We have learned the following concepts/terms(a-h) in the regulation of the lac o
ID: 41800 • Letter: W
Question
We have learned the following concepts/terms(a-h) in the regulation of the lac operon. For statements 1-4, match each statement to the correct conept or term. Not all letters need to be used. Some letters may be used more than once.
a. Allosteric transition
b. Catabolite repression
c. Negative control
d. Inducible
e. Cis-acting
f. Trans-acting
g. Constitutive
h. Dominant
1. Phenotype of I+ O+ Z- / I+ O^C Z+
2. Phenotype of I+ O+ Z- / I- O+ Z+
3. A lack of lac genes expression in the absence of lactose
4. The Repressor protein, once binds lactose, no longer binds to the operator
Can someone help answer this question? I will choose best answer ASAP but I need some help on this
Explanation / Answer
1. O^C is constitutive and O^C is dominant over O+ as well as it is cis acting operator.
2. Z+ is trans acting.
3. negative, inducible control of operon as the repressor is bound to the operator region in absence of lactose and catabolite repression by cAMP-CRP complex.
4.allosteric and negative control. the binding of allolactose to the repressor causes the changes in its structure such that it can no longer bind to the operator region.
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