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What is temperate phage superinfection immunity?
c. Repression of the phage genome - A phage coded protein, called a repressor, is made which binds to a particular site on the phage DNA, called the operator, and shuts off transcription of most phage genes EXCEPT the repressor gene. The result is a stable repressed phage genome which is integrated into the host chromosome. Each temperate phage will only repress its own DNA and not that from other phage, so that repression is very specific (immunity to superinfection with the same phage).Reference: http://pathmicro.med.sc.edu/mayer/phage.htm
Is tryptophanase a exoenzyme?
No, tryptophanase is an endoenzyme, meaning it acts on a substrate within the cell where it is produced rather than outside the cell. It catalyzes the breakdown of tryptophan into indole, pyruvate, and ammonia.
Amino acids that cannot be produced by the body?
There are nine essential amino acids: histidine (essential for children), isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine. These amino acids must be supplied by food; the body cannot make them.
What chromatids are attached at the centromere?
Sister chromatids are the chromatids that are attached at the centromere. Sister chromatids are two identical copies of a chromosome produced during DNA replication, and they remain attached until they are separated during cell division.
Bodily movement produced by skeletal muscles is called?
Skeletal muscles are attached to the bones by tough cords called tendons. When nerve signals are sent from the brain and spinal cord, these muscles contract to produce movement.
How is the trp repressor protein and allosteric protein?
If Tryptophan is low in the diet, the repressor changes shape and allows the RNA polymerase to attach and copy the DNA so that Tryptophan can be produced by the cell.
What happens during enzyme repression?
this is the reverse of enzyme induction.here,E.Coli requires a regular supply of the amino acid tryptophan which is normally synthesized from raw materials using the enzyme tryptophan synthetase.if tryptophanis present in the growth medium, the bacteria will stop synthesizing tryptophan synthetase . Here, tryptophan is referred to as a corepressor. Tryptophan will combine with the repressor molecule which was originally inactive converting it to an active repressor molecule which will be able to combine with the operator gene, this will make the gene to be repressed or switched off, it will not stimulate the structural genes so no mRNA will be transcribed therefore no enzyme will be produced. When tryptophan is absent, the repressor molecule from the regulator gene remains in the inactive formand inthis form, it is unable to combine with the operator gene. So the operator gene remains switched on and therefore stimulates the structural gene,mRNA is then transcribed or for the production of mRNA. mRNA leads to the synthesis of a polypeptide which will lead to the productionof tryptophan synthetase
This protein is produced by a regulatory gene?
a repressor protein
How is flour produced and milled?
Check the link attached:
What do the upper chloroform layer develops in salkowski test?
In the Salkowski test, the upper chloroform layer develops a yellow color due to the reaction between tryptophan and sulfuric acid. This color change indicates the presence of indole compounds, which are produced by some bacteria during tryptophan metabolism.
Name the 9 essential amino acids?
The 9 essential amino acids are histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine. These amino acids cannot be produced by the body and must be obtained from the diet.
What is temperate phage superinfection immunity?
c. Repression of the phage genome - A phage coded protein, called a repressor, is made which binds to a particular site on the phage DNA, called the operator, and shuts off transcription of most phage genes EXCEPT the repressor gene. The result is a stable repressed phage genome which is integrated into the host chromosome. Each temperate phage will only repress its own DNA and not that from other phage, so that repression is very specific (immunity to superinfection with the same phage).Reference: http://pathmicro.med.sc.edu/mayer/phage.htm
What blood disorder causes l-trytophan?
l-tryptophan is not a disorder-it is an amino acid used by some people to help them sleep! that being said, it can cause a type of blood disorder if it isn't properly produced
Dreams are produced by what?
Psychologically, dreams are produced by the subconscious mind, also referred to as the unconscious. Physiologically, dreams are produced by several different areas of the brain. See attached link for information from sleep studies.
Where is melatonin made?
Melatonin is made from the amino acid tryptophan. Tryptophan is an essential amino acid, that is, the body cannot make it; we need to get it through the foods we eat. Tryptophan is found in a wide variety of foods. As we consume tryptophan during the day, the body converts it into serotonin, an important brain chemical involved with mood. Serotonin, in turn, is converted into melatonin. This conversion occurs most efficiently at night.
Is tryptophanase a exoenzyme?
No, tryptophanase is an endoenzyme, meaning it acts on a substrate within the cell where it is produced rather than outside the cell. It catalyzes the breakdown of tryptophan into indole, pyruvate, and ammonia.
Amino acids that cannot be produced by the body?
There are nine essential amino acids: histidine (essential for children), isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine. These amino acids must be supplied by food; the body cannot make them.
