Question

Urine is yellowish due to presence of
A. Urochrome
B. Anthoxanthin
C. Urine
D. Uric acid

Answer 1

Urine is a by-product produced due to metabolism in humans and in many other animals. It flows from the kidneys through the ureters to the urinary bladder.

Complete answer:
Urine is diluted by water, less water makes it more concentrated. The colour is determined by that when we drink more water or via hydration the urine is of light and pigment. The less water we drink, the darker your urine will become.
Diet can also be a factor for urine. The colour of a natural place can interact with the pigment to create a different colour process to contain high amounts of Hyundai interacts with urine and creates different colours.
Urine is created by the liver due to break down of protein from the food we eat. It contains a small amount of waste called urobilin. This is produced when our red blood cells get recycled.
Urobilin gives the urine a yellow colour.
Urobilin is generated by the breakdown of heme, which is first converted to bilirubin by biliverdin. Bilirubin is first excreted as bile, which is then degraded to urobilinogen by bacteria in the large intestine. Some of it stays in the large intestine and is converted to stercobilin, which gives faeces their brown colour. Some of it is reabsorbed into the bloodstream before reaching the kidneys. Urobilinogen is oxidised to urobilin when exposed to oxygen, giving urine its yellow hue.
Age and sex can also determine the colour of your urine for example if you have a tumor in your kidney urinary tract bleeding is very common.

Note:
Urine is produced by your kidneys, filtering wastes and excess water from your blood. The trash is referred to as urea. It is carried to the kidneys by your blood. Urine goes from the kidneys to the bladder through two narrow tubes called ureters. Urine is stored in the bladder until you are ready to urinate. Urine is excreted from the body through the urethra after urination.