Describe the basic molecular structures and primary functions of the four major categories of biological macromolecules:
a. carbohydrates
b. lipids
c. proteins (amino acids)
d. nucleic acids

Carbohydrates

Explanation:

Carbohydrates get broken down into glucose by the acid in your stomach and small intestine, and the glucose gives energy to your cells especially brain cells and neurons. Lipids like triglycerides store energy for cells. Proteins build up many parts of your body. Carbohydrates like monosaccharides have a formula of C6,H12,O6 and are kind of hexagon shaped. Different lipids have different structures, triglycerides is like three lines because they are made of 3 fatty acids and glycerol. Different proteins have different structures, alanine is lined with oxygen atoms and hydrogen. DNA is two lined with proteins on it and RNA is one lined with proteins.

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.