<span>The gene sequence containing an operator, promoter and repressor is known as an operon. These genes are called as structural genes. the operon is regulated by the presence/absence of the inducer such as glucose/lactose. It may also be a constitutive operon, which works all the time.</span>
I think so it is molecules
Answer:
C
Explanation:
This is the only answer that logically makes sense with the question
Isopropyl alcohol causes the DNA to precipitate. When DNA is emerged in the solution, when it comes out it will ideally clump together, making it visible. Isopropyl alcohol is a key ingredient when isolating DNA. Ethanol also can be used to achieve this.
Answer:
it had more than one lens
Explanation:
The first compound microscope had more than one lens located in the objective and eyepiece. Both the eyepiece lens and objective lens are convex. The compound microscope is used to magnify specimen at high magnification (40 - 1000x), which is achieved by the combined effect of the two sets of lenses.
