What important role do bacteria called decomposers play?
Every part of an ecosystem is vital to its survival – from the green plants to furry animals and microscopic bacteria. The group of organisms called decomposers forms the final link in the food chain. They break down dead animals and plants and return vital nutrients to the soil.
Which of the following stimulates a person’s body to produce chemicals that destroy viruses or bacteria?
What process results in genetically different bacteria?
Conjugation is a process by which one bacterium transfers genetic material to another bacterium through direct contact. During conjugation, one of the bacterial cells serves as the donor of the genetic material, and the other serves as the recipient.
Which phrase describes the size of virus particles?
Virus and Bacteria
|What directly provides energy for a virus?||its host|
|Which phrase describes the size of virus particles – smaller than cells, slightly larger than cells, the same size as cells?||smaller than cells|
|A hidden virus…||becomes part of the host cell’s genetic material.|
Where is the genetic material of a virus?
When a virus particle is independent from its host, it consists of a viral genome, or genetic material, contained within a protein shell called a capsid. In some viruses, the protein shell is enclosed in a membrane called an envelope.
How many protein coding genes are there?
It includes almost 5,000 genes that haven’t previously been spotted — among them nearly 1,200 that carry instructions for making proteins. And the overall tally of more than 21,000 protein-coding genes is a substantial jump from previous estimates, which put the figure at around 20,000.
Are genes found in protein?
Most genes contain the information needed to make functional molecules called proteins. (A few genes produce other molecules that help the cell assemble proteins.) The journey from gene to protein is complex and tightly controlled within each cell. It consists of two major steps: transcription and translation.
What do proteins do in genes?
A protein is composed of one or more long chains of amino acids, the sequence of which corresponds to the DNA sequence of the gene that encodes it. Proteins play a variety of roles in the cell, including structural (cytoskeleton), mechanical (muscle), biochemical (enzymes), and cell signaling (hormones).