- Do prokaryotes have a protein coat?
- Can prokaryotes be infected by viruses?
- Is a virus a prokaryote?
- Does virus have a protein coat?
- Why do cells make different proteins?
- How do prokaryotes make proteins?
- How is prokaryotic DNA packaged?
- What types of proteins are made by free ribosomes?
- How do cells make proteins?
- How do genes direct the production of proteins?
- What exactly are proteins?
Do prokaryotes have a protein coat?
Prokaryotes have only one cell each.
There are some organelles within the cell, which function as storage compartments, but these do not have a membrane surrounding them as they do in eukaryotes.
Instead they are surrounded by a protein coat.
At the center of the prokaryote is the nucleoid or nuclear region..
Can prokaryotes be infected by viruses?
Transduction is the process by which a virus transfers genetic material from one bacterium to another. Viruses called bacteriophages are able to infect bacterial cells and use them as hosts to make more viruses.
Is a virus a prokaryote?
Do you think viruses are prokaryotes or eukaryotes? The answer may surprise you. Viruses are not cells at all, so they are neither prokaryotes nor eukaryotes. Viruses contain DNA but not much else.
Does virus have a protein coat?
The nucleic acid of a virion is enclosed within a protein coat, or capsid, composed of multiple copies of one protein or a few different proteins, each of which is encoded by a single viral gene.
Why do cells make different proteins?
All the cells of higher organisms have the same DNA but not the same proteins. Each type of specialised cell that forms a tissue has its own pattern of gene expression and, consequently, it contains a particular set of proteins that determine its function.
How do prokaryotes make proteins?
In prokaryotes, protein synthesis, the process of making protein, occurs in the cytoplasm and is made of two steps: transcription and translation. … Translation occurs at the same time that transcription is happening in prokaryotes. Ribosomes attach to the mRNA and tell tRNA to go get the correct amino acids.
How is prokaryotic DNA packaged?
Packaging. Prokaryotes and eukaryotes package their DNA molecules with protein in structures called chromosomes. A prokaryotic chromosome is circular and resides in a cell region called the nucleoid.
What types of proteins are made by free ribosomes?
Membrane-bound ribosomes are attached to a structure known as rough endoplasmic reticulum. Free and membrane-bound ribosomes produce different proteins. Whereas membrane-bound ribosomes produce proteins that are exported from the cell to be used elsewhere, free ribosomes produce proteins used inside the cell itself.
How do cells make proteins?
When the cell needs to make a protein, mRNA is created in the nucleus. The mRNA is then sent out of the nucleus and to the ribosomes. When it is time to make the protein, the two subunits come together and combine with the mRNA. … The tRNA is then released back into the cell and attaches to another amino acid.
How do genes direct the production of proteins?
A gene directs the synthesis of a protein by a two-step process. First, the instructions in the gene in the DNA are copied into a messenger RNA (mRNA) molecule. The sequence of nucleotides in the gene determines the sequence of nucleotides in the mRNA. This step is called transcription.
What exactly are proteins?
Chemically, protein is composed of amino acids, which are organic compounds made of carbon, hydrogen, nitrogen, oxygen or sulfur. Amino acids are the building blocks of proteins, and proteins are the building blocks of muscle mass, according to the National Institutes of Health (NIH).