The Cell Membrane. All living cells and many of the tiny organelles internal to cells are bounded by thin membranes. These membranes are composed primarily of phospholipids and proteins and are typically described as phospholipid bi-layer
The primary function of estrogens in women is development of female sexual characteristics during puberty. (Breasts, regulation of the menstrual cycle etc.)
In males estrogen helps in maturation of the sperm and maintenance of a healthy libido.
<span>When encountering an unconscious choking victim it is important to perform abdominal thrusts. The answer is letter B. By performing an abdominal thrust, you are applying pressure on the abdomen to force the object out from the system of the choked victim. Victim may be unconscious while choking because the victim lacks oxygen to breathe in from air. To perform abdominal thrust, there are four tips.
1. Stand behind the person by wrapping your arms around his/her waist and make him/her tip forward slightly.
2. Create a fist with one hand and then place it a little bit above his/her navel.
3. Grasp the fist with the other hand by pressing it hard into the abdomen with a sudden ascending thrust.
4. Perform the thrusts five times until the object will be removed form the system of a person.</span>
Answer:
cytoplasm, nucleus, cell membrane
A structure of protein and looped DNA in a repeated pattern is known as nucleosomes.
<h3>What are nucleosomes? </h3>
Nucleosomes are a structure of DNA looped around histone proteins. This connection is histone and proteins makes sure of the compact nature of DNA in all eukaryotic cells.
Histone proteins are basic positively charged proteins. These histone proteins prevent DNA damage and also aid in DNA replication.
Eight positively charged histone protein molecules at the centre of the looped DNA are called histone octamers. Two copies of the four core histone proteins i.e H2A, H2B, H3 and H4 are present in a histone octamer. Negatively charged DNA readily surrounds the positively charged histone proteins to form the nucleosome.
Therefore, the structure of proteins and looped DNA in a repeated pattern is known as nucleosomes.
Read more about nucleosomes, here
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