DNA is condensed by a certain amount just on its own, just by its own interactions within the DNA molecule,..but whne proteins get involved it gets condensed 30000 fold
what happens is that proteins called histones are like hockey pucks, and DNA wraps around it 1.5 times and then goes to another histone and wraps around that so that it looks like beads on a string (i hope that makes sense, its the only way to describe it) 
these histones condense this DNA a lot, and when the histones get methylated then the DNA packs together even closer to get heterochromatin (VERY densely packed DNA)...the theory here is that DNA has a net negative charge due to the phosphate groups in the DNA backbone and doesnt allow the DNA to come together as closely as it could (like charges repel like charges), but when histones are methylated, the negative charge on the DNA is masked by the methyl groups and DNA can come together closer

5 0

2 years ago

Gland that controls the metabolic rate

oksian1 [2.3K]

Thyriod gland is the right answer

3 0

3 years ago

Why was iodine able to diffuse across the membrane while starch was not?

Vikentia [17]

Starch cannot diffuse across the membrane because starch molecules are too large to fit through the pores in the dialysis tubing, whereas iodine is a smaller molecule and therefore can diffuse across.

4 0

2 years ago

Read 2 more answers

Differentiate between first and second order consumers?

Whitepunk [10]

Explanation:

The difference between first and second consumer are,

The first consumer are autotrophic in nature but second consumers are heterotrophic in nature.
The first consumer are mostly plants and second consumers are mostly animals.
The first consumer are called producers and second consumer are called herbivores.

hope it helps..

7 0

3 years ago