2MARKS: PART-3

BITOT’S SPOT DUE TO:

  • Bitot’s spots are an eye condition named by a Dr. Bitot in France in 1863. Caused by vitamin A deficiency, Bitot’s spots are tiny specks of keratin protein that flakes off the inside of the eyelid. A malfunction of the goblet cells leads of a deficiency of the protective mucus that carries away keratin and other debris and keeps the lenses clear.
  • Bitot’s spots are a condition of a continuum of eye complaints ranging from itchy eyes to blindness. Mild cases of vitamin A deficiency only cause minor irritation. More severe cases of vitamin A deficiency cause Bitot’s spots and xerophthalmia.

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2MARKS: PART 2

ACTIVE METHIONINE:

Methionine (C5H11NO2S) is an essential, sulfur-containing amino acid. It is the source of sulfur for numerous compounds in the body, including the amino acids cysteine and taurine. The body uses sulfur to influence hair follicles and promote healthy hair, skin, and nail growth. Sulfur also increases the liver’s production of lecithin (which reduces cholesterol ), reduces liver fat, protects the kidneys, helps the body to excrete heavy metals, and reduces bladder irritation by regulating the formation of ammonia in the urine.

Methionine is a lipotropic—a nutrient that helps prevent fat accumulation in the liver, and usually helps detoxify metabolic wastes and toxins.

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2MARKS: PART 1

THE FUNCTIONS OF NUCLEUS:

  • It controls the heredity characteristics of an organism.
  • It is responsible for protein synthesis, cell division, growth and differentiation.
  • Stores heredity material in the form of deoxy-ribonucleic acid (DNA) strands.
  • Also stores proteins and ribonucleic acid (RNA) in the nucleolus.
  • It is a site for transcription process in which messenger RNA (m RNA) are produced for protein synthesis.
  • Aids in exchange of DNA and RNA (heredity materials) between the nucleus and the rest of the cell.
  • Nucleolus produces ribosomes and are known as protein factories.
  • It also regulates the integrity of genes and gene expression.

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