The main components of a biological membrane are lipids, proteins and sugar.
Most of the biological membranes have two layers of lipids forming two sheets where proteins are in between the lipids trespassing both layers of only one, either to one side of the membrane or to the other. There are also sugars attached either to the lipids (called glycolipids) or to the proteins.
Answer:
Muscles must relax with the process called progressive muscle relaxation.
Progressive muscle relaxation is a non-pharmacological method of deep muscle relaxation, based on the premise that muscle tension is the body's psychological response to anxiety-provoking thoughts and that muscle relaxation blocks anxiety.
<u>Answer:</u>
The process of reproducing offspring from female eggs without any male involvement.
<u>Advantages</u>
1- Rapid production of numerous offspring and there is need of male gametes.
2- Require less amount of time and energy
3- Offspring are the exact copies of the parents and are called clones as they are similar morphologically and genetically.
<u>Disadvantages</u>
1- There is no genetic variability.
2- No new genetic combinations which can be a threat for their survival during population selection.
Answer: The part of DNA that the teacher was modelling would be the backbone of DNA.
Explanation:
The DNA is made of double helical structure which is twisted. In the structure of DNA two strands are coiled among each other.
The DNA consists of the nitrogenous bases, phosphate groups and deoxy-ribose sugar.
The backbone of DNA is made up of sugar( alternating )and phosphate group.The nitrogenous bases such as adenine, cytosine ,guanine and thymine are joined to the deoxy-ribose sugar.
This backbone part was part that the teacher was making as a model by using two coiled springs.
