Table of Contents
Why is it said that a cell without?
The DNA is present inside a chromosome. Chromosomes can carry genetic information from parent cells to the daughter cells. Thus, if a nucleus is absent in a cell, then no genetic information will pass from one generation to the next generation. Thus, the cell will have no future.
Is a cell without a nucleus called?
Prokaryotes are organisms whose cells lack a nucleus and other organelles. Most prokaryotes are small, single-celled organisms that have a relatively simple structure. Prokaryotic cells are surrounded by a plasma membrane, but they have no internal membrane-bound organelles within their cytoplasm.
Why type of cell does not have a nucleus?
Prokaryotes do not have a nucleus. Instead, their genetic material is located in the main part of the cell….Prokaryotic Cells.
Prokaryotic Cells | Eukaryotic Cells | |
---|---|---|
Nucleus | No | Yes |
DNA | Single circular piece of DNA | Multiple chromosomes |
Membrane-Bound Organelles | No | Yes |
Why lysosomes are called as suicidal bags?
Lysosomes are known as suicide bags of cell because it contains digestive enzymes. If something burst, the lysosomes release digestive enzymes with digests all the cells. This leads to the death of cells. Hence, Lysosomes are referred to as “suicide bags of cell”.
Why blood is the river of life?
Blood is liquid and red just like a red river and for humans without blood there is no life because it transports nutrients and oxygen to all body cells. Hence blood is called red river of life.
Why do cells need a nucleus?
The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) and carries the genes, structures that contain the hereditary information. Nucleoli are small bodies often seen within the nucleus.
Why are Lysosomes called scavengers?
Complete answer: Lysosomes also are known as scavengers of the cells because they are capable of removing the cell debris having dead and non-functioning cell organelle by digesting them. They are in the shape of spheres.
Which of the following is not a cell organelle?
(D) Golgi complex. The correct answer is (B) Microsome. Microsomes are not the cell organelles. These are the broken pieces of the endoplasmic reticulum present within or outside the cells.
What is the smallest blood cell?
Platelets are the smallest of the three major types of blood cells. Platelets are only about 20\% of the diameter of red blood cells. The normal platelet count is 150,000-350,000 per microliter of blood, but since platelets are so small, they make up just a tiny fraction of the blood volume.
Why there is no backflow of blood from ventricle to auricle?
Valves maintain direction of blood flow As the heart pumps blood, a series of valves open and close tightly. These valves ensure that blood flows in only one direction, preventing backflow. The tricuspid valve is situated between the right atrium and right ventricle.
Why is the nucleus important?
3 days ago
The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) and carries the genes, structures that contain the hereditary information. Nucleoli are small bodies often seen within the nucleus.