Answer:b.are required for the expression of specific protein-encoding genes
Explanation:
Transcription factors are proteins that bind to enzyme RNA polymerase to aid transcription( coping of information on DNA to an intermediate mRNA.
They control the expression of a particular gene. A transcriptor can be a repressor or enhancer. A repressor when they inhibit the action of RNA polymerase by blocking it from attaching to promoter sequence or enhancer by binding to RNA polymerase to enhance transcription.
Transcriptor protein can work alone or work with other protein such as silencer.
Temperature should it be drawn to 600°-650° Fahrenheit for the newly made spring has been hardened
- Hammer, sear, and trigger are the three main parts of a trigger mechanism.
- . Single-stage trigger is used on the Winchester Model 94 and Marlin Model 336 rifle.
- Lapping is the process called that entails rubbing minute amounts of metal from surfaces that must be precision-finished.
- . Gray to dark blue color would be observe if we achieved the desired drawing temperature of 600-650° Fahrenheit.
- Thermocouple pyrometer is the most common instrument for measuring high temperatures in heat-treating furnaces.
- Cherry to bright cherry color would be observe by reaching the temperature of 1,400°-1,500° Fahrenheit.
- Once the newly made spring has been hardened 600° -650° Fahrenheit temperature would observe.
To know more about trigger mechanism. visit :
brainly.com/question/13615696
#SPJ4
