Which of the following statements are true?
a) operons control the activity of an enzyme
b) operons control of the synsthesis of an enzyme
c) both operons and feedback inhibition control the synthesis of an emzyme
d) operons can induce or imate enzyme synthesis but can not repress enzyme synthesis

C

Explanation:

The operon is a constitution of genes transcribed together – hence developing a functional element to the cell -and have an operator and regulatory gene within it. The activity of the operon is regulated by a positive and negative feedback mechanism that is a response to the cells environment. An activator or a repressor molecule activates or represses, respectively, the transcription of the operon.

[content deleted] - user123802726recklesschicken

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.