3 B. Write short answers of the following questions. 1. List four main functions of a nucleus. 2. What do you know about peroxisomes? 3. Write two differences between rough endoplasmic reticulum and smooth endoplasmic reticulum. 4. What is cytoskeleton? Why it is consider to be important organelle in the cell. 5. Cell is called structural and functional unit of life. Justify the statement. 6. Why are chloroplast found only in plant cells? 7. What are the consequences of cell losing cell membrane?
Answers
1.control of the genetical information of the cell and thus the heredity characteristics of an organism,
control of the protein and enzyme synthesis.
2.Peroxisomes are single membrane-bound organelles that contain enzymes. ...
3.The main difference between these two terminologies is that the Smooth Endoplasmic Reticulum is known for stocking the lipids and proteins.
4.Most eukaryotic cells contain a complex network of protein fibers called the cytoskeleton. It forms a framework for the movement of organelles around the cytoplasm - most of the organelles are attached to the cytoskeleton. .
5.The cell is known as the structural and functional unit of life because all living beings are formed of cells.
6.Chloroplasts are found in plant cells only because chloroplasts contain chlorophyll which is essential for photosynthesis.