Q7 of 42 Page 1

Explain the role of histones in forming a nucleosome.

Histone proteins are found in the nucleus of eukaryotic cell. They are basic in nature (positively charged protein) and help in packaging of DNA. The nucleosome is formed when eight separate Histone protein subunits attach to the molecule of DNA. This unit of eight molecules is known as a Histone octomer. The negatively charged DNA is wrapped around this Histone octomer.




More from this chapter

All 42 →
1

Why are cucurbit plants said to be monoecious?

 6

Where exactly is the filiform apparatus present in the embryo-sac of an angiosperm? State its function.

 15

How do desert lizards cope with the variations in their environment? Explain.

 17

(a) Write the scientific name of the source plant and the part from which opioids are extracted. What is it commonly and chemically called?

(b) Where in the human body are its specific receptors located? How do opioids affect the human body?