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IV. SHORT ANSWER

21. Write types of RNA and explain one by one.

22. Write smaller components of a nucleotide.

23. Define the terms ingestion and egestion.

24. Write types of teeth.

25. Explain the difference between mitosis and meiosis.



Answer :

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Final answer:

The answer covers types of RNA, nucleotide components, ingestion, egestion, types of teeth, and the difference between mitosis and meiosis.


Explanation:

Types of RNA:

  1. mRNA (Messenger RNA): Carries genetic information from DNA to the ribosome for protein synthesis.
  2. rRNA (Ribosomal RNA): Forms a major part of ribosomes, where proteins are synthesized.
  3. tRNA (Transfer RNA): Transfers amino acids to the ribosome based on the codon sequence of mRNA in protein synthesis.

Nucleotide components:

  • Nitrogenous base
  • Sugar molecule
  • Phosphate group

Ingestion and Egestion:

Ingestion is the process of taking food or substances into the body while egestion is the removal of undigested food or wastes from the body.

Types of teeth:

  1. Incisors
  2. Canines
  3. Premolars
  4. Molars

Mitosis vs. Meiosis:

In mitosis, a single cell divides to produce two identical daughter cells, each with the same number of chromosomes as the parent cell. In meiosis, a diploid cell divides twice to produce four haploid daughter cells, each genetically different from the parent cell.


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