Question

Q.1.Answer the following:

(a) Name the substance present in cell wall of plants.

(b) Name the chemicals present in Chromosome

(c) Who discovered : (i)Nucleus (ii) Golgi apparatus

(d) What is Nucleoid? (e) What is Gene? (f) What is Osmosis?

plzzz answer these question... need help ... plzz request to all​

Answer 1

Answer:

1. The main component in plant cell walls is a compound known as cellulose. The cellulose is a structural compound, mainly carbohydrate, that is largely responsible for the structure of the plant cells.
2. The major chemical components of the chromosome are DNA, RNA (nucleic acids), and proteins (histones and nonhistones).
3. It was discovered in 1898 by Italian physician Camillo Golgi during an investigation of the nervous system. After first observing it under his microscope, he termed the structure as apparato reticolare interno ("internal reticular apparatus").
4. The nucleoid (meaning nucleus-like) is an irregularly shaped region within the cell of a prokaryote that contains all or most of the genetic material, called genophore. In contrast to the nucleus of a eukaryotic cell, it is not surrounded by a nuclear membrane.
5. A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. ... In humans, genes vary in size from a few hundred DNA bases to more than 2 million bases.

6. a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one.

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