Which are the special proteins in muscles that contract and relax to cause movement?

 

Niacin is the name for vitamin(B3).

Liver can produce small amount of niacin from tryptophan.

To produce 1 mg of niacin we require 60 mg of tryptophan.

A sudden loss of memory is a symptom of Amnesia which is caused by an injury or damage to our brain. In that situation we cannot remember about ourself and our life.

Androgens such as testosterone are produced by the Interstitial cells.

The ATP is synthesized from ADP and an inorganic phosphate and involves special channel proteins that are embedded in a membrane. ATP is formed in the electron transport chain of photosynthesis and cellular respiration.

Photosynthesis only occurs in autotrophic organisms while respiration occurs in all types of organisms.

All proteins, carbohydrates and fats are macronutrients that we need to make living. They contribute to 90% of the dry weight of our diet. 

From the given options, Excess carbohydrates and fats are stored; excess proteins are not.

Water is the important nutrient all organisms need. Humans has almost 60% of their body weight is water. Some organisms have 90% of their body weight is of water.

Dysfunctional behaviors are maladaptive which means that they interfere with everyday life.