Question

SMC (structural maintenance of chromosomes) proteins are associated with chromatin in many types of organisms. Two of the major complexes that eukaryotes possess are cohesins and condensins.
Sort the following phrases as describing cohesins, condensins, or both. Note: If you answer any part of this question incorrectly, a single red X will appear indicating that one or more of the phrases are sorted incorrectly.

1) generally dimeric, forming a V-shaped complex
2) hold sister chromatids together after replication, until chromatid separation
3) each terminus contains part of a site for ATP hydrolysis
4) contain two coiled-coil motifs connected by a hinge domain
5) associated with kleisin
6) essential for DNA replication and cell division
7) contributes to the compaction of chromosomes during mitosis and enables proper chromatid separation during anaphase

Answer 1

Answer: Since the sentences are already descriptive enough, here are the proper names according to the abilities condensins and cohesins have or not:

1) generally dimeric, forming a V-shaped complex : condensin

2) hold sister chromatids together after replication, until chromatid separation : cohesin

3) each terminus contains part of a site for ATP hydrolysis : both

4) contain two coiled-coil motifs connected by a hinge domain : both

5) associated with kleisin : condensin

6) essential for DNA replication and cell division : both

7) contributes to the compaction of chromosomes during mitosis and enables proper chromatid separation during anaphase: cohesin