If you could engineer an activity into dna polymerase to allow both strands to follow the replication fork, what would this additional activity be?

the ability to proofread in the 5' → 3' direction
the ability to synthesize dna without using a template
the ability to synthesize dna in the 3' → 5' direction
the ability to begin dna synthesis without a primer

The table presents the average day and night temperatures in five cities. it also reveals whether a city receives substantial rainfall (wet climate) or little rainfall (dry climate). which city’s rocks are likeliest to experience frost wedging, and why? a) city a because the consistently subzero temperature would prevent water from melting b) city b because it is a wet region and the temperature fluctuates around the freezing point c) city c because it receives plenty of rain fall and the weather is moderately cool d) city d because the hot and dry weather would cause rocks to absorb water