is important for TTR-52 activity
The signal sequence
The transthyretin-like domain
Its ability to bind PS
Its ability to bind CED-1
All of the above

3. TTR-52 was found to act in the ced-1 pathway, because
It can bind CED-1
Inactivation of ttr-52 does not enhance the engulfment defect of the ced-1 mutant
It is a bridging protein that binds PS
It co-localizes with CED-1 to apoptotic cells
None of the above

4. In Figure 7, ttr-52(lf) can block the missing cell phenotype caused by loss of tat-1, because
ttr-52 is required to recognize living cells with surface-exposed PS
ttr-52 is required to externalize PS in the missing cells
ttr-52 is required to recognize a new “eat-me” signal on the living cells
ttr-52 can kill these cells directly
None of the above

5. Based on the paper, the following is observed
CED-1 binds to apoptotic cells before TTR-52 does
TTR-52 binds to apoptotic cells before CED-1 does
CED-1 binds to surface-exposed PS before TTR-52 does
TTR-52 binds to surface-exposed PS before PSR-1 does
None of the above