An operon is a stretch of DNA consisting of an operator, a promoter, and genes for a related set of proteins, usually making up an entire metabolic pathway.
operon is a functional unit of gene.
This cluster of gene transcribed together to give a messenger RNA which further give rises to protein.
operator in operon is the site where repressor binds.
promoter is where Mrna binds , where our genes are transcribed
structural genes, they code for the enzyme that are involved in this metabolic pathway.
Operons have an important role to play as they produce protein for the cell this serves them energy, the protein is produced only when energy is required.
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Chemicals can make mutations by a number of mechanisms. Base
analogs are incorporated into DNA and mostly pair with the wrong base.
Alkylating agents, deaminating chemicals, hydroxylamine, and oxidative radicals
change the structure of DNA bases, thus altering their pairing properties.
Introducing agents wedge between the bases and cause single-base insertions and
deletions in replication.
A)Antibiotics can always be used to treat bacterial infections.
Answer:
The image on the left is unicellular. Unicellular means to be made of one cell and the two on the right are multicellular, made of multiple cells.
<u>Temperature, humidity and elevation </u>are the two major factors determining the distribution of terrestrial biomes.
- A region of land with a similar climate and comparable plant and animal communities is referred to as a terrestrial biome. Different terrestrial biomes are typically described in terms of the trees, shrubs, and grasses that inhabit them.
- The Terrestrial biome type is influenced by variables including latitude, humidity, and elevation:
- A Terrestrial biome's latitude indicates how far it is from the equator. You will find the Arctic, boreal, temperate, subtropical, and tropical biomes as you move from the poles to the equator
- The amount of water in the air is known as humidity. Humid air is defined as having a high concentration of water vapor.
- The biomes will be referred to as semi-humid, semi-arid, or arid as we move away from the most humid environment (the driest).
- Elevation refers to the elevation of land above sea level. It becomes chilly.
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