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The permeases are...

The permeases are

A

Structural membrane proteins

B

Enzymatic membrane proteins

C

Carrier membrane proteins

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
(c) Permeases are found in the plasma membrane of the cell. Which takek part in transportation of ions etc.
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Read the following statements for lac operon: i. Each operon has its specific operator and specific repressor. ii. The y gene codes permease, which increases the permeability of the cell to beta-galactosides. iii. Regulation of lac operon can be visualized as regulation of enzyme synthesis by its substrate. Select the option with the correct statements.

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Assertion :- The gene I codes for the repressor of the lac operon. Reason : The y-gene codes for permease, which increases permeability of the cell to beta -galactosidase.

Select the two correct statements out of the four (1-4) given below about lac operon. 1. Glucose or galactose may bind with the repressor and inactivate it 2. In the absence of lactose the repressor binds with the operator region 3. The z-gene codes for permease 4. This was elucidated Francois Jacob and Jacque Monod The correct statements are :

Read the following statements w.r.t. lac operon. Br a. lac-i is the constitutive gene. Br b. lac-y codes for permease to increase permeability of cell to Beta -galactoside. Br c. Lactose is the substrate for the enzyme B- galactosidase and it regulates switching on and off of the operon. br d. Regulation of lac operan can be also visualised as regulation of enzyme synthesis by its substrate.

ERRORLESS -BIOMOLECULES-Biomolecules
  1. Which one value is required for better enzymatic action

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  2. Cofactor (prosthetic group) is a part of holoenzyme. It is

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  3. The permeases are

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  4. Which one of the following is not true for enzymes

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  5. Co-enzyme is

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  6. Which of the following enzyme can form RNA fron DNA

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  7. Inhibitory effect of melonic acid on succinic dehydrogenase enzyme is

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  8. Lactose operon is considered to be glucose sensitive due to

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  9. FAD or FMN is a coenzyme. Which vitamin is incorporated into its struc...

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  10. Which of the following enzyme has/have haem as a prosthetic group (i...

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  11. Which of the following is not co-enzyme

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  12. Enzymes capable of changing their form are called

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  13. Enzymes as they exist inside the cell are

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  14. Select the type of enzyme involved in the following reaction S-G+S'r...

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  15. Template theory of enzyme action is supported by

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  16. Decline in the activity of the enzyme hexokinase by glucose 6 - phosph...

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  17. During glycolysis enzyme hexokinase chages glucose to glucose-6- phosp...

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  18. Which of the following describes the given grapgh correctly

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  19. Enzymes that catalyse inter-conversion of optical, geometrical or posi...

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  20. Systematic approach of naming enzymes has been recommended by the Comm...

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