Place the correct word in the missing position to complete t

Place the correct word in the missing position to complete the sentences.

1. Promoter

2. Will not

3. control region

4. presence

5. operon

6. will

7. operator

8. overabundance

9. repressor

10. repression

11. induction

The______ is the region of DNA where RNA polymerase initially binds.

2. The ___________contains a promoter and an operator.

3. If the repressor is bound to the operator, then RNA polymerase_________ transcribe the structural genes.

4.__________ decreases expression of the structural genes. This typically occurs in response to an ___________of a substrate.

5. An ____________controls the expression of functionally related genes and consists of a control region and structural genes.

6. If the repressor is not bound to the operator, then RNA polymerase______________ transcribe the structural genes.

7._________ increases expression of the structural genes. This typically occurs in response to the_____________ of a substrate.

8. The ____________________operates differently depending on whether the operon is inducible or repressible.

9. The______________ controls whether RNA polymerase can advance along the DNA strand or not.

Solution

1. The Promoter is the region of DNA where RNA polymerase initially binds.

2. The operon contains a promoter and an operator.