3 marker questions
1. What is nucleus? Describe it
2. What is a gene? What are it's functions?
3. Difference between eukaryotic ans prokaryotic
4. difference between plant and animal cell(5 differences)
5. What are the postulates of cell theory?
40 points
no useless answers pls
Answers
MY EXPERIENCED ANSWER I AM GIVING BELOW. IT WILL MAKE YOU SCORE HIGHER AND HIGHER.
1) Nucleus is a small spherical mass located somewhat in the centre of cytoplasm. It possess a definite nuclear membrane and a relatively dense fluid is present known as neucleoplasm. CHROMATIN FIBRES are certain thread like structures which gets condensed later to form chromosomes.
2) Gene is the physical hereditary unit made of a complex chemical substance DNA. Its functions is to carry hereditary information and to determine the characteristics of a species.
3) See picture. Rotate it according to your need.
4) See picture. Rotate it according to your need.
5) The cell is the smallest unit of structure of all living things, the cell is the unit of function in all living things, all cells arise from pre existing cells
1. The nucleus is the very dense region consisting of nucleons (protons and neutrons) at the center of an atom. Almost all of the mass in an atom is made up from the protons and neutrons in the nucleus, with a very small contribution from the orbiting electrons.
2.DNA is made up of genes. A set of genes are responsible for the production of a specific protein.
Each protein is specific for its specific function. Therefore, it is the DNA that decides the formation
of the structural, enzymatic, hormonal, and other components in an organism. Genes are responsible for the physical appearance and body functions of an organism.
3. Eukaryotic cells are those cells which have a well built nucleus, i.e, they have nucleus membrane.
Prokaryotic cells are those cells which do not have a well built nucleus, i.e, they lack nucleus membrane.
4.ANIMAL CELL
1. They are generally small in size.
2. Cell wall is absent.
3.Vacuoles are small in size.
4. No other animal cell possesses plastids except for the protozoan Euglena.
PLANT CELL
1. They are usually larger than animal cells.
2. Cell wall is present.
3. Vacuoles are larger in size.
4. Plastids are present.