Seminiferous tubules is where the perm is created
All living things need energy; it is a requirement for life. In a typical cell, ATP, the high energy molecule, is produced in the MITOCHONDRIA <span>in the presence of a sugar (glucose) and OXYGEN.
Answers are in the cap. letters!
Hope this helps!</span>
Answer:
The correct answer will be-
1. Nucleosomes
2. Chromatin
3. Sister chroamtid
4. Centromere
Explanation:
The DNA is a very long molecule which if has to be passed on to the daughter cell as it is will cause problems. So, to reduce problems a cell form tightly packed structure of DNA so that they can be passed easily to the daughter cell.
The packaging of DNA begins with the wrapping of the DNA around histone proteins which forms the 11 nm basic structural units called nucleosomes. The nucleosomes start condensing each other and form 30 nm structure chromatin fibres.
The chromatin fibres undergo replication during S phase which produces an exact copy of the chromatin called sister chromatids bound to each other at a central point called centromere which helps the separation of the chromatids during M phase.
Since diabetics are not able to make enough insulin, scientists use gene engineering to make it for them. they insert the gene that codes for the production of insulin in the plasmid (circular DNA of bacteria ) to create recombinent DNA, and the bacteria will asexually reproduce, making more and more of the insulin in a short amount of time! hope this helped it took me a long time to understand the whole process in this unit!
