The weakness of hydrogen bonds between the bases of dna allows what

The  weakness of hydrogen bonds between the bases of DNA allows for the easy separation of the two DNA strands during replication of DNA.

In replication, an initiator protein unwinds a short length of the DNA double helix. Next, an enzyme known as helicase attaches itself to the unwound helix and begins to break the hydrogen bonds between the base pairs  of the two DNA strands thereby pulling them apart to form a Y shape called a replication fork.

The  relative weakness of hydrogen bonds between the base pairs make it  fairly simple for helicase enzyme to beak them apart and thus the process is done very rapidly. 

true is the

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.