The human Y chromosome is about 50 million base pairs long. One would expect to find 250,000 nucleosomes associated with this chromosome.
A nucleosome typically contains 200 base pairs. On dividing 50 million by 200, one would get 250,000 which would tell about the number of nucleosomes associated with the human Y chromosome.
A nucleosome is a segment of DNA that is wrapped around a core of proteins. A nucleosomes constitutes the repeating unit of a structure in nucleus known as chromatin (thread-like stained bodies present in nucleus).
The nucleosomes in chromatin appear as 'beads-on-string' when viewed under an electron microscope.
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Answer by YourHope:
Hi! :)
This flowering plant does not wilt but stands straight up, reaching toward the sunlight, because its cells contain mostly:
WATER!
Have a BEAUTIFUL day~
Has it own shape
Has volume
Has mass
Answer:
The correct answer is - True.
Explanation:
Degradative pathways are the pathways that provide energy for the anabolic reactions, these are catabolic reaction. An activator protein is a protein that enhance the transcription by binding to DNA.
A transcriptional activator are bind to the enhancers or promoter proximal elements. These are the the DNA binding proteins that regulates the transcription of the DNA molecule.
Thus, the correct answer is - true.
The correct answer is option D, that is, Jon is correct because the respiratory system removes waste from the body by ridding it of carbon dioxide when we exhale, and the digestive system removes waste from the body in the large intestine where the waste is sent and removed through the rectum.
The respiratory system functions to provide adequate oxygen for the proper functioning of the body and at the same time works to remove the waste products like carbon dioxide via the process of exhalation.
On the other hand, the function of the digestive system is digestion and absorption. It digests the food components into smaller pieces, and helps in the absorption of nutrients from the food, the leftover undigested food, or waste is excreted out through the rectum. Hence, both respiratory and digestive system exhibits one common function of excretion of waste materials.
