The lac operon can be regulated by two distinct methods. Which of the following statements are correct?The lac operon can be act
ivated by the binding of allolactose to the repressor protein, releasing it from DNA and thereby allowing for transcription to occur.When glucose levels are low, the allosteric activator of the repressor protein dissociates, causing the repressor to release DNA and thereby allowing for transcription to occur.In response to low glucose levels, cAMP is upregulated; the binding of cAMP to the cAMP receptor protein triggers the activation of the operon.cAMP levels increase in response to low glucose levels and this secondary messenger allosterically binds to the repressor protein, causing it to release from DNA.
The lac operon can be activated by the binding of allolactose to the repressor protein, releasing it from DNA and thereby allowing for transcription to occur.
In response to low glucose levels, cAMP is upregulated; the binding of cAMP to the cAMP receptor protein triggers the activation of the operon.
Explanation:
Lactose operon or lac operon (includes lacZ, lacY and lacA genes) is found in some bacteria and the products of its genes are involved in lactose metabolism. So, this operon is active (genes are transcribed) when lactose is present and glucose is absent (or at low level). The operon is regulated by the lac repressor which acts as a lactose sensor and catabolite activator protein (CAP) which acts as a glucose sensor.
When there is lactose (in the form of allolactose) lac repressor detects it and stops being repressor. This enables transcription.
CAP detects glucose (via cAMP) and activates transcription when glucose levels are low.
If a decaying baby teeth is untreated properly without an expert's care, it may lead to permanent and serious problems in the developing permanent teeth. Which why it is advisable for parent to bring their children to their family dentist for regular check-ups to diagnose any present problems in the teeth and may be fixed right away.
<span>Meiosis II is very similar to Mitosis. In both cases chromosomes line up and sister chromatids are separated by the action of the spindle fibers. The daughter cells are genetically identical to one another.</span>
DNA profiles from a crime scene can be entered into CODIS. Therefore, law enforcement officers have the ability to identify possible suspects when no prior suspect existed. This is the best i can do, I dont know about exactly "at home" tests.
<u>Answer</u>: Large collection of stars, gas, and dust held together by gravity.
<u>Explanation:</u>
The name <em>galaxy</em> has been derived from the word <em>galaxies</em> which is a Greek word meaning milky.
In simple words a galaxy is a collection of a large number of stars, however, to be more precise <em>a galaxy is a gravity-bound collection of stars, dust, gas, dark matter and stellar remnants. </em>
There are different types of galaxies found in various shapes and size, some of the most common shapes being elliptical, irregular and spiral.
An example is the milky way galaxy that contains our solar system.