Question

CH-08 Cell : Structure and Functions
1) Write short notes on the following:
(a) Cytoplasm (b) Nucleus of a cell.
2) Make sketches of animal and plant cells. State five differences between them.
3) State the difference between eukaryotes and prokaryotes.
4) Where are chromosomes found in a cell? State their functions.
5) Differentiate between Cell wall and cell membrane​

Answer 1

Answer

Hope It Helps You

Explanation:

1)Cytoplasm is a jelly-like substance between the nucleus and the cell membrane. Various cell organelles like ribosomes, mitochondria, endoplasmic reticulum, etc. are suspended in the cytoplasm.

2)The nucleus is an organelle found in eukaryotic cells. Inside its fully enclosed nuclear membrane, it contains the majority of the cell's genetic material

3) In animal cell, cell wall is absent while, in plant cell it is present. (ii) Chloroplasts are absent in animal cell and are present in plant cell. (iii) In animal cell, Centrosome presents near the nucleus and in plant cell it has no centrosome. Make a sketch of the human nerve cell.

4)Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA). Passed from parents to offspring, DNA contains the specific instructions that make each type of living creature unique

5)CELL WALL

It is the outermost part of the plant cell  

It is made up of pectin, chitin, lignin, glycoproteins, glycolipids, sugar, and cellulose.

CELL MEMBRANE

It is the outermost covering the animal cells

It is a lipid bilayer. And is composed of lipoproteins and carbohydrates.

Answer 2

Answer:

1. a cytoplasm - it is a living part of cell inside the cell membrane but excludes the nucleus.

b.Nucleus of a cell - a nucleus is a membrane-bound organelles that contain the cell 's chromosomes .Pores ii n the nucleus membrane in and out of the nucleus.

2. Animal cell.

a.have no chloroplast

b.have only small vacuoles

c.often irregular in shape.

Plant cell.

a.have a cell membrane

b.have cytoplasm

c.have a nucleus.

4. chromosomes the highly collide and condensed chromatin fibre.