Lipids, Fats, and Biochemistry

Insulin is a protein hormone (polypeptide) secreted by the beta cells of pancreatic islets of Langerhans. Steroids include hormones like cortisol and testosterone, while lipids and carbohydrates are nutrient classes, not hormone types.

Amylase is a digestive enzyme that specifically breaks down starch into simpler sugars like maltose. It acts on carbohydrates, not lipids or oils. Glucose is a simple sugar that doesn't require enzymatic breakdown.

Saturated fats are popular with manufacturers of processed foods because they are less vulnerable to rancidity and are in general, more solid at room temperature than unsaturated fats.

Palmitoleic acid is a common constituent of the glycerides of human adipose tissue. It is present in all tissues but, in general, found in higher concentrations in the liver. It has been shown to increase insulin sensitivity by suppressing inflammation, as well as inhibit the destruction of insulin-secreting pancreatic beta cells.

This pigment is yellow to orange in colour. It is present in the stratum corneum and fat cells of dermis and superficial fascia.

Prenol lipids are synthesised from the five-carbon-unit precursors isopentenyl diphosphate and dimethylallyl diphosphate. 

Eicosapentaenoic acid is an omega-3 fatty acid. It is obtained in the human diet by eating oily fish or fish oil, e.g. cod liver, herring, mackerel, salmon, menhaden and sardine and various types of edible seaweed. It is also found in the human breast milk.

Rumenic acid is a conjugated linoleic acid found in the fat of ruminants and in dairy products. It is an omega-7 trans fat.

Polyketides are synthesised by polymerisation of acetyl and propionyl subunits by classic enzymes as well as iterative and multimodular enzymes that share mechanistic features with the fatty acid synthases. Many commonly used anti-microbial, anti-parasitic and anti-cancer agents are polyketides.

LDL particles are sometimes referred to as bad lipoproteins because they correlate with atherosclerosis progression.

Heptanoic acid is used to esterify steroids in the preparation of drugs such as testosterone enanthate, trenbolone enanthate, drostanolone enanthate and methenolone enanthate (Primobolan). It is also one of many additives in cigarettes.

Stearidonic acid is a ω-3 fatty acid, sometimes called moroctic acid. It is biosynthesised from alpha-linolenic acid by the enzyme delta-6-desaturase. Natural sources of this fatty acid are the seed oils of hemp, blackcurrant, corn gromwell and echium, and the cyanobacterium Spirulina.

The pancreatic lipase acts at the ester bond, hydrolysing the bond and releasing fatty acid.

Schizochytrium is a genus of unicellular protists found in coastal marine habitats. They are assigned to the stramenopiles, a group which also contains kelp and various of micro-algae. Certain species produce large amounts of docosahexaenoic acid and are grown commercially for production of this oil for biofeeds, biomass and biofuels.

This is the correct answer. Camels store fat in their hump which gets converted into water under emergency.