Table of Contents
- 1 What are cells that have a central nucleus and a complicated inner structure?
- 2 Which type of cells have a nucleus inside of them?
- 3 Does a bacterial cell have a central nucleus?
- 4 Why is eukaryotic cell more complicated?
- 5 Does protists have a nucleus?
- 6 Do fungal cells have a nucleus?
- 7 What kind of nucleus does a red blood cell have?
- 8 How is the nucleus the control center of the cell?
What are cells that have a central nucleus and a complicated inner structure?
Chapter 2 – Cells; MIXED PRACTICE
|eukaryotic||cell that contains a central nucleus and a complicated internal structure|
|bacteria||extremely small, single-celled organisms without a nucleus; prokaryotic cells|
|phospholipid||a type of lipid molecule that forms much of a cell’s membrane|
Which type of cells have a nucleus inside of them?
Only the cells of advanced organisms, known as eukaryotes, have a nucleus. Generally there is only one nucleus per cell, but there are exceptions, such as the cells of slime molds and the Siphonales group of algae. Simpler one-celled organisms (prokaryotes), like the bacteria and cyanobacteria, don’t have a nucleus.
What is the inner structure of a cell?
A cell consists of three parts: the cell membrane, the nucleus, and, between the two, the cytoplasm. Within the cytoplasm lie intricate arrangements of fine fibers and hundreds or even thousands of miniscule but distinct structures called organelles.
Does a bacterial cell have a central nucleus?
Instead of a central nucleus, bacteria have the region called nucleoid (literally means “nucleus-like“) that contains the suspended genetic material. Unlike eukaryotic genetic material, the genophore (prokaryotic DNA), is a double stranded circular one.
Why is eukaryotic cell more complicated?
The ability to maintain different environments inside a single cell allows eukaryotic cells to carry out complex metabolic reactions that prokaryotes cannot. In fact, it’s a big part of the reason why eukaryotic cells can grow to be many times larger than prokaryotic ones.
Does prokaryotic cells have nucleus?
Prokaryotes are organisms whose cells lack a nucleus and other organelles. Prokaryotic cells are surrounded by a plasma membrane, but they have no internal membrane-bound organelles within their cytoplasm.
Does protists have a nucleus?
Protists are a diverse collection of organisms. While exceptions exist, they are primarily microscopic and unicellular, or made up of a single cell. The cells of protists are highly organized with a nucleus and specialized cellular machinery called organelles.
Do fungal cells have a nucleus?
Fungi spend much of their lives with only a single nucleus. Except, that is, when two filaments cross paths. When two lonely filaments find each other, the cells at the tip of the filaments fuse, and form new structures that have two nuclei per cell.
What makes up the nucleus of a cell?
The nucleus consists of the following structure: Nucleus is covered by the nuclear membrane. It is made up of inner and outer membrane. This membrane makes separation the cytoplasm from the nucleoplasm. It is also known as nuclear envelope, nucleolemma or karyotheka.
What kind of nucleus does a red blood cell have?
The eukaryotic cells usually have a single nucleus (mono-nucleated cell), sometimes, the cell may contain two nuclei (bi-nucleated cell) and the osteoclasts bear many nuclei (poly-nucleated cell) while the mammalian red blood cells (RBC) have no nuclei. The nucleus consists of the following structure:
How is the nucleus the control center of the cell?
The genes within these chromosomes are structured in such a way to promote cell function. The nucleus maintains the integrity of genes and controls the activities of the cell by regulating gene expression —the nucleus is, therefore, the control center of the cell.
How many nuclei does an eukaryotic cell have?
A eukaryotic cell typically has only one nucleus. However, some cells do not have nuclei, such as our red blood cells. In contrast, some cells have multiple nuclei, such as paramecium, which has one micronucleus and one macronucleus.